Lucent Technologies USS 720 User Manual

Information Manual, Rev. 1

September 1999

Evaluation Kit for USS-720 Instant USB™

USB-to-IEEE* 1284 Bridge

Introduction

The Lucent Technologies Microelectronics Group USS-720 Evaluation Kit is an assembly of all the peripheral-

related hardware, software, and documentation necessary to evaluate the USS-720 device and begin develop-

ment efforts. The kit is comprised of three primary components:

■ Information Manual that contains a collection of data sheets, application notes, and other documents regard-

ing the USS-720, its device driver, and sample applications

■ In-System Design (ISD) USB Smart Cable

■ A 3 1/2 in. diskette containing related device drivers and sample application software for use with OSR2.1/

†

QFE 1214 and Microsoft Windows 98.

A complete description of the contents is listed in the Evaluation Kit Contents section.

* IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.

† Microsoft and Windows are registered trademarks of Microsoft Corporation.

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Table of Contents (continued)

USS-720 Instant USB USB-to-IEEE 1284 Bridge Preliminary Data Sheet.........................5-1

Features .............................................................................................................................................................. 5-1

Description ........................................................................................................................................................... 5-1

Pin Information .................................................................................................................................................... 5-3

Overview ............................................................................................................................................................... 5-5

USB Port .............................................................................................................................................................. 5-5

Device Descriptor, Conﬁgurations, and

Interfaces....................................................................................................................................................... 5-5

Supported Descriptors .......................................................................................................................... 5-5

Descriptor Locations...................................................................................................................................... 5-5

Onboard Device Descriptor ........................................................................................................................... 5-6

Conﬁguration Descriptor................................................................................................................................ 5-7

Interface Descriptors...................................................................................................................................... 5-8

Interface 0, Alternate Setting 0 (I0:A0) ................................................................................................. 5- 8

Interface 0, Alternate Setting 1 (I0:A1) ................................................................................................. 5-9

Interface 0, Alternate Setting 2 (I0:A2) ............................................................................................... 5-10

Pipes............................................................................................................................................................ 5-11

Control Pipe ....................................................................................................................................... 5-11

Bulk In Pipe ........................................................................................................................................ 5-11

Bulk Out Pipe ..................................................................................................................................... 5-11

Interrupt Pipe ..................................................................................................................................... 5-11

Interpipe Synchronization .................................................................................................................. 5-11

Requests ..................................................................................................................................................... 5-11

Standard Requests...................................................................................................................................... 5-11

Printer Class-Speciﬁc Requests.................................................................................................................. 5-12

GET_DEVICE_ID ............................................................................................................................... 5-12

GET_PORT_STATUS ......................................................................................................................... 5-12

SOFT_RESET .................................................................................................................................... 5-12

Vendor-Speciﬁc Requests ........................................................................................................................... 5-13

GET_1284_REGISTER ..................................................................................................................... 5-13

SET_1284_REGISTER ...................................................................................................................... 5-13

IEEE 1284 Port .................................................................................................................................................. 5-14

Register-Based Operation ........................................................................................................................... 5-14

Standard Mode (000) ......................................................................................................................... 5-14

Bidirectional Mode (001) .................................................................................................................... 5-14

Compatibility Mode (010) ................................................................................................................... 5-14

ECP Mode (011) ................................................................................................................................ 5-14

EPP Mode (100) ................................................................................................................................. 5-14

Registers ..................................................................................................................................................... 5-15

Data Register ..................................................................................................................................... 5-16

Status Register ................................................................................................................................... 5-16

Control Register ................................................................................................................................. 5-17

EPP Address Register ....................................................................................................................... 5-18

EPP Data Register ............................................................................................................................. 5-18

ECP Command Register ................................................................................................................... 5-19

Extended Control Register ................................................................................................................ 5-20

USS-720 Control Register .................................................................................................................. 5-21

USS-720 Setup Register .................................................................................................................... 5-22

Interrupts.............................................................................................................................................. 5-23

nAck Interrupt ..................................................................................................................................... 5-23

EPP Time-Out Interrupt ..................................................................................................................... 5-23

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Table of Contents (continued)

nFault Interrupt .................................................................................................................................... 5-23

Bulk In Interrupt ................................................................................................................................... 5-23

Bulk Out Interrupt ................................................................................................................................ 5-23

Change Interrupt ................................................................................................................................. 5-23

Disconnect Interrupt ............................................................................................................................ 5-23

External Circuitry Requirements ......................................................................................................................... 5-24

Filter Bypass Mode ............................................................................................................................................. 5-25

High Drive Mode ................................................................................................................................................. 5-25

Self-Powered Mode ............................................................................................................................................ 5-25

Absolute Maximum Ratings ................................................................................................................................ 5-25

Electrical Characteristics .................................................................................................................................... 5-26

Timing Characteristics ........................................................................................................................................ 5-27

Outline Diagram ...................................................................................................................................................5-28

44-Pin MQFP................................................................................................................................................5-28

Ordering Information ............................................................................................................................................5-28

Typical Circuit Showing the USS-720 Bridging USB to Parallel Port

Application Note .................................................................................................................... 6-1

Description ............................................................................................................................................................ 6-1

USS-720 USB Device Driver Preliminary User Guide ........................................................ 7-1

1. Introduction ...................................................................................................................................................... 7-1

2. Initialization ...................................................................................................................................................... 7-3

3. I/O File Functions ............................................................................................................................................ 7-3

3.1. CreateFile............................................................................................................................................... 7-4

3.2. ReadFile ................................................................................................................................................. 7-5

3.3. WriteFile ................................................................................................................................................. 7-6

3.4. DeviceIoControl ...................................................................................................................................... 7-7

3.5. CloseHandle........................................................................................................................................... 7-8

4. I/O Control Codes ............................................................................................................................................ 7-9

4.1. IOCTL_1284_ ECP_FWDTOREV ........................................................................................................ 7-10

4.2. IOCTL_1284_ECP_REVTOFWD ......................................................................................................... 7-11

4.3. IOCTL_1284_ ECP_SET_CHANNEL .................................................................................................. 7-12

4.4. IOCTL_1284_ SET_MODE .................................................................................................................. 7-13

4.5. IOCTL_1284_ TERMINATE.................................................................................................................. 7-14

4.6. IOCTL_ABORT_PIPE........................................................................................................................... 7-15

4.7. IOCTL_CANCEL_PIPE_REQUEST..................................................................................................... 7-16

4.8. IOCTL_GET_1284_REGISTER ........................................................................................................... 7-17

4.9. IOCTL_GET_ALTSETTING.................................................................................................................. 7-18

4.10. IOCTL_GET_CAPABILITIES.............................................................................................................. 7-19

4.11. IOCTL_GET_CONFIGURATION_DESCRIPTOR .............................................................................. 7-20

4.12. IOCTL_GET_DEVICE_DESCRIPTOR............................................................................................... 7-21

4.13. IOCTL_GET_DEVICE_INSTANCES .................................................................................................. 7-22

4.14. IOCTL_GET_INTERFACE.................................................................................................................. 7-23

4.15. IOCTL_GET_PORT_STATUS ............................................................................................................ 7-24

4.16. IOCTL_ISSUE_USS720_COMMAND................................................................................................ 7-25

4.17. IOCTL_READ_INTERRUPT_PIPE .................................................................................................... 7-26

4.18. IOCTL_RESET_PIPE......................................................................................................................... 7-27

4.19. IOCTL_SET_1284_REGISTER.......................................................................................................... 7-28

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Table of Contents (continued)

4.20. IOCTL_SET_ALTSETTING ................................................................................................................ 7-29

4.21. IOCTL_SOFT_RESET........................................................................................................................ 7-30

5. I/O Control Data Structures ........................................................................................................................... 7-31

5.1. DEVICE_INSTANCE_HEADER............................................................................................................ 7-31

5.2. DEVICE_INSTANCE............................................................................................................................. 7-31

5.3. REGISTER_1284 ................................................................................................................................. 7-32

5.4. ADVREGISTER_1284 .......................................................................................................................... 7-33

USS-720 USB Port Monitor Application Note .....................................................................8-1

Description ........................................................................................................................................................... 8-1

Instructions for Downloading Software for Use with the In-System Design USB

Smart Cable Application Note .............................................................................................9-1

Introduction .......................................................................................................................................................... 9-1

Software Installation Instructions ......................................................................................................................... 9-1

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Evaluation Kit Contents

The Lucent Technologies USS-720 Evaluation Kit consists of the following components:

1. One USS-720 Information Manual containing:

■ An introduction to the USS-720 Evaluation Kit

■ USS-720 Software Licensing information covering the related software

■ Lucent Technologies Incorporating Customer Data into USS-720 Evaluation Kit Software Using the Build Me

One Utility, Application Note, February 1999, Rev. 1 (AP99-001CMPR-01)

■ Lucent Technologies USS-720 Instant USB USB-to-IEEE 1284 Bridge, Preliminary Data Sheet,

September 1999, Rev. 5 (DS98-393CMPR-5)

■ Lucent Technologies Typical Circuit Showing USS-720 Bridging USB to Parallel Port, Application Note,

February 1999, Rev. 2 (AP97-069CMPR-2)

■ Lucent Technologies USS-720: USB Device Driver, Preliminary User Guide, February 1999, Rev. 2 (MN98-

005CMPR-02)

■ Lucent Technologies USS-720: USB Port Monitor, Application Note, February 1999, Rev. 2 (AP98-

004CMPR-02)

■ Lucent Technologies Instructions for Downloading Software for Use with the In-System Design USB Smart

Cable, Application Note, June 1999, Rev. 3 (AP97-070CMPR-03)

2. One ISD USB Smart Cable: This cable assembly contains a Lucent Technologies USS-720 device embedded

in the Centronics “B” connector end.

3. One 3 1/2 in. diskette containing the following ﬁles:

■ glucent.zip

// Zipped text ﬁle containing example description of bytes used to program

an external EEPROM to be used with Lucent USS-720.

Note: Prior to programming the EEPROM, the data in this sample ﬁle

must be modiﬁed by the customer to include the customer’s speciﬁc

data.

■ CleanUp.exe

// The Cleanup application is a ﬁle unistall program to be used prior to re-

installing driver ﬁles during the USS-720 USB enumeration process.

Cleanup.exe is a utility provided as a convenience to developers using

the evaluation kit. It removes the driver ﬁles from the system.

Cleanup.exe only works with the driver ﬁles provided with the evaluation

kit and is not suitable, nor licensed, for distribution to end-users.

■ \Win95_OSR21:

— USS720.INF

// ISD USB Smart Cable Install ﬁle

— USS720CI.DLL

— USS720.SYS

— USS720IN.DLL

— USS720MN.DLL

// ISD USB Smart Cable PnP Class Installer

// Release version of USS-720 USB Device Driver for OSR2.1

// ISD USB Smart Cable PnP Printer Port Monitor Installer

// Release version of ISD USB Printer Port Monitor

■ \Win95_OSR21\Debug:

— USS720.INF

— USS720.SYS

— USS720CI.DLL

— USS720IN.DLL

— USS720IO.H

// Debug version of USS720.INF for OSR2.1

// Debug version of USS720.SYS for OSR2.1

// Debug version of USS720CI.DLL for OSR2.1

// Debug version of USS720IN.DLL for OSR2.1

// Include ﬁle required when developing an interface to the USS-720

device driver

— USS720MN.DLL

// Debug version of ISD USB Printer Port Monitor

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Evaluation Kit Contents (continued)

■ \Win98:

— USS720.INF

// ISD USB Smart Cable Install ﬁle

— USS720.SYS

— USS720CI.DLL

— USS720IN.DLL

— USS720MN.DLL

// Release version of USS-720 USB Device Driver for Windows 98

// ISD USB Smart Cable PnP Class Installer

// ISD USB Smart Cable PnP Printer Port Monitor Installer

// Release version of ISD USB Printer Port Monitor

■ \Win98\Debug

— USS720.INF

— USS720.SYS

— USS720CI.DLL

— USS720IN.DLL

— USS720IO.H

// Debug version of USS720.INF for Windows 98

// Debug version of USS720.SYS for Windows 98

// Debug version of ISD USB Smart Cable PnP Class Installer

// Debug version of USS720IN.DLL for Windows 98

// Include ﬁle required when developing an interface to the USS-720

device driver

— USS720MN.DLL

// Debug version of ISD USB Printer Port Monitor

■ \SAMPLES

— MakeFile

— test.c

// MakeFile ﬁle required for building

// Sample source

— test.exe

— test.rc

— Sources

// Executable version of sample source

// Resource ﬁle required for building

// Source ﬁle required for building

Hardware Requirements

In addition to the hardware included in the USS-720 Evaluation Kit, the following hardware is required in order to

use the kit:

■ Personal computer with 486 (or higher) processor with:

— 16 Mbytes of RAM.

— USB connector.

And one of the two following operating systems:

— Windows 98 or

— Windows 95 version 4.00.950b with the USB supplement (QFE 1214), also known as OSR2.1.

Note: No upgrade path is available from previous versions of Windows 95 version 4.00.950 to OSR2.1; Windows

95 version 4.00.950B (OSR2.0) must ﬁrst be installed, and then the system can be upgraded to OSR2.1.

■ Printer or other peripheral device conforming to IEEE Standard 1284.

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Getting Started Instructions

An initial evaluation of the USS-720 device can be performed using the In-System Design USB Smart Cable (i.e.,

the Lucent USS-720-based USB printer cable), the above-mentioned required hardware, and software supplied on

the 3 1/2 in. diskette included in this kit. The basic evaluation procedure consists of the following steps outlined

below for OSR2.1 and Windows 98:

OSR2.1 Cable Installation Instructions:

1. Connect the USB printer cable to a printer that is turned on and follow the instructions listed below. (Note that

although it is not necessary to plug the USB printer cable into a printer to perform the following steps, the use of

the printer provides a better demonstration of the USS-720 device's functionality.)

2. With the PC running OSR2.1/QFE 1214, plug the USB end of the USB printer cable into the PC's USB port.

A New Hardware Found box will appear stating that an Unknown Device has been found. Then, the Building

Driver Information Database box will appear as the database is being built. At the end of this process, the

Update Device Driver Wizard box will appear on the screen.

3. Follow the prompts to complete the installation of the Unknown Device, i.e., the USB printer cable:

a. Insert the diskette into the ﬂoppy disk drive.

b. Click on the Next button in the Update Device Driver Wizard box. Using the “Browse” button, direct the sys-

tem to the Win95_OSR21 folder on the diskette to ﬁnd the driver for the “Lucent USS720-based USB Cable.”

c. Click on the Finish button.

4. At this point, the ﬁles should automatically be copied from the diskette. The installation process is now com-

plete.

Note: If a Plug and Play printer is being used, then a Plug and Play prompt may appear at this point to install the

printer drivers.

5. To verify that the Lucent USS-720-based USB cable has been correctly installed, right click on My Computer,

and then left click on Properties to access the System Properties box.

6. Choose the Device Manager tab in this box. The “Lucent USS720-based USB Cables” device type should

appear in the list under “Computer”.

7. Double click on “Lucent USS720-based USB Cables”. Another entry, “Lucent USS720-based USB Cable”

device will appear underneath.

8. Now double click on “Lucent USS720-based USB Smart Cable”. A “Lucent USS720-based USB Cable Proper-

ties” box will appear. If the installation was successful, the device status will state that the device is working

properly. If the installation was not successful, use the Cleanup.exe ﬁle on the diskette to ﬁrst uninstall the soft-

ware, then return to step 2 above.

Note: Cleanup.exe is a utility provided as a convenience to developers using the evaluation kit. It removes the

driver ﬁles from the system. Cleanup.exe only works with the driver ﬁles provided with the evaluation kit and

is not suitable, nor licensed, for distribution to end-users.

If the installation was successful and a printer was attached to the USB printer Cable in step 1, a test page can now

be printed:

■ Click on Start/Settings/Printers.

■ Right click on the icon for the printer connected to the USB printer cable, then left click on Properties.

■ Choose the Details tab. Select the correct USBLPT port [e.g., USBLPT1 (USB Port)] under “Print to the following

port:”. Under “Print using the following driver:”, select the driver that corresponds to the correct printer. Click on

the Apply button and then select the “General” tab.

■ To begin the printing process, click on the Print Test Page button.

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Getting Started Instructions (continued)

Windows 98 Cable Installation Instructions:

1. Connect the USB printer cable to a printer that is turned on and follow the instructions listed below. (Note that

although it is not necessary to plug the USB printer cable into a printer to perform the following steps, the use of

the printer provides a better demonstration of the USS-720 device's functionality.)

2. With the PC running Windows 98, plug the USB end of the USB printer cable into the PC's USB port.

A New Hardware Found box will appear stating that an Unknown Device has been found.

3. Use the Wizard to complete the installation of the Unknown Device, i.e., the Lucent USS-720-based USB

printer cable:

a. You will be prompted to insert the diskette into the ﬂoppy disk drive. Insert the Evaluation Kit’s diskette into

the ﬂoppy drive and click OK.

b. You will be prompted to direct the operating system to the correct location of the drivers. Using the “Browse”

button, direct the system to the Win98 folder on the diskette, and click OK.

c. Follow the prompts and the software ﬁles should automatically be copied from the diskette. The installation

process is now complete.

Note: If a Plug and Play printer is being used, then a Plug and Play prompt may appear at this point to install the

printer drivers.

4. To verify that the USB printer cable has been correctly installed, right click on “My Computer”, and then left click

on Properties to access the System Properties box.

5. Choose the Device Manager tab in this box. The “Lucent USS720-based Cables” device type should appear in

the list under “Computer”.

6. Double click on “Lucent USS720-based USB Cables”. Another entry, “Lucent USS720-based USB Cable” will

appear underneath.

7. Now double click on “Lucent USS720-based USB Cable”. This will cause the “Lucent USS720-based USB

Cable Properties” box to appear. If the installation was successful, the device status will state that the device is

working properly. If the installation was not successful, use the Cleanup.exe ﬁle on the diskette to ﬁrst uninstall

the software, then return to step 2 above.

Note: Cleanup.exe is a utility provided as a convenience to developers using the evaluation kit. It removes the

driver ﬁles from the system. Cleanup.exe only works with the driver ﬁles provided with the evaluation kit and

is not suitable, nor licensed, for distribution to end-users.

If the installation was successful and an already-installed printer was attached to the USB printer cable in step 1, a

test page can now be printed:

■ Click on Start/Settings/Printers.

■ Right click on the icon for the printer connected to the USB Cable, then left click on Properties.

■ Choose the Details tab. Select the correct USBLPT port under “Print to the following port:”. Under “Print using

the following driver:”, select the driver that corresponds to the correct printer. Click on the Apply button and then

select the General tab of the box.

■ To begin the printing process, click on the Print Test Page button.

If further assistance is required during the installation and/or printing process, contact either Lucent Technologies

Applications Engineering or In-System Design (see the USB Applications Support document in this manual).

Software Updates

In addition to the ﬁles included on the evaluation kit’s diskette, newer versions of the software may be available on

In-System Design’s Web Site: http://www.in-system.com. The library, uss720_dev, contains ﬁles that can be

used to evaluate the USS-720 device.

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To access software ﬁles from In-System Design’s home page, follow these steps:

1. Click on Drivers.

2. In the box labeled Library Name, type the library name: uss720_dev

3. Type the password for the library: usb_to_lpt

(Note: Use all lower-case letters.)

Notes for Developers

Please note that the driver ﬁles in this evaluation kit are for evaluation purposes only. Developers can obtain free

drivers suitable for distribution from the web site at www.in-system.com. Selecting “Drivers”, ﬁlling out the informa-

tion in the “Build Me One” section and then selecting the “Submit” button will generate a request for drivers to In-

System Design. Select “Frequently Asked Questions” to obtain more details about the required ﬁelds such as

Vendor ID. If the information is entered correctly, a response will be sent for veriﬁcation within 2—5 working days.

Use of the USS-720 Evaluation Kit by developers implies a basic understanding of the USB and IEEE 1284 inter-

faces as well as basic competency in board design and Windows driver programming. The information provided in

this kit is intended only as a guide for the development of a USB-to-IEEE 1284 bridging solution and, as such, is

not warranted for suitability to any particular purpose.

Following are additional notes regarding the software provided with the USS-720 Evaluation Kit:

USB Driver and Port Monitor

The USS-720 is supplied with a USB driver and a USB port monitor. The port monitor allows Windows printer

drivers to print to an IEEE 1284-compliant printer connected to the USS-720. Note that the supplied software will

work only with printer drivers that use the Windows spooling system to interface with the USS-720 USB port

monitor. See the USS-720 USB Port Monitor Application Note in this Manual for details.

Plug and Play

The Plug and Play capabilities of the supplied software are limited to the enumeration of the USS-720 device only.

Port Creation

The USS-720 software driver supports printing via the creation of a port named USBLPTx, where x is an integer

between 1 and 127. Each instantiation of the driver will generate another USBLPTx port. If two developers both

have products based on the USS-720 connecting to the same USB bus, it may not be clear which device is

connected to which USBLPTx port.

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Notes for Developers (continued)

EEPROM

Developers using the USS-720 must use an external serial EEPROM (or the equivalent) in their design and create

their own hex data ﬁle for use in programming the EEPROM at their site. See the USS-720 data sheet and the

glucent.zip ﬁle on the kit’s diskette for more information. The conﬁguration data stored in this serial EEPROM is

used by the Microsoft host software during enumeration to load the appropriate drivers. Using unique identiﬁcation

data in the EEPROM provides a means for the developer to ensure that only their software is loaded for use with

their device. Otherwise, the enumeration of a camera using the USS-720 could cause the software for a USS-720-

based printer to be loaded, resulting in a system which does not function correctly.

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USB Applications Support

Applications support for Lucent Technologies USS-720 Universal Serial Bus products can be obtained by

contacting the following:

Lucent Technologies Microelectronics Group

1247 S. Cedar Crest Blvd.

Allentown, PA 18103 U.S.A.

Phone: (610) 712-2947

FAX: (610) 712-2820, Attention: USB Applications Engineering

e-mail: [email protected]

77 Science Park Drive #03-18

Cintech III, Singapore 118256

Phone: (65) 870 5733

FAX: (65) 777 7495, Attention: Jeffrey Lam

e-mail: [email protected]

In-System Design, Inc.

12426 W. Explorer Drive

Suite 100

Boise, Idaho 83713 U.S.A.

Phone: (208) 377-9222

FAX: (208) 377-9333

e-mail: [email protected] (Subject: USB)

Please see “Notes for Developers” in the Introduction of this Information Manual for more information on avail-

able driver support.

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February 1999

USS-720

Software Use Agreement

Evaluation Kit Software

Introduction

In accordance with the license agreement that follows, your use of the software and other information furnished

as part of the USS-720 Evaluation Kit is intended for uses in connection with evaluating and testing Lucent’s

USS-720 device and beginning development efforts. In addition, subject to the license agreement, you may

also distribute the software with the your USS-720 based peripheral. The software furnished as part of the Kit,

along with updates, is also available (without charge) at In System Design, Inc.’s website at www.in-

system.com.

Before evaluating or distributing the software, it is advisable to visit the website to access any updates and in

some cases, to furnish certain information relating to your peripheral.

BY USING THE SOFTWARE FURNISHED AS PART OF THE EVALUATION KIT OR ACCESSING THE

SOFTWARE AT THE IN-SYSTEM WEBSITE, YOU AGREE TO THE LICENSE AGREEMENT THAT

FOLLOWS. IF YOU DO NOT AGREE WITH THE LICENSE AGREEMENT PLEASE RETURN THE KIT TO

LUCENT AND REFRAIN FROM ANY USE OF THE SOFTWARE.

Please Note: The software available through the website that is free of charge is suitable for most printing

applications where the end-user manually installs the printer driver. However, the free software has limited

functionality with respect to some features, such as “Child Discovery” which enables the attached printer to

“Plug and Play.” Such enhanced versions of the software are available under a separate licensing agreement

based on per unit royalties payable to In-System Design, Inc. (Contact In-System Design Marketing for more

details: [email protected]).

USS-720 Driver Software (Object Code) License Agreement

Note: Capitalized terms have the meanings ascribed to them in the Deﬁnitions Appendix.

The use and distribution of USS720 driver software by any LICENSEE is strictly limited to the following terms

and conditions:

ARTICLE I—RIGHT TO USE LICENSED SOFTWARE

1.01 Grant of Right

(a) LUCENT TECHNOLOGIES INC. (“LUCENT”) grants to LICENSEE personal, nontransferable, and nonex-

clusive rights (i) to use the LICENSED SOFTWARE to evaluate and test the LUCENT DEVICE, (ii) to use

LICENSED SOFTWARE with the LUCENT DEVICE when incorporated in SYSTEMS and (iii) subject to

Section 1.01(e), to furnish copies of LICENSED SOFTWARE to LICENSEE's customers worldwide in

object-code form solely for use in SYSTEMS.

(b) No right is granted for the use of LICENSED SOFTWARE for or by any third person except as provided

above or for use of any portion of LICENSED SOFTWARE other than for use in SYSTEMS.

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USS-720

Software Use Agreement

February 1999

USS-720 Driver Software (Object Code) License Agreement (continued)

rights are granted hereunder, provided that each such copy contains any copyright and/or proprietary notice

appearing on or in the LICENSED SOFTWARE being copied.

(d) LICENSEE agrees that it will not use or copy LICENSED SOFTWARE except as authorized herein.

(e) LICENSEE agrees that any distribution of the LICENSED SOFTWARE to customers shall only be in object

code form and pursuant to a license agreement containing essentially the following:

(i) only a personal, nontransferable, and nonexclusive right to use such copy in SYSTEMS is granted to such

customer;

(ii) no ownership interest in LICENSED SOFTWARE is transferred to such customer;

(iii) such customer will not copy LICENSED SOFTWARE except as necessary to use LICENSED SOFT-

WARE in SYSTEMS and for backup and archive purposes in connection with such use and will include all

(iv) if a customer's right-to-use is terminated for any reason, such customer will either destroy or return all

copies of LICENSED SOFTWARE in its possession;

(v) such customer will not export or re-export LICENSED SOFTWARE without the appropriate Unites States

and/or foreign government licenses;

(vi) such customer will not reverse compile or disassemble LICENSED SOFTWARE, subject to applicable

exceptions if such customer’s address is in one of the Member States of the European Economic Commu-

nity; and

(vii) LUCENT does not warrant LICENSED SOFTWARE, does not assume any liability regarding LICENSED

SOFTWARE, and does not undertake to furnish any support or information to such customer regarding

LICENSED SOFTWARE.

(f) LICENSEE agrees to use its best efforts to enforce the agreements with customers referred to in Section

1.01(e).

(g) The agreement speciﬁed in Section 1.01(e) may be (i) a written agreement signed by the customer or (ii) a

written agreement on or accompanying the package containing the LICENSED SOFTWARE that is visible or

otherwise disclosed to the customer before the customer opens the package, that the customer accepts by

opening the package and that complies with applicable law governing such agreements.

1.02 Furnishing of LICENSED SOFTWARE

Subject to receipt by LUCENT of the fee speciﬁed in Section 2.01, within a reasonable time after such receipt,

LUCENT shall furnish LICENSED SOFTWARE to LICENSEE in the form speciﬁed in the attached Schedule.

1.03 Ownership

No ownership interest in LICENSED SOFTWARE is transferred to LICENSEE hereunder. LICENSEE's ownership

interest is limited solely to those portions of LICENSEE's adaptations that do not contain any of LICENSED SOFT-

WARE.

1.04 U.S. Export Control

LICENSEE acknowledges that LICENSED SOFTWARE is subject to export restrictions under U.S. Export Admin-

istration Regulations and international arrangements of the U.S. Government. LICENSEE agrees not to ship or

otherwise transmit LICENSED SOFTWARE except in compliance with all such U.S. Government regulations and

arrangements.

3-2

Lucent Technologies Inc.

USS-720

Software Use Agreement

February 1999

USS-720 Driver Software (Object Code) License Agreement (continued)

ARTICLE II—FEES AND PAYMENTS

2.01 Fees

LICENSEE shall, within thirty (30) days after execution of this Agreement by both parties and invoice by LUCENT,

pay to LUCENT a fee of _________ for the rights granted herein.

2.02 Taxes

LICENSEE shall pay any tax (and any related interest or penalty), however designated, imposed as a result of the

existence or operation of this agreement, including any tax which LICENSEE is required to withhold or deduct from

payments to LUCENT, except (i) any such tax imposed upon LUCENT or any of its subsidiaries in the jurisdiction in

which the aforesaid ofﬁce of LICENSEE is located if such tax is allowable as a credit against United States income

taxes of LUCENT or any of its subsidiaries; and (ii) any income tax imposed upon LUCENT or any of its subsid-

iaries by the United States or any governmental entity within the United States proper (the ﬁfty states and the

District of Columbia). To assist LUCENT in obtaining the credit identiﬁed in (i) of this Section 2.03, LICENSEE shall

furnish LUCENT with such evidence as may be required by United States taxing authorities to establish that any

such tax has been paid. Fees speciﬁed in this agreement do not include taxes.

ARTICLE III—TERMINATION

3.01 Termination for Breach

If LICENSEE fails to fulﬁll one or more of its obligations under this agreement, LUCENT may, upon its election and

in addition to any other remedies that it may have, at any time terminate all the rights granted by it hereunder by not

less than two (2) months' written notice to LICENSEE specifying any such breach, unless within the period of such

notice all breaches speciﬁed therein have been remedied. Upon such termination, LICENSEE shall destroy all

copies of LICENSED SOFTWARE in its possession and certify such destruction in writing to LUCENT within thirty

(30) days. In the event of such termination by LUCENT, LUCENT shall have no obligation to refund any amount

paid pursuant to Section 2.01.

3.02 Survival

The obligations of LICENSEE under Sections 1.04 and 4.04 shall survive and continue after any termination of

rights under this agreement.

Lucent Technologies Inc.

3-3

USS-720

Software Use Agreement

February 1999

USS-720 Driver Software (Object Code) License Agreement (continued)

ARTICLE IV—MISCELLANEOUS PROVISIONS

4.01 Agreement Prevails

This agreement shall prevail notwithstanding any conﬂicting terms or legends which may appear on or in

LICENSED SOFTWARE.

4.02 Warranty and Indemnity

(a) LUCENT warrants that LICENSED SOFTWARE will be in good working order at the time it is furnished. If

LICENSED SOFTWARE is not in good working order at such time, LUCENT will, upon return of LICENSED

SOFTWARE at any time within ninety (90) days after LICENSED SOFTWARE was ﬁrst furnished, replace

LICENSED SOFTWARE without charge.

(b) The devices in the LUCENT CHIP SET are covered by the warranty and indemnity provisions set forth in the

LUCENT terms and conditions pursuant to which such products are sold.

IMPLIED, REGARDING LICENSED SOFTWARE. BY WAY OF EXAMPLE, BUT NOT OF LIMITATION,

LUCENT AND ITS AFFILIATES MAKE NO REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY

OR FITNESS FOR A PARTICULAR PURPOSE OR THAT THE USE OF LICENSED SOFTWARE WILL NOT

INFRINGE ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. LUCENT AND ITS

AFFILIATES SHALL NOT BE HELD TO ANY LIABILITY WITH RESPECT TO ANY CLAIM BY LICENSEE, OR

A THIRD PARTY ON ACCOUNT OF, OR ARISING FROM, THE USE OF LICENSED SOFTWARE.

(d) Nothing herein confers on LICENSEE, or upon anyone claiming under LICENSEE, any license (expressly,

impliedly, by estoppel or otherwise) under any patent of LUCENT or others covering or relating to any combina-

tion in which LICENSED SOFTWARE is or might be used.

4.03 Nothing Construed

Nothing contained herein shall be construed as:

(i) conferring by implication, estoppel, or otherwise any license or right to use any name, trade name, trade-

mark, service mark, symbol, or any other identiﬁcation or any abbreviation, contraction, or simulation

thereof;

(ii) an obligation upon LUCENT or any of its afﬁliates to furnish any person, including LICENSEE, any assis-

tance of any kind whatsoever or any information or documentation other than LICENSED SOFTWARE to

be furnished pursuant to Section 1.02; or

(iii except for the right to furnish object-code versions to customers as provided in Section 1.01(a)(ii), a right

to sell, lease, sublicense or otherwise transfer or dispose of LICENSED SOFTWARE, in whole or in part.

4.04 Conﬁdentiality

(a) LICENSEE agrees to hold all parts of LICENSED SOFTWARE in conﬁdence for LUCENT. LICENSEE further

agrees not to make any disclosure of LICENSED SOFTWARE (including methods or concepts utilized therein)

to anyone, except to employees of LICENSEE to whom such disclosure is necessary to the use for which rights

are granted hereunder.

(b) LICENSEE shall ensure that an obligation not to disclose conﬁdential information forms part of its terms of

employment.

3-4

Lucent Technologies Inc.

USS-720

Software Use Agreement

February 1999

USS-720 Driver Software (Object Code) License Agreement (continued)

WARE (including any method or concept utilized therein) that:

(i) is or becomes available without restriction to the general public by acts not attributable to LICENSEE or its

employees,

(ii) was rightfully in LICENSEE's possession without limitation on disclosure before disclosure hereunder to

LICENSEE,

(iii) is rightfully disclosed to LICENSEE by a third party without restrictions on disclosure, or

(iv) is independently developed by LICENSEE.

4.05 Publicity

LICENSEE agrees that it will not, without the prior written consent of LUCENT;

(i) use in advertising, publicity, packaging, labeling, or otherwise any trade name, trademark, trade device,

service mark, symbol, or any identiﬁcation or any abbreviation, contraction or simulation thereof owned by

LUCENT or any of its afﬁliates or used by LUCENT or any of its afﬁliates to identify any of its or their prod-

ucts or services or

(ii) represent, directly or indirectly, that any product or service of LICENSEE is a product or service of

LUCENT or any of its afﬁliates or is made in accordance with or utilizes any information or documentation

of LUCENT or any of its afﬁliates.

4.06 Nonassignability

Neither this Agreement nor any rights hereunder shall be assignable or transferable (in insolvency proceedings or

otherwise) by LICENSEE without the express written consent of LUCENT. Any purported transfer or assignment in

contravention of this provision shall be considered void and ineffective.

4.07 Addresses

Any statement, notice, request, or other communication hereunder shall be deemed to be sufﬁciently given to the

addressee and any delivery hereunder deemed made when sent by certiﬁed mail addressed as follows:

to LUCENT:

LUCENT TECHNOLOGIES INC.

555 Union Boulevard

Allentown, Pa. 18103-1229

ATTN.:

to LICENSEE:

{company name}

{company street address}

{company city, state, zip}

{company phone number}

or to such changed address as the addressee shall have speciﬁed by written notice.

4.08 Integration

This agreement sets forth the entire agreement and understanding between the parties as to the subject matter

hereof and merges all prior discussions between them. Neither of the parties shall be bound by any warranties,

understandings, or representations with respect to such subject matter other than as expressly provided herein, in

the object code agreement or in a writing executed with or subsequent to the execution of this agreement by an

authorized representative of the party to be bound thereby.

Lucent Technologies Inc.

3-5

USS-720

Software Use Agreement

February 1999

USS-720 Driver Software (Object Code) License Agreement (continued)

4.09 Applicable Law

The construction and performance of this agreement shall be governed by the laws of the State of New York,

U.S.A., excluding choice of law rules.

4.10 Disputes

If a dispute arises out of or relates to this Agreement, or its breach, the parties agree to submit the dispute to a sole

mediator selected by the parties or, at any time at the option of a party, to mediation by the American Arbitration

Association (“AAA”). If not thus resolved it shall be referred to a sole arbitrator selected by the parties within thirty

(30) days of the mediation or, in the absence of such selection, to AAA binding arbitration which shall be governed

by the United States Arbitration Act and judgment on the award may be entered in any court having jurisdiction.

The mediation or arbitration shall be held in New York City. The arbitrator may not limit, expand or otherwise modify

the terms of the Agreement. The arbitrator shall not have authority to award punitive, exemplary or other damages

in excess of compensatory damages and each party irrevocably waives any claim thereto. Each party shall bear its

own expenses and those of the mediator and arbitrator shall be borne equally. The parties, their representatives,

other participants and the mediator and arbitrator shall hold the existence, content and result of mediation and arbi-

tration in conﬁdence.

IN WITNESS WHEREOF, each of the parties has caused this agreement to be executed in duplicate originals by its

duly authorized representatives on the respective dates entered below.

LUCENT TECHNOLOGIES INC.

{Marketing person's name}

{Marketing person's title}

Title

Date

Signed:___________________________________

{company name}

Title

Date

Signed:___________________________________

3-6

Lucent Technologies Inc.

USS-720

Software Use Agreement

February 1999

USS-720 Driver Software (Object Code) License Agreement (continued)

DEFINITIONS APPENDIX

LUCENT DEVICE means the LUCENT USS720 device.

LICENSEE means a customer of Lucent’s USS720 device using the LICENSED SOFTWARE.

LICENSED SOFTWARE means all or any portion of the software ﬁles in object-code form, other information and

documentation speciﬁcally listed in the attached “Schedule for LUCENT USS720 Driver Software and any updates

that may be furnished to LICENSEE.”

SYSTEM means any system manufactured by LICENSEE incorporating one or more LUCENT DEVICES.

Schedule for LUCENT USS720 Driver Software (Object Code)

1. Software Files

The following software ﬁles will be furnished in object-code form on 3.5” Floppy Disk or by electronic mail:

----------------

1. Class Installer,

USS720CI.DLL;

2. USB WDM device driver, USS720.SYS;

3. Port monitor installer,

4. Port monitor,

5. Install ﬁle,

USS720IN.DLL;

USS720MN.DLL;

USS720.INF;

2. Documentation

One copy of the following document(s) will be furnished:

USS720 USB Device Driver

USS720 USB Port Monitor

Lucent Technologies Inc.

3-7

USS-720

Software Use Agreement

February 1999

3-8

Lucent Technologies Inc.

Application Note, Rev. 1

February 1999

Incorporating Customer Data into USS-720

Evaluation Kit Software Using the Build Me One Utility

Installer checks that all required components are

installed for OSR2.1 systems (Windows 95 with the

Introduction

USB supplement and QFE).

Using the Build Me One utility found on In-System

Design’s web site, the USS-720 Evaluation Kit soft-

ware can be modiﬁed to include data speciﬁc to a

customer’s USB peripheral. This document describes

the components, customization data, and other

general topics related to the free software provided

by Lucent Technologies and In-System Design in

If the Class Installer ﬁnds the operating system is

correct, the device driver and port monitor are

installed. If the Class Installer ﬁnds the operating

system either does not correspond to the software or

the operating system does not have all required

components, an error message is displayed.

™

support of the USS-720 Instant USB device. See

the instructions under Customer-Deﬁned Data below

for information on obtaining the free software.

WDM Device Driver

The device driver for the USB Smart Cable follows

the Windows Driver Model speciﬁcation. Note there

are different binaries for Windows 95 and

Windows 98 as different libraries are linked. Note

that the supplied software will work only with printer

drivers that use the Windows spooling system to

interface with the USS-720 USB port monitor.

Software Components

The ﬁles obtained by using the Build Me One utility

are the software necessary for standard PnP installa-

tion and operation of the USS-720-based USB Smart

Cable. This software consists of:

1. Class Installer,

2. WDM device driver,

3. Port monitor installer,

4. Port monitor,

xxxxxxCI.DLL;

xxxxxxSB.SYS;

xxxxxxIN.DLL;

xxxxxxMN.DLL;

xxxxxxSB.INF;

Port Monitor

The port monitor, developed by In-System Design, is

responsible for the communication between the

Windows spooler and a printer. This port monitor

enables printing from Windows applications using the

USB Smart Cable. The port monitor controls the I/O

port to which the physical printer is connected and is

responsible for the communication channel between

the spooler and the printer.

5. Install ﬁle,

The six-character “xxxxxx” strings are deﬁned by the

customer. (Refer to ‘Driver Name’ information in the

Customer-Deﬁned Data section below.)

Example: If “XYZPRT” is the ‘Driver Name’ deﬁned

by the customer, then the Class Installer software ﬁle

would be named XYZPRTCI.DLL.

Install File

Class Installer

The install ﬁle is modiﬁed to match the information

provided by the customer. The information in the

external EEPROM is used during the Plug and Play

process to load the correct device driver.

The Class Installer checks that the operating system

version is compatible with the USB Smart Cable soft-

ware being loaded. This is necessary as there are

two different binary versions of this software, one for

Microsoft Windows* 95/OSR2.1 and one for

* Microsoft and Windows are registered trademarks of Microsoft

Corporation.

Microsoft Windows 98. Furthermore, the Class

Lucent Technologies Inc.

4-1

Incorporating Customer Data into USS-720

Evaluation Kit Software Using the Build Me One Utility

Application Note, Rev. 1

February 1999

dialog box of the device properties. The most and least

signiﬁcant bytes are swapped so that a Product ID of

0x0100 is displayed as revision 1.00. The customer is

responsible for selecting its own Product ID.

Customer-Deﬁned Data

Customer-deﬁned data may be submitted to In-System

Design using the Build Me One utility located on the In-

System Design web site. Access www.in-

system.com; select the Drivers area and then the

utility labeled “Build Me One.”

Example: “0x0100”

Driver Name

The modiﬁcation of the software requires the following

strings to be provided by the customer:

The driver name is the six-character preﬁx that is used

to form the customer’s software ﬁle names described in

the Software Components section found earlier in this

document.

1. Device Descriptor String

2. Manufacturer String

3. Vendor ID

4. Product ID

Example: “XYZPRT”

5. Driver Name

6. Port Name

Port Name

The port name is the six-character name that identiﬁes

the LPT port which represents the USB Smart Cable

attached device. In the Evaluation Kit version of the

software, this port is USBLPTx: (where x is a number

between 1 and 127).

Device Description String

This string describes the name of the customer’s

product. The install ﬁle will include a product name

string of 20 characters (including spaces).

Example: “LPTXYZ”

Example: “XYZ PRINTER CABLE”.

Plug and Play Operation (PnP)

Manufacturer String

Installation of the USB Smart Cable software is started

by connecting the USB Smart Cable to the host PC or

USB hub. Enumeration occurs and the proper software

components for the USB Smart Cable are loaded

through the normal PnP operation. Note that there is

no user interface or installer program that the user

needs to execute. The user will be prompted to insert

the ﬂoppy containing the USB Smart Cable driver

during the PnP operation.

This string is the name of the manufacturer and is

limited to 20 characters (including spaces).

Example: “XYZ CORP.”

Vendor ID

A unique USB Vendor ID is required for the software

modiﬁcation process. The Vendor ID ﬁeld is limited to

four hex characters. Prior to submitting data to In-

System Design, the customer must obtain a unique

Vendor ID from the USB organization [see

Printer Enumeration

www.usb.org/developers]. Refer to the Frequently

Asked Questions section at the bottom of the In-

System Design “Drivers” web page for more informa-

tion on Vendor IDs.

The printer attached to the USB Smart Cable does not

enumerate with this software.

Example: “0x12AB”

Product ID

The Product ID typically represents the revision

number of the product. The Product ID ﬁeld is limited to

four characters. The revision number appears in a

4-2

Lucent Technologies Inc.

Application Note, Rev. 1

February 1999

Incorporating Customer Data into USS-720

Evaluation Kit Software Using the Build Me One Utility

Operating Systems Supported

USBLPTx Ports

This software runs in Windows 95, and Windows 98.

Evaluation kit version of software:

Windows 95 must actually be OSR2.1 version 1214,

which contains the USB supplement and QFE. Each

vendor who purchases the USB Smart Cable from In-

System Design must execute an agreement with

Microsoft in order to distribute the USB supplement.

Microsoft may license the vendor to distribute the

following ﬁles to update Windows 95 software:

For each USB Smart Cable plugged into a host’s USB,

a port will be added called USBLPTx (where x can be

from 1 through 127). These ports will remain in the

system with their current status if a printer is associ-

ated with the port. If no printer is associated with a

USBLPT port when the corresponding USB Smart

Cable is removed, the port is removed from the system.

1. OEMUSB.EXE version 4.03.1214,

2. DETROITR.EXE,

Modiﬁed version of the USS-720 software:

For each USB Smart Cable plugged into a host’s USB,

a port will be added called XXXXXXx (where x can be

from 1 through 127). The “XXXXXX” string is deﬁned

by the customer, for example: “LPTXYZ”.

3. USBUPD1.EXE version 4.03.1214.

To execute a distribution agreement with Microsoft,

contact Stephanie Selden at Microsoft, email

[email protected].

Note: As of August 1998, Microsoft is no longer

EEPROM

licensing the OSR2.1 supplement.

Developers using the USS-720 must use an external

serial EEPROM (or the equivalent) in their design and

create their own hex data ﬁle for use in programming

the EEPROM at their site. See the USS-720 Data

Sheet and the glucent.zip ﬁle on the kit’s diskette for

more information. The conﬁguration data stored in this

serial EEPROM is used by the Microsoft host software

during enumeration to load the appropriate drivers.

Using unique identiﬁcation data in the EEPROM

provides a means for the developer to ensure that only

their software is loaded for use with their device.

Power Management

The USB Smart Cable supports power management

on the PC if its operating system supports the speciﬁc

power management feature. The USB Smart Cable

supports suspend and resume functions in all

supported operating systems.

Note that OSR2.1 supports suspend and resume func-

tions but there is no USB support in OSR2.1 for “0 volt

suspend” in which case some PCs cut the power upon

suspending. Windows 98 does support “0 volt

suspend.”

USB Hardware Types Supported

The USB Smart Cable operates with all OHCI and UHCI

USB controllers and hubs that are compliant with the

USB Specification, Revision 1.0.

Installation Process

The software for the USB Smart Cable is loaded auto-

matically by Windows PnP operation.

Lucent Technologies Inc.

4-3

Incorporating Customer Data into USS-720

Evaluation Kit Software Using the Build Me One Utility

Application Note, Rev. 1

February 1999

tion of the IEEE 1284 printer port. Lucent’s USS-720

customer assumes all responsibility for testing the

printers that will be used by their customers.

Printer Types Supported

The following printers have been thoroughly tested and

are known to work with the USS-720 software. Some

printers require bidirectional mode to be disabled.

There are known to be some printers which do not

work with the USB Smart Cable. This is often due to an

incompatibility with the printer’s Windows driver. Some

printers also have incompatibilities in their implementa-

Note also that this list of printers represents only those

printers that In-System Design has used to extensively

test the USS-720 software. There are many additional

printers that work with the USS-720 and its associated

software.

Table 1. Print Types Supported

Printer

Vendor

Comments

Bubble Jet BJ¹-200ex InkJet printer

Bubble Jet BJC¹-240 InkJet printer

Bubble Jet BJC-610 InkJet printer

Canon¹

Canon

Bidirectional Disabled

Bubble Jet BJC-4200 Color InkJet printer Canon

Epson Stylus²500 Color InkJet printer

Epson²America

—

Epson Stylus 800 Color InkJet printer

DeskJet³340CM printer

DeskJet 672C InkJet printer

DeskJet 692C InkJet printer

DeskJet 694C InkJet printer

DeskJet 722C InkJet printer

DeskJet 820Cse InkJet printer

DeskJet 870Cxi InkJet printer

DeskJet 1200C InkJet printer

LaserJet³4si

Epson America

—

Hewlett-Packard³

Hewlett-Packard

Lexmark⁴

—

Bidirectional Disabled

—

LaserJet 5P

LaserJet 6P

LaserJet 6L PCL

1000 ColorFine

SuperScript 860 laser printer

NEC⁵

1. BJ, BJC, and Canon are registered trademarks and Bubble Jet is a trademark of Canon Inc.

2. EPSON, the EPSON logo, and EPSON Stylus, are registered trademarks of Seiko Epson Corporation, registered in the U.S. and other coun-

tries.

3. Hewlett-Packard, DeskJet, and LaserJet are registered trademarks of Hewlett-Packard Company.

4. Lexmark is a registered trademark of Lexmark International, Inc.

5. NEC is a registered trademark of NEC Technologies Inc.

4-4

Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB™

USB-to-IEEE* 1284 Bridge

■ Supports standard PC parallel port register-based

operation

Features

Device Features:

■ Support of multiple logical channels

■ Full compliance with the Universal Serial Bus Speciﬁ-

cation Revision 1.0

■ Maximum throughput: 1.216 Mbytes/s (ECP mode)

■ On-chip transceivers for USB

Description

■ Low power consumption allows part to be powered

The USS-720 integrated circuit connects an IEEE 1284

parallel port peripheral to the universal serial bus (USB).

It is designed to be a low-cost, single-chip embedded

solution requiring minimal external components. It is

suitable for a wide range of applications, from integrated

applications where the IC is mounted on a printed-

circuit board inside a product, to stand-alone applica-

tions where the chip provides a standard parallel port to

a USB-capable computer. The USS-720 software

included in the Evaluation Kit allows peripheral vendors

to evaluate and test the USS-720 device, which is

embedded in the Centronics^†end of a USB-to-parallel

port cable provided with the kit. This solution requires

no ﬁrmware changes on the parallel port peripheral.

from USB connection

■ Dual on-chip USB packet buffers for fast response

■ Fully compatible USB host device drivers available

■ Fully compliant with USB printer device class speciﬁ-

cation

■ Implemented in Lucent Technologies Microelectron-

ics Group’s 0.35 µm, 3 V standard-cell library

■ Complete single-chip solution in a 44-pin MQFP

■ Evaluation kit available

IEEE 1284 (Parallel) Features:

■ Transparent, fully automatic support for true bidirec-

tional communication

* IEEE is a registered trademark of The Institute of Electrical and

Electronics Engineers, Inc.

† Centronics is aregistered trademark of Centronics Data Com-

puter Corporation.

■ Hardware initiates and manages automatic negotia-

tion for the fastest protocol available

USS-720

PLL

OSCILLATOR

BUFFER

RAM

CONTROL

AND INTERFACE

LOGIC

IEEE 1284

PARALLEL

PORT

IEEE 1284

HOST

IEEE 1284

BUFFERS

PERIPHERAL

SELECT LOGIC

USB

XCVR

UDC

CORE

USB

PORT

NONVOLATILE

CONFIGURATION

EEPROM

INTERFACE

EXTERNAL SERIAL EEPROM

5-5109a.r6

Figure 1. Block Diagram

Note: Advisories are issued as needed to update product information. When using this data sheet for design purposes, please contact

your Lucent Technologies Microelectronics Group Account Manager to obtain the latest advisory on this product.

Lucent Technolgies Inc.

5-1

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

Table of Contents

Contents

Page Contents

Page

Features ................................................................. 5-1

Description .............................................................. 5-1

Pin Information ....................................................... 5-3

Overview ..................................................................5-5

USB Port ................................................................. 5-5

Device Descriptor, Conﬁgurations, and

Standard Mode (000) ........................... 5-14

Bidirectional Mode (001) ...................... 5-14

Compatibility Mode (010) ..................... 5-14

ECP Mode (011) .................................. 5-14

EPP Mode (100) ................................... 5-14

Registers........................................................ 5-15

Data Register ....................................... 5-16

Status Register ..................................... 5-16

Control Register ................................... 5-17

EPP Address Register ......................... 5-18

EPP Data Register ............................... 5-18

ECP Command Register ..................... 5-19

Extended Control Register .................. 5-20

USS-720 Control Register .................... 5-21

USS-720 Setup Register ...................... 5-22

Interrupts........................................................ 5-23

nAck Interrupt ....................................... 5-23

EPP Time-Out Interrupt ........................ 5-23

nFault Interrupt ..................................... 5-23

Bulk In Interrupt .................................... 5-23

Bulk Out Interrupt ................................. 5-23

Change Interrupt .................................. 5-23

Disconnect Interrupt ............................. 5-23

External Circuitry Requirements .......................... 5-24

Filter Bypass Mode .............................................. 5-25

High Drive Mode .................................................. 5-25

Self-Powered Mode ............................................. 5-25

Absolute Maximum Ratings ................................. 5-25

Electrical Characteristics ..................................... 5-26

Timing Characteristics ......................................... 5-27

Outline Diagram .................................................... 5-28

44-Pin MQFP................................................. 5-28

Ordering Information ............................................. 5-28

Interfaces..........................................................5-5

Supported Descriptors .............................5-5

Descriptor Locations.........................................5-5

Onboard Device Descriptor ..............................5-6

Conﬁguration Descriptor...................................5-7

Interface Descriptors.........................................5-8

Interface 0, Alternate Setting 0

(I0:A0) .....................................................5- 8

Interface 0, Alternate Setting 1

(I0:A1) ..................................................... 5-9

Interface 0, Alternate Setting 2

(I0:A2) ................................................... 5-10

Pipes...............................................................5-11

Control Pipe .......................................... 5-11

Bulk In Pipe ........................................... 5-11

Bulk Out Pipe ........................................ 5-11

Interrupt Pipe ........................................ 5-11

Interpipe Synchronization ..................... 5-11

Requests ........................................................5-11

Standard Requests.........................................5-11

Printer Class-Speciﬁc Requests.....................5-12

GET_DEVICE_ID .................................. 5-12

GET_PORT_STATUS ........................... 5-12

SOFT_RESET ...................................... 5-12

Vendor-Speciﬁc Requests ..............................5-13

GET_1284_REGISTER ........................ 5-13

SET_1284_REGISTER ......................... 5-13

IEEE 1284 Port ..................................................... 5-14

5-2

Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Pin Information

44 43 42 41 40 39 38 37 36 35 34

TST_RST

RESET

TEST

PDATA[1]

PDATA[2]

VDD5

PDATA[3]

PDATA[4]

GND

VDD

TOP VIEW

DMNS

PDATA[5]

DPLS

PDATA[6]

VDD5

PLL_VSS

PLL_VDD

SCAN_EN

SCAN

PDATA[7]

NAUTOFD

12 13 14 15 16 17 18 19 20 21 22

5-5429.r4

Note: An N before symbol names indicates active-low.

Figure 2. Pin Diagram

Table 1. Pin Descriptions

Symbol*

PDATA[1]

PDATA[2]

VDD5

Type

Name/Description

I/O Parallel Port Data Signal Bit 1.

I/O Parallel Port Data Signal Bit 2.

5 V Power Supply for 5 V Parallel Port Signals.

PDATA[3]

PDATA[4]

GND

I/O Parallel Port Data Signal Bit 3.

I/O Parallel Port Data Signal Bit 4.

Ground.

PDATA[5]

PDATA[6]

I/O Parallel Port Data Signal Bit 5.

I/O Parallel Port Data Signal Bit 6.

* An N before symbol names indicates active-low.

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USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

Pin Information (continued)

Table 1. Pin Descriptions (continued)

Symbol*

VDD5

Type

Name/Description

5 V Power Supply for 5 V Parallel Port Signals.

PDATA[7]

NAUTOFD

NSELECTIN

NINIT

I/O Parallel Port Data Signal Bit 7.

Parallel Port nAutoFd Signal (Active-Low).

Parallel Port nSelectIn Signal (Active-Low).

Parallel Port nInit Signal (Active-Low).

Parallel Port nAck Signal (Active-Low).

Parallel Port Busy Signal.

NACK

BUSY

VDD

3.3 V Power Supply.

GND

Ground.

PERROR

SELECT

NFAULT

CLK_LO

CLK_HI

SCAN

Parallel Port PError Signal.

Parallel Port Select Signal.

Parallel Port nFault Signal (Active-Low).

Clock Low. Crystal or CMOS input.

Clock High. Crystal or no connection.

Scan. This signal is only used for production testing. Tie to GND for normal opera-

tion.

SCAN_EN

Scan Enable. When high, internal chip scan is enabled. This signal is only used for

production testing. Tie to GND for normal operation.

PLL_VDD

PLL_VSS

DPLS

3.3 V Analog Power Supply for PLL.

Analog Ground for PLL.

I/O USB DPLS Signal.

DMNS

VDD

I/O USB DMNS Signal.

3.3 V Power Supply.

Ground.

GND

TEST

Test. This signal is only used for production testing. Tie to GND for normal opera-

tion.

RESET

Reset. This signal is only used for production testing. Tie to GND for normal opera-

tion.

TST_RST

Test Reset. This signal is only used for production testing. Tie to GND for normal

operation.

Serial ROM Clock.

Serial ROM Chip Select.

DIO

I/O Serial ROM Data Signal.

37 NUSB_RESET

USB Reset (Active-Low). Indicates USB reset condition.

3.3 V Power Supply.

VDD

GND

Ground.

SUSPEND

PLH

Suspend. Indicates USB bus in suspend.

Parallel Port Peripheral Logic High Signal.

Parallel Port Host Logic High Signal.

Parallel Port nStrobe Signal (Active-Low).

HLH

NSTROBE

PDATA[0]

I/O Parallel Port Data Signal.

* An N before symbol names indicates active-low.

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Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

■ Endpoint. The USS-720 supports the following end-

points:

Overview

— Control endpoint. Accessible as endpoint 0 in all

three alternate interface settings.

— Bulk Out endpoint. Accessible as endpoint 1 in all

three alternate interface settings.

— Bulk In endpoint. Accessible as endpoint 2 in

alternate interface settings 1 and 2.

— Interrupt endpoint. Accessible as endpoint 3 in

alternate interface setting 2.

The USS-720 creates a bridge between one USB port

and one IEEE 1284 enhanced parallel port. Internally,

the USS-720 contains an integrated USB transceiver, a

USB device controller (UDC) core, an IEEE 1284 core,

integrated IEEE 1284 buffers, storage for USB conﬁgu-

ration data, data buffers, and control logic to tie the

blocks together. The USS-720 also contains an

onboard oscillator, PLL, and reset block for single-chip

operation.

■ String.

In use, the USB port of the USS-720 is connected via a

USB cable to a host computer or the downstream port

of a USB hub. Host software sends commands and

data to the USS-720 and receives status and data from

the USS-720 using the USB protocol.

Descriptor Locations

Descriptor data is supplied from an external ROM or

other device. The USS-720 provides support for

93CS56 and 93CS66 EEPROM interfaces.

The IEEE 1284 enhanced parallel port of the device is

connected to a peripheral device. If the peripheral is

IEEE 1284 compatible, then the associated features

and communication modes can be used. The USS-720

provides both automatic and manual operation of the

IEEE 1284 port.

(Note: Substitution EEPROM components must be pin

and functional compatible with the 93CS56L/66L.

93C56L/66L, 93CS46L, and 93C46L EEPROM parts

will not function correctly with the USS-720.) The for-

mat for the externally supplied descriptor data requires

that the descriptors loaded be preceded by the total

length of the descriptor to be returned. In the case of

the device descriptor, this value would be 0x12, which

is redundant since the descriptor returned is always

0x12 bytes long; the ﬁrst byte of the descriptor would

also be 0x12. The length of the conﬁguration descrip-

tor, however, is not the same as the ﬁrst byte of that

descriptor, since the conﬁguration descriptor and all

associated interface and endpoint descriptors are

returned as a whole.

USB Port

The USB port on the USS-720 is electrically and logi-

cally compliant with the USB Speciﬁcation Revision

1.0.

Device Descriptor, Conﬁgurations, and Inter-

faces

The USS-720 also contains a set of device, conﬁgura-

tion, interface, and endpoint descriptors that may be

used in development and prototyping. Retrieval of the

onboard descriptors will occur if no external descriptor

data is supplied.

Supported Descriptors

■ Device.

■ Conﬁguration.

■ Interface. The USS-720 device supports one inter-

face with three alternate settings.

— Interface 0, alternate settings 0 and 1 are

compliant with the USB Device Class Deﬁnition

for Printing Devices, Release Candidate 1.0.

— Interface 0, alternate setting 2 is a vendor-speciﬁc

interface.

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

USB Port (continued)

The format for the externally supplied data is as shown in Table 2. The addressing for the speciﬁed EEPROM

device is word aligned, so the following restrictions are placed upon the starting locations for the conﬁguration and

string descriptors.

■ The conﬁguration descriptor must start at word address 0x13 (byte address 0x26).

■ String descriptors must start at an address that is aligned on a double-word boundary.

Table 2. Externally Supplied Data Format

Byte Address Word Address

Value

0x00

0x01—0x12

0x26

0x00

—

0x13

0x12

Device descriptor as deﬁned in USB Speciﬁcation Revision 1.0.

Total length of string to be returned in response to a

GET_CONFIGURATION_DESCRIPTOR request.

0x27—0x2F

0x30—???*

—

Conﬁguration descriptor as deﬁned in USB Speciﬁcation Revision 1.0.

Interface and endpoint descriptors to be returned in response to a

GET_CONFIGURATION_DESCRIPTOR request.

Any even word address beyond

the end of the conﬁguration

descriptor return string.

Next address—end of string

descriptor.

Length of string to return in response to a GET_STRING_DESCRIPTOR

request. This address divided by two should be included in the low byte of the

wIndex ﬁeld of the GET_DESCRIPTOR standard command.

String descriptor as deﬁned in USB Speciﬁcation Revision 1.0.

* The question marks (???) indicate that this byte address value is determined for the user’s application based on the above information. The

number is going to vary depending on how the user formats their conﬁguration information.

Note: Tables 3—14 describe the descriptor data contained in the USS-720’s internal ROM. This information can be

used as a guide in creating the externally supplied descriptor data.

Onboard Device Descriptor

There is only one device descriptor for each USB device. This descriptor contains the deﬁnitions of the device class

and the device subclass, among other things.

Table 3. Device Descriptor

Offset

Field

Size Value

Description

0x12 Size of this descriptor in bytes.

0x01 Device descriptor type.

bLength

bDescriptorType

bcdUSB

Byte

Word 0x0100 USB Speciﬁcation release number in BCD.

bDeviceClass

bDeviceSubClass

bDeviceProtocol

wMaxPacketSize0

idVendor

Byte

0x00 Interface speciﬁc. See Tables 6, 8, and 11.

0x08 Maximum packet size for endpoint 0.

Word 0x047E Vendor ID for Lucent Technologies.

Word 0x1001 Product ID.

idProduct

bcdDevice

Word 0x0103 Device release number in BCD.

iManufacturer

iProduct

Byte

0x00 Index of string descriptor describing manufacturer.

0x00 Index of string descriptor describing this product.

0x00 Index of string descriptor describing the device’s serial number.

0x01 Number of possible conﬁgurations.

iSerialNumber

bNumConﬁgurations Byte

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Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

USB Port (continued)

Conﬁguration Descriptor

The USS-720 has one default conﬁguration descriptor. This descriptor has one interface, which has three alternate

settings. The three alternate settings and the endpoints that they support are shown in Table 4.

Table 4. Alternate Settings and Supported Endpoints

Endpoint

Interface

Alternate Setting 0

Alternate Setting 1

Alternate Setting 2

Control Pipe

Bulk Out Pipe

Bulk In Pipe

Interrupt Pipe

Endpoint Number 0

8 bytes

Endpoint Number 0

8 bytes

Endpoint Number 0

8 bytes

Endpoint Number 1

64 bytes

Endpoint Number 1

64 bytes

Endpoint Number 1

64 bytes

—

Endpoint Number 2

64 bytes

Endpoint Number 2

64 bytes

—

EndpointNumber3

4 bytes

Table 5. Conﬁguration Descriptor

Offset

Field

Size Value

Description

bLength

Byte 0x09 Size of this descriptor in bytes.

Byte 0x02 Conﬁguration descriptor type.

bDescriptorType

bTotalLength

Word 0x004E Number of bytes in this conﬁguration. This includes the conﬁgura-

tion descriptor plus all of the interface and endpoint descriptors.

bNumInterfaces

Byte 0x01 The USS-720 has one interface.

bConﬁgurationValue Byte 0x01 Value to use as an argument to Set Conﬁguration to select this con-

ﬁguration.

iConﬁguration

bmAttributes

Byte 0x00 Index of string descriptor describing this conﬁguration.

Byte 0x80 Conﬁguration characteristics:

Bit

Description

USS-720

Set.

Cleared.

Bus-powered.

Self-powered.

Remote wakeup.

4—0

Reserved, set to 0. Cleared.

MaxPower

Byte 0x31 Maximum power consumption of this conﬁguration. Units are

mA 2; therefore, the value 0x31 is equivalent to 98 mA.

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USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

USB Port (continued)

Interface Descriptors

The USS-720 supports a single interface with three alternate settings.

Interface 0, Alternate Setting 0 (I0:A0)

Table 6. Interface Descriptor, I0:A0

Offset

Field

Size Value

Description

bLength

Byte

0x09 Size of this descriptor in bytes.

0x04 Interface descriptor type.

bDescriptorType

bInterfaceNumber

bAlternateSetting

bNumEndpoints

bInterfaceClass

0x00 Zero-based value identifying the number of this interface.

0x00 Value used to select this alternate interface.

0x01 Number of endpoints used by this descriptor.

0x07 Printer class.

iInterfaceSubClass Byte

0x01 Printer subclass.

bInterfaceProtocol

iInterface

Byte

0x01 Unidirectional interface.

0x00 Index to string describing this interface.

Table 7. Bulk Out Endpoint Descriptor, I0:A0:E1

Offset

Field

Size Value

Description

0x07 Size of this descriptor in bytes.

0x05 Endpoint descriptor type.

bLength

Byte

bDescriptorType

bEndpointAddress

bmAttributes

wMaxPacketSize

bInterval

0x01 This is an Out endpoint, endpoint number 1.

0x02 This is a Bulk endpoint.

Word 0x0040 Maximum data transfer size.

Byte 0x00 Does not apply to bulk endpoints.

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Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

USB Port (continued)

Interface 0, Alternate Setting 1 (I0:A1)

Table 8. Interface Descriptor, I0:A1

Offset

Field

Size Value

Description

0x09 Size of this descriptor in bytes.

0x04 Interface descriptor type.

bLength

Byte

bDescriptorType

bInterfaceNumber

bAlternateSetting

bNumEndpoints

bInterfaceClass

0x00 Zero-based value identifying the number of this interface.

0x01 Value used to select this alternate interface.

0x02 Number of endpoints used by this descriptor.

0x07 Printer class.

iInterfaceSubClass Byte

0x01 Printer subclass.

bInterfaceProtocol

iInterface

Byte

0x02 Bidirectional interface.

0x00 Index to string describing this interface.

Table 9. Bulk Out Endpoint Descriptor, I0:A1:E1

Offset

Field

Size Value

Description

0x07 Size of this descriptor in bytes.

0x05 Endpoint descriptor type.

bLength

Byte

bDescriptorType

bEndpointAddress

bmAttributes

wMaxPacketSize

bInterval

0x01 This is an Out endpoint, endpoint number 1.

0x02 This is a Bulk endpoint.

Word 0x0040 Maximum data transfer size.

Byte 0x00 Does not apply to Bulk endpoints.

Table 10. Bulk In Endpoint Descriptor, I0:A1:E2

Offset

Field

Size Value

Description

0x07 Size of this descriptor in bytes.

0x05 Endpoint descriptor type.

bLength

Byte

bDescriptorType

bEndpointAddress

bmAttributes

wMaxPacketSize

bInterval

0x82 This is an In endpoint, endpoint number 2.

0x02 This is a Bulk endpoint.

Word 0x0040 Maximum data transfer size.

Byte 0x00 Does not apply to Bulk endpoints.

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Preliminary Data Sheet, Rev. 5

September 1999

USB Port (continued)

Interface 0, Alternate Setting 2 (I0:A2)

Table 11. Interface Descriptor, I0:A2

Offset

Field

Size Value

Description

bLength

Byte 0x09 Size of this descriptor in bytes.

bDescriptorType

bInterfaceNumber

bAlternateSetting

bNumEndpoints

bInterfaceClass

Byte 0x04 Interface descriptor type.

Byte 0x00 Zero-based value identifying the number of this interface.

Byte 0x02 Value used to select this alternate interface.

Byte 0x03 Number of endpoints used by this descriptor.

Byte 0xFF Vendor speciﬁc.

iInterfaceSubClass Byte 0x00

—

bInterfaceProtocol

iInterface

Byte 0xFF Vendor speciﬁc.

Byte 0x00 Index to string describing this interface.

Table 12. Bulk Out Endpoint Descriptor, I0:A2:E1

Offset

Field

bLength

Size Value

Description

Byte 0x07 Size of this descriptor in bytes.

Byte 0x05 Endpoint descriptor type.

bDescriptorType

bEndpointAddress Byte 0x01 This is an Out endpoint, endpoint number 1.

bmAttributes

wMaxPacketSize

bInterval

Byte 0x02 This is a Bulk endpoint.

Word 0x0040 Maximum data transfer size.

Byte 0x00 Does not apply to Bulk endpoints.

Table 13. Bulk In Endpoint Descriptor, I0:A2:E2

Offset

Field

bLength

Size Value

Description

Byte 0x07 Size of this descriptor in bytes.

Byte 0x05 Endpoint descriptor type.

bDescriptorType

bEndpointAddress Byte 0x82 This is an In endpoint, endpoint number 2.

bmAttributes

wMaxPacketSize

bInterval

Byte 0x02 This is a Bulk endpoint.

Word 0x0040 Maximum data transfer size.

Byte 0x00 Does not apply to Bulk endpoints.

Table 14. Interrupt Endpoint Descriptor, I0:A2:E3

Offset

Field

bLength

Size Value

Description

Byte 0x07 Size of this descriptor in bytes.

Byte 0x05 Endpoint descriptor type.

bDescriptorType

bEndpointAddress Byte 0x83 This is an In endpoint, endpoint number 3.

bmAttributes

wMaxPacketSize

bInterval

Byte 0x03 This is an Interrupt endpoint.

Word 0x0004 Maximum data transfer size.

Byte 0x01 This pipe should be serviced every frame.

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Preliminary Data Sheet, Rev. 5

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

4 bytes in length. When the Interrupt pipe is enabled by

host software, the host automatically polls the USS-720

once per frame. The USS-720 returns 4 bytes of status

whenever an interrupt condition exists, as described in

the Interrupts section on page 23, and returns nothing

otherwise. This enables the host to detect and react to

parallel port and buffer status changes without explicit

polling.

USB Port (continued)

Pipes

Four pipes are deﬁned: Control, Bulk Out, Bulk In, and

Interrupt.

Control Pipe

The Control pipe is the default pipe, used for USB

setup and control packets. Its maximum packet size is

8 bytes. The Control pipe is also used for class- and

vendor-speciﬁc commands that:

Interpipe Synchronization

With commands and data going to different pipes, and

data potentially being buffered inside the USS-720, it

could be difﬁcult for host software to maintain serializa-

tion of operations on the peripheral. This can be done

by reading the registers to determine the status of the

USS-720. Or, the Interrupt pipe status mechanism

described above can be used to alleviate this problem.

Software can use the port status and buffer status

information thus returned to determine when buffered

data has been sent and when port control commands

have been processed and it is safe to continue. Since

interrupt information is returned to the software auto-

matically and only when it changes, overhead for the

host operating system and driver software is kept low

when using the interrupt pipe as opposed to polling the

registers.

■ Conﬁgure class- and vendor-speciﬁc features.

■ Retrieve Device, Conﬁguration, and String descrip-

tors.

Note: Descriptor data shares the physical buffer used

to transfer Bulk In data. Retrieving this data will

result in the loss of any reverse channel data

currently in the Bulk In buffer.

■ Read and write the parallel port registers.

— Access standard parallel port register set.

— Read/write an address byte from/to the peripheral

in EPP Mode.

— Read/write a data byte from/to the peripheral in

EPP Mode (but multiple bytes can be transferred

more efﬁciently via the Bulk Out pipe).

Requests

■ Read Printer Class Get Device ID data.

Note: This data shares the physical buffer used to

transfer Bulk In data. Retrieving this data will

result in the loss of any reverse channel data

currently in the Bulk In buffer.

The USS-720 can respond to three different types of

requests:

■ Standard USB device requests.

■ Class-speciﬁc requests.

■ Vendor-speciﬁc requests.

Bulk In Pipe

The Bulk In pipe is used to read data bytes from the

peripheral in Automatic Mode and register-based ECP

Mode. Its maximum packet size is 64 bytes. The buffer

used for this pipe is shared with the Control pipe for

descriptor data and IEEE 1284 Device ID string data.

The Control pipe has priority over Bulk In data, so any

data in this buffer when a request is made for descrip-

tor data or IEEE 1284 Device ID string will be lost.

Standard Requests

The USS-720 supports all of the standard device

requests described in Chapter 9, Device Framework, of

the USB Speciﬁcation except Set Descriptor:

■ Clear Feature.

■ Get Conﬁguration.

Bulk Out Pipe

■ Get Descriptor. Direct requests for interface and end-

point descriptors are not supported in the USS-720

and will cause the Control pipe to be stalled.

The Bulk Out pipe is used to send data to the periph-

eral in Automatic Mode and in Compatibility, EPP, or

ECP Register Modes. Its maximum packet size is

64 bytes.

■ Get Interface.

■ Get Status.

■ Set Address.

■ Set Conﬁguration.

■ Set Interface.

■ Set Feature.

5-11

Interrupt Pipe

The Interrupt pipe is used to report changes in parallel

port and buffer status to the host. Interrupt packets are

Lucent Technologies Inc.

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

USB Port (continued)

Printer Class-Speciﬁc Requests

Printer class-speciﬁc requests supported by the USS-720 are listed in Table 15.

Table 15. Class-Speciﬁc Requests

Label

bmRequestType bRequest wValue

wIndex

wLength

Data

GET_DEVICE_ID

10100001B

Conﬁg

Interface and

Maximum IEEE 1284 Device

Index Alternate Setting

Length

Zero

ID String

BYTE

[None]

GET_PORT_STATUS

SOFT_RESET

10100001B

00100011B

Zero

Interface

GET_DEVICE_ID

GET_PORT_STATUS

This request returns an IEEE 1284 Device ID string.

This command is supported by all three alternate inter-

face settings.

This request returns the current status of the printer.

Table 16 deﬁnes the data returned and describes the

format of the status data. This command is only sup-

ported by the two printer class-speciﬁc alternate inter-

face settings (0 and 1). Attempts to issue this

command to interface 0, alternate setting 2 will result in

a stall.

The Device ID is a length ﬁeld followed by a case-

sensitive string of ASCII characters. The ﬁrst 2 bytes

are the length of the sequence, including the two length

bytes. The ﬁrst byte is the most signiﬁcant; length

values of 0000h, 0001h, and 0002h are reserved.

Table 16. Get Port Status Data

Following the two length bytes, the sequence is

composed of a series of keys and values of the form:

Bit

Description

7—6

Reserved, will always read 0.

Paper error.

key: value {, value};

2—0

Select.

repeated for each key. As indicated, each key will have

one value, and may have more than one value. The

minimum necessary keys are MANUFACTURER,

COMMAND SET, and MODEL (case sensitive). These

keys may be abbreviated as MFG, CMD, and MDL.

Each key (and each value) is a string of characters.

Any characters except colon (:), comma (,), and semi-

colon (;) may be included as part of the key or value

string. Any leading or trailing white space in the string

is ignored by the parsing program, but is still counted

as part of the overall length of the sequence.

Not error: 0 = error, 1 = no error.

Reserved, will always read 0.

SOFT_RESET

This request ﬂushes all buffers and resets the Bulk Out

and Bulk In pipes to their default states, and also resets

all parallel port hardware and registers to their default

state. This command is supported in all three alternate

interface settings.

For more details, see IEEE 1284-1994, Section 7.6.

Note: The USS-720 satisﬁes this request by

requesting Device ID data from the attached

IEEE 1284 peripheral. If the peripheral does not

support Device ID, the USS-720 will return a

zero-length data packet to the host.

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Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

USB Port (continued)

Vendor-Speciﬁc Requests

Vendor-speciﬁc requests supported by the USS-720.

Table 17. Vendor-Speciﬁc Requests

Label

bmRequestType bRequest

wValue

wIndex wLength

Data

GET_1284_REGISTER

SET_1284_REGISTER

11000000B

01000000B

Address

Address Data

Zero

[None]

GET_1284_REGISTER

SET_1284_REGISTER

The high byte of the wValue ﬁeld speciﬁes the address

of the register that is to be read. The USS-720

responds by returning the current values in all of the

parallel port registers. This command is only supported

in interface 0, alternate setting 2. Attempts to issue this

command to alternate settings 0 or 1 will result in a

stall.

The wValue ﬁeld speciﬁes the address of the parallel

port register to be written in the high byte and the value

to be written in the low byte. This command is only sup-

ported in interface 0, alternate setting 2. Attempts to

issue this command to alternate settings 0 or 1 will

result in a stall.

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Preliminary Data Sheet, Rev. 5

September 1999

Bidirectional Mode (001)

IEEE 1284 Port

This mode is identical to Standard Mode (000), except

that the direction of the parallel port data lines may be

controlled with the Direction bit in the Control Register.

The IEEE 1284 port on the USS-720 is compliant with

the IEEE 1284-1994 standard. The parallel port oper-

ates in two distinct modes. In fully Automatic Mode, the

IEEE 1284 protocol is implemented completely in hard-

ware. Compatibility Mode, Nibble Mode, and ECP

Mode (with or without RLE compression) are

Compatibility Mode (010)

This mode provides hardware-based Compatibility

Mode data transfers. Data sent to the USS-720 over

the Bulk Out pipe will be transferred automatically to

the peripheral using Compatibility Mode.

supported, with all negotiation, termination, and other

features of the protocol handled transparently by the

hardware. The USS-720 also features a Register

Mode, which presents a standard register interface to

the host. These two modes provide the host with two

distinct operating paradigms. In Automatic Mode, the

host software interacts with the USS-720 as if with a

USB-capable printer; while in Register Mode, the USS-

720 emulates standard PC parallel port hardware. In

the Automatic Mode, the host application software

doesn’t know that the USB data stream is being

converted to IEEE 1284 protocol. In the Register Mode,

it need not know that its interaction with parallel port

registers is actually talking place remotely over a USB

link.

ECP Mode (011)

This mode provides hardware-based ECP Mode data

transfers. To use ECP, the host software should negoti-

ate for ECP Mode via the Control and Status Registers,

then set Mode to 011. At this time, the Compress

Enable bit in the USS-720 Control Register should also

be set appropriately.

EPP Mode (100)

This mode provides hardware-based EPP Mode data

transfers. To use EPP, the host software should negoti-

ate for EPP Mode via the Control and Status Registers,

and then set Mode to 100.

Automatic mode is recommended for almost all appli-

cations. (Note: The drivers included in the Lucent

Technologies USS-720 Evaluation Kit use only Auto-

matic Mode.) Automatic Mode implements all negotia-

tion handshakes automatically for Compatibility, Nibble,

and ECP modes. In Register mode, the user must do

the negotiations manually in software. Register mode

can be useful when implementing a nonstandard

parallel port interface.

EPP mode in the USS-720 has the following data

transfer rate characteristics. Note that the rates are

approximate.

Table 18. Transfer Rates

Direction

UHCI

OHCI

Forward

Reverse

1 Mbyte/s

1 Kbyte/s

250 bytes/s

In its Register Mode of operation, the USS-720 emu-

lates standard host-side parallel port hardware, with

the register accesses being performed remotely over a

USB connection. As in the standard register set, the

interface mode is controlled by the Mode ﬁeld in the

Extended Control Register. The supported modes and

their meanings are given in the Extended Control Reg-

ister section on page 5-20, and operation and required

software interaction for each of the supported modes

are described in the sections that follow.

Because the reverse channel operation is implemented

in the USB Control Pipe, the transfer rates are limited

according to the particular implementation of the host

controller, either UHCI or OHCI.

The high performance of the forward direction in EPP

mode makes it attractive for implementations requiring

little reverse channel trafﬁc.

Standard Mode (000)

In this mode, the parallel port is under full software con-

trol, with no form of hardware assist. Software has

complete control of all parallel port signals. This mode

can be used for negotiations, terminations, proprietary

handshake sequences, etc. As in standard host-side

parallel port hardware, the parallel port data lines are

unidirectional outputs in this mode.

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Preliminary Data Sheet, Rev. 5

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Table 19. GET_1284_REGISTER Data

IEEE 1284 Port (continued)

Byte

Status

Registers

Control

Nine parallel port registers are available to the host.

They are read and written using the

Extended Control

USS-720 Control

Data

EPP Address/Data

USS-720 Setup

GET_1284_REGISTER and SET_1284_REGISTER

vendor-speciﬁc commands described above. The

SET_1284_REGISTER writes a value into a particular

the hardware or have a direct effect on parallel port

control lines. In the case of the EPP Registers, writes

initiate EPP write cycles on the parallel port.

Table 20. Interrupt Pipe Read Data

Byte

Status

Control

Extended Control

USS-720 Control

The GET_1284_REGISTER returns seven register val-

ues: Status, Control, Extended Control, USS-720 Con-

trol, Data, EPP Address/Data, and USS-720 Setup

Registers, in that order (see 19). Register values can

also be read via the Interrupt pipe, which returns the

values of Status, Control, Extended Control, and USS-

720 Control Registers, in that order (see Table 20).

Reads may affect the contents of the registers in one of

two ways. Any register read clears any interrupt status

that may exist at the time of the read. Also, a read tar-

geting the EPP address or EPP Data Register will ini-

tiate the appropriate EPP read cycle on the parallel

port. The value returned will be the address or data

byte read from the peripheral as a result of that read

cycle.

Each of the nine registers are described in detail in

Tables 21—29.

Lucent Technologies Inc.

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

IEEE 1284 Port (continued)

Data Register

Table 21. Data Register

Data Register

Address: 0

Bit

R/W

Symbol

Access

Default

Bit

Symbol

Bit Description

7—0

D7—D0 Data. This register is equivalent to and operates in the same manner as the Data

when Auto Mode is 0 and the Mode ﬁeld in the Extended Control Register is set to

000 or 001. It is always readable. The read value will be the value of the data latched

into the register unless the Mode ﬁeld is set to 001 and the Direction bit in the Control

on the parallel port data lines.

Status Register

Table 22. Status Register

Status Register

Address: 1

Bit

—

Read

Timeout

Read

Symbol

Access

Default

nBusy

Read

nAck

Read

PError

Read

Select

Read

nFault

Read

PLH

Read

Bit

Symbol

Bit Description

nBusy

nAck

PError

Select

nFault

—

Inverted Busy. An inverted version of the parallel port Busy signal.

Parallel Port nAck Signal.

Parallel Port PError Signal.

Parallel Port Select Signal.

Parallel Port nFault Signal.

Reserved.

PLH

Peripheral Logic High. The parallel port PLH signal.

Timeout EPP Time-Out. This bit indicates that a time-out has occurred during an EPP read or

write. If the peripheral fails to respond to an EPP read or write for longer than 10 µs,

this bit will be set and an interrupt will be returned if interrupts are enabled. This bit is

cleared by a read.

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Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

IEEE 1284 Port (continued)

Control Register

Table 23. Control Register

Control Register

Address: 2

Bit

EPP mask

R/W

Direction

R/W

Int enbl

R/W

SelectIn

R/W

AutoFd

R/W

Strobe

R/W

Symbol

Access

Default

HLH

R/W

nInit

R/W

Bit

Symbol

HLH

Bit Description

Host Logic High. The parallel port HLH signal.

EPP mask EPP Time-Out Interrupt Mask. This bit masks the generation of an interrupt upon

time-out of an EPP data or address transfer. Note that in typical host-side parallel port

controller chips, this interrupt condition is grouped with and controlled by the Interrupt

Enable bit in this register; so for exact emulation of typical parallel port hardware, this

bit should always be written with the inverse of the Interrupt Enable bit.

Direction Parallel Port Direction. When the Mode ﬁeld in the Extended Control Register is set

to 001, this bit controls the direction of the parallel port data lines. When set to 0, the

lines are in Output Mode, and when set to 1, they are in Input Mode (see the Data

Mode (011). It has no effect in Modes 000 or 010 (which are unidirectional only), or

100 (where the direction is uniquely determined by the type of access to the EPP

Registers).

Int enbl

Interrupt Enable. This bit enables interrupt generation on nAck events. If this bit is

set, interrupt status will be generated on transitions of nAck from low to high (this

status being reﬂected by the nAck Interrupt bit in the USS-720 Control Register).

SelectIn Inverted nSelectIn. An inverted version of the parallel port nSelectIn signal.

nInit

Parallel Port nInit Signal.

AutoFd

Strobe

Inverted nAutoFd. An inverted version of the parallel port nAutoFd signal.

Inverted nStrobe. An inverted version of the parallel port nStrobe signal.

Lucent Technologies Inc.

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

IEEE 1284 Port (continued)

EPP Address Register

Table 24. EPP Address Register

EPP Address Register

Address: 3

Bit

R/W

Symbol

Access

Default

R/W

Bit

Symbol

Bit Description

7—0

A7—A0 EPP Address. This register is equivalent to and operates in the same manner as the

EPP Address Register in a standard host-side parallel port controller chip. The

on the parallel port. The register is always readable. When the Mode is set to 100, a

read access will initiate an EPP address read transfer on the parallel port, and the

value returned will be the address value read from the peripheral. Reads when not in

Mode 100 will return whatever value has been previously latched, but will not have

any effect on the parallel port.

EPP Data Register

Table 25. EPP Data Register

EPP Data Register

Address: 4

Bit

R/W

Symbol

Access

Default

R/W

Bit

Symbol

Bit Description

7—0

D7—D0 EPP Data. This register is equivalent to and operates in the same manner as the EPP

Data Register in a standard host-side parallel port controller chip. The register is writ-

able when Auto Mode is 0 and the Mode ﬁeld in the Extended Control Register is set

to 100. A write to this register initiates an EPP data write transfer on the parallel port.

The register is always readable. When the Mode is set to 100, a read access will

initiate an EPP data read transfer on the parallel port, and the value returned will be

the data value read from the peripheral. Reads, when not in Mode 100, will return

whatever value has been previously latched, but will not have any effect on the

parallel port.

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Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

IEEE 1284 Port (continued)

ECP Command Register

Table 26. ECP Command Register

ECP Command Register

Address: 5

Bit

Symbol

Access

Default

Write

Bit

Symbol

Bit Description

7—0

C7—C0 ECP Command. This register is equivalent to the ECP Address FIFO Register in a

standard host-side parallel port controller chip, but has some different restrictions on

its usage. The register is writable when Auto Mode is 0 and the Mode ﬁeld in the

Extended Control Register is set to 011 and there is no ECP data in either the Bulk

Out buffers or in the process of being transmitted. Writes to this address in a mode

other than 011 will be ignored; writes while in mode 011 and when the hardware is

busy will generate a NAK. The value written to this register will be transferred to the

peripheral as an ECP command.

Lucent Technologies Inc.

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

IEEE 1284 Port (continued)

Extended Control Register

Table 27. Extended Control Register

Extended Control Register

Address: 6

Bit

Symbol

Mode[2]

Mode[1]

Mode[0]

nAck

interrupt

nFault

interrupt

Bulk In

interrupt

Bulk In

empty

Bulk Out

empty

Access

Default

R/W

Read

Bit

Symbol

Bit Description

7—5

Mode[2:0] Mode. In Register Mode (when Auto Mode is 0), this bit controls the mode of the

parallel port interface. This ﬁeld is equivalent to the Mode ﬁeld in a standard host-side

parallel port controller chip. The supported modes are as follows:

Mode[2:0] Mode

Description

000

001

010

011

100

101

110

111

Standard Mode

Bidirectional Mode

Compatibility Mode Hardware handshaking

ECP Mode

EPP Mode

Reserved

Full software control, data lines are output only

Full software control, data lines are bidirectional

Software negotiations, hardware data transfers

For more information, see the Register-Based Operation section on page 14.

nAck

nAck Interrupt. This bit will be set when the parallel port nAck signal makes a transi-

Interrupt tion from 0 to 1 while the Interrupt Enable bit in the Control Register is set to 1. Inter-

rupt status is cleared by any register read.

nFault

nFault Interrupt. This bit will be set when the parallel port nFault signal makes a tran-

Interrupt sition from 1 to 0 while the nFault Interrupt Mask bit in the USS-720 Control Register

is set to 0. An interrupt will also be generated if the mask bit goes low while nFault is

low. Interrupt status is cleared by any register read.

Bulk In

Bulk In Interrupt. This bit will be set when Bulk In data is available and the Bulk In

Interrupt Interrupt Mask bit in the Control Register is set to 0. This allows software to use the

interrupt pipe to automatically receive notiﬁcation of available Bulk In data rather than

polling with Bulk In requests. Interrupt status is cleared by any register read.

Bulk In

Empty

Bulk In Empty. This bit will be clear when there is Bulk In data available for reading

by the host, and set when there is not.

Bulk Out Bulk Out Empty. This bit will be clear when there is Bulk Out data waiting in the

Empty buffers or in the process of being transmitted over the parallel port, and set otherwise.

5-20

Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

IEEE 1284 Port (continued)

USS-720 Control Register

Table 28. USS-720 Control Register

USS-720 Control Register

Address: 7

Bit

Symbol

Discon.

int mask

Change

int mask

Bulk In

int mask

Bulk Out

int mask

nFault

int mask

Reserved Compress

enable

Auto

mode

Access

Default

R/W

Bit

Symbol

Bit Description

Discon.int Disconnect Interrupt Mask. This bit masks the generation of an interrupt on the

mask

detection of what appears to be a disconnection of the peripheral from the parallel

port. Disconnect is detected when the Peripheral Logic High signal changes from 1 to

0, or when all parallel port lines driven by the peripheral are high for a long period of

time.

Change Change Interrupt Mask. This bit masks the generation of an interrupt on the detec-

int mask tion of a transition on any of the parallel port lines driven by the peripheral.

Bulk In int Bulk In Interrupt Mask. This bit masks the generation of an interrupt when Bulk In

mask

data is available for reading by the host.

Bulk Out Bulk Out Interrupt Mask. This bit masks the generation of an interrupt when the Bulk

int mask Out data path goes empty.

nFault int nFault Interrupt Mask. This bit masks the generation of an interrupt falling edge of

mask

nFault when Mode is set to 011 (ECP Mode).

Reserved Reserved. This bit must always be written to 0.

Compress Compress Enable. This bit enables automatic hardware-based RLE compression of

enable

outgoing data, for use in ECP with RLE Mode. If software desires to use this feature,

this bit should be set before attempting to send data. This bit must be cleared for

proper operation in ECP (without RLE) Mode.

Auto

mode

Auto Mode. Setting this bit puts the chip in fully Automatic Mode. When set, USS-720

can handle all communications with the peripheral with no assistance from software,

and all registers except the USS-720 Control Register are read only. Clearing this bit

enables write access to the other registers and disables all automatic operation,

provided that none has yet taken place.

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

IEEE 1284 Port (continued)

USS-720 Setup Register

Table 29. USS-720 Setup Register

USS-720 Setup Register

Address: 8

Bit

Symbol Reserved Reserved Reserved Reserved Reserved Reserved Filter Software

Filter

Override

Enable

Access

Default

R/W

Bit

Symbol

Bit Description

Reserved

Reserved.

Filter Software Override Filter Software Override. When this bit is set, software can control the

digital ﬁltering of incoming parallel port signals with the Filter Enable bit.

When clear, ﬁlters are controlled by the pull-up or pull-down stage of the

SUSPEND pin. (See Filter Bypass Mode.)

Filter Enable

Filter Enable. Controls digital ﬁltering of incoming parallel port signals

when the Filter Software override bit is set. Setting to 1 enables ﬁltering;

clearing this bit disables ﬁltering.

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Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Interrupt status is reported by the Bulk In Interrupt bit in

the Extended Control Register, as well as the Bulk In

Empty bit in the same register. This interrupt is gener-

ated when there is Bulk In data available for reading by

the host. By enabling this interrupt, the host may use

the automatic polling of the interrupt pipe to receive

notiﬁcation of incoming data, rather than explicitly poll-

ing the Bulk In pipe.

IEEE 1284 Port (continued)

Interrupts

The USS-720 can return interrupt status on the inter-

rupt pipe. Interrupt status may be generated as a result

of one of seven separately maskable conditions. Any

interrupts that are pending will no longer be pending

after a read operation. The individual conditions are

described in the sections that follow.

Bulk Out Interrupt

The Bulk Out interrupt is enabled by setting the Bulk

Out Interrupt Mask bit in the USS-720 Control Register

to 0. Bulk Out empty status is reported via the Bulk Out

Empty bit in the Extended Control Register. This inter-

rupt is generated when the Bulk Out data pipeline goes

completely empty. By enabling this interrupt, the host

may use the automatic polling of the interrupt pipe to

be notiﬁed of the completion of a data transfer, rather

than explicitly polling the Bulk Out Empty bit.

nAck Interrupt

The nAck interrupt is enabled by setting the Interrupt

Enable bit in the Control Register. An interrupt will be

generated whenever nAck transitions from 0 to 1. Inter-

rupt status is indicated by the nAck Interrupt bit in the

Extended Control Register.

EPP Time-Out Interrupt

The EPP time-out interrupt is enabled by setting the

EPP Time-Out Interrupt Mask bit in the Control Regis-

ter to 0. Note that this is a change from typical host-

side parallel port hardware, where interrupts on EPP

time-out conditions are enabled by the Interrupt Enable

bit in the Control Register.

Change Interrupt

The Change interrupt is enabled by setting the Change

Interrupt Mask bit in the USS-720 Control Register to 0.

There is no Interrupt Status bit associated with the

Change Interrupt. This interrupt is generated when any

of the parallel port signal lines driven by the peripheral

(nAck, Busy, nFault, PError, Select, or PLH) change

state.

An EPP time-out occurs when the peripheral fails to

respond to an EPP handshake within the time allowed

by the IEEE 1284 speciﬁcation. If this occurs, there is

no reliable way to determine whether the peripheral is

still functioning or not, or whether the byte in transit was

transferred properly, and it will be up to software to

attempt to recover by resetting the connection or some

other means.

Disconnect Interrupt

The Disconnect interrupt is enabled by setting the Dis-

connect Interrupt Mask bit in the USS-720 Control

ated with the Disconnect interrupt. This interrupt is

generated when the Peripheral Logic High signal

makes a transition from 1 to 0, or when Peripheral

Logic High is 0 and all other parallel port signal lines

driven by the peripheral (nAck, Busy, nFault, PError,

and Select) are high for longer than one second. Either

of these conditions should indicate that the peripheral

has been disconnected from the USS-720.

nFault Interrupt

The nFault interrupt is enabled by setting the nFault

Interrupt Mask bit in the USS-720 Control Register to 0.

Interrupt status is reported via the nFault Interrupt bit in

the Extended Control Register. The interrupt is gener-

ated when in ECP Mode and either the nFault line tran-

sitions from 1 to 0 or the nFault line is low and the

interrupt is unmasked. This may indicate that the

peripheral has reverse data to transmit.

Bulk In Interrupt

The Bulk In interrupt is enabled by setting the Bulk In

Interrupt Mask bit in the USS-720 Control Register to 0.

Lucent Technologies Inc.

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USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

For using the USS-720 in a self-powered device, there

are some additional considerations. The device must

refrain from supplying power through the pull-up

resistor when the device is plugged into an unpowered

bus. The USS-720 device circuit must also ensure that

the DPLS and DMNS lines are in an appropriate state

when the device is powered but not plugged in.

Figure 5 shows an example connection to meet these

requirements.

External Circuitry Requirements

The USS-720 is intended to be a single-chip solution.

As such, the USB transceiver and the IEEE 1284 buff-

ers have been integrated on-chip. External require-

ments include a 3.3 V supply and a 1.5 kΩ ±5% pull-up

resistor for the DPLS pin. If the internal oscillator is

used, a 12 MHz crystal along with bias capacitors are

needed (see Figure 3). If the internal oscillator is not

used, a 12 MHz clock signal should be supplied to

CLK_LO, and CLK_HI should be left unconnected.

1.2 kΩ ± 5% pull-up resistors are needed on all IEEE

1284 signals (except PLH), unless used in the High

Drive Mode (see the following page). A 5 V supply and

USB and/or IEEE 1284 connectors might also be

needed, depending on the application.

+3.3 V

SWITCH ON WHEN VBUS

IS POWERED

1.5 kΩ ±5%

DPLS

24 Ω ±1%

1.5 MΩ

TO INTERNAL

USS-720

TO INTERNAL

USS-720

DMNS

CLK_LO

CLK_HI

24 Ω ±1%

12 MHz

CRYSTAL

1.5 MΩ

15 pF

5-5506a.r4

5-5259.r2

Figure 5. Self-Powered Device Example Connection

Figure 3. External Crystal Connection

Figure 6 shows a USS-720-to-IEEE 1284 parallel port

connection that complies with the IEEE 1284 speciﬁca-

tion. Other connections are also possible. While the

IEEE speciﬁcation requires these resistors, developers

must make their own design decision against the

500 µA suspend mode current requirements required

by the USB speciﬁcation.

Figure 4 shows the normal USS-720 connection to the

USB. Both DPLS and DMNS require 24 Ω ± 1% series

resistors for USB impedance matching. Additionally, a

1.5 kΩ pull-up resistor is required on DPLS for full-

speed/low-speed differentiation.

+3.3 V VDD

+5 V

1.5 kΩ ± 5%

ALL PARALLEL PORT

OUTPUT SIGNALS

1.2 kΩ ±5%

DPLS

24 Ω ±1%

24 Ω ±5%

+5 V

ALL PARALLEL PORT

INPUT SIGNALS

EXCEPT PLH

1.2 kΩ ±5%

DMNS

24 Ω ±1%

PLH

7.5 kΩ ±5%

5-5404.r1

5-5505a.r1

Figure 4. USB Transceiver Connection

(Normal Mode)

Figure 6. USS-720 Connection to IEEE 1284

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Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

this mode, all parallel port signals are constantly driven

by 14 mA totem-pole drivers, rather than with the

normal open-drain drivers. This eliminates the need for

external pull-up resistors on the parallel port signals

(and, if driving another chip on the same board, there

is no need for the 24 Ω impedance matching resistors).

High Drive Mode is enabled by connecting a 20 kΩ

pull-down resistor to the SK line.

Filter Bypass Mode

For embedded applications, the USS-720 IEEE 1284

port can be operated in Filter Bypass Mode. This mode

disables digital ﬁltering of the parallel port signals into

the USS-720, providing a performance improvement.

Note: Since digital ﬁltering is disabled, the parallel port

lines will be susceptible to noise. Do not use this

mode when driving across a cable.

Self-Powered Mode

Filter Bypass Mode is enabled by connecting a 20 kΩ

pull-down resistor to the SUSPEND line.

When using the USS-720 in a self-powered applica-

tion, attach a 5 kΩ pull-up resistor to the CS line. This

causes the correct self-powered status to be reported

in response to a USB Get-Status command.

High Drive Mode

If desired (e.g., for embedded applications), the USS-

720 IEEE 1284 port can operate in High Drive Mode. In

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-

lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess

of those given in the operations sections of this data sheet. Exposure to absolute maximum ratings for extended

periods can adversely affect device reliability.

Table 30. Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Unit

Ambient Operating Temperature Range

Storage Temperature

125

°C

Tstg

VIN

−40

VSS − 0.3

Voltage on Any Pin with Respect to Ground

VDD + 0.3*

* Except for 5 V tolerant buffers where VIN max = VDD5 max + 0.3 V. VIN must never exceed VDD5 + 0.3 V at any time. VDD5 should be selected

to satisfy this condition.

Lucent Technologies Inc.

5-25

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

Electrical Characteristics

Table 31. dc Characteristics (TA = 0 °C to 70 °C, VDD = 3.3 V ± 0.3 V, VSS = 0 V.)

Parameter

Input Voltage:

Symbol

Test Conditions

Min

Typ

Max

Unit

Low

High

V^IL

VIH

—

2.0

—

0.8

—

Output Voltage:

Low

High

VOL

VOH

—

2.4

—

0.4

—

Power Dissipation

25 °C, VDD = 3.3 V

1.65

231

3.3

323.4

3.6

Power Supply Voltage

VDD, VDDA

VDD5

—

5 V environment

3 V environment

4.375

3.3

5.5

3.6

Power Supply Current

IDD

—

0.5

Table 32. USB Transceiver Driver Characteristics

Parameter

Rise and Fall Times:

Symbol

Test Conditions

Min

Max

Unit

OEN = 0, CL = 50 pF

(10%—90%)

(90%—10%)

Rise/Fall Time Matching

Crossover Point

tRFM

VCRS

ZDRV

OEN = 0, CL = 50 pF

OEN = 0

1.3

110

2.0

Output Impedance*

Ω

* The output impedance includes both the external resistor and the transceiver.

The USS-720 is a 3.3 V part, and it has separate pins (VDD5) for power to the IEEE 1284 drivers. Capacitance val-

ues for the USS-720 pins are listed in Table 33.

Table 33. Capacitance Values

Parameter

CLK_LO

Value

Unit

1.0

3.0

CLK_HI

All Other Pins

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Lucent Technologies Inc.

Preliminary Data Sheet, Rev. 5

September 1999

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Timing Characteristics

■ Timing is speciﬁed over the operating range from 0 °C to 70 °C ambient temperature, VDD = 3.0 V to 3.6 V, and

VDD5 = 4.75 V to 5.25 V.

■ All timing is referenced from the rising edge of CLK_LO, with 70 pF output load.

■ Only DIO is required to meet these input setup and hold times for proper operation. For other inputs, meeting the

limit is only required to ensure that the signal will be recognized on the referenced clock edge rather than one

period later.

Table 34. Setup and Hold Input Timing

Parameter

Setup Time

Hold Time

Unit

DIO Setup and Hold

2.9

3.4

Table 35. Clock Characteristics/Miscellaneous Input Timing

Parameter

Symbol

Min

Typical

Max

Unit

Frequency of Operation (CLK_LO)

Clock Period

Duty Cycle

11.976

83.1

—

12.000

83.3

40/60*

12.024

83.5

—

MHz

tcyc

—

* The duty cycle applies to any frequency in the speciﬁed range.

Table 36. Output Delay Timing

Parameter

Min

Max

Unit

PDATA Output Delay

NUSB_RESET Output Delay

SUSPEND Output Delay

SK Output Delay

5.3

6.5

2.6

6.4

—

21.5

17.1

34.6

16.0

75.0

31.6

CS Output Delay

DIO Output Delay

3.6

Table 37. Miscellaneous Output Timing

Parameter

Symbol

Min

Typical

Max

Unit

Frequency of Operation (SK)

Clock Period

390

2.10

—

429

2.33

476

2.56

—

kHz

µs

tcyc

—

Duty Cycle

50/50*

* The duty cycle applies to any frequency in the speciﬁed range.

Lucent Technologies Inc.

5-27

USS-720 Instant USB

USB-to-IEEE 1284 Bridge

Preliminary Data Sheet, Rev. 5

September 1999

Outline Diagram

44-Pin MQFP

Dimensions are in millimeters.

13.20 ± 0.20

10.00 ± 0.20

1.60 REF

0.25

PIN #1 IDENTIFIER ZONE

GAGE PLANE

SEATING PLANE

0.73/1.03

13.20 ±

0.20

DETAIL A

10.00 ±

0.20

0.130/0.230

0.30/0.45

0.20

DETAIL B

DETAIL A

1.95/2.10

DETAIL B

2.35

MAX

SEATING

PLANE

0.10

0.80 TYP

0.25 MAX

5-2111.r11

Ordering Information

Device Code

Package

Comcode

USS720E-DB

44-Pin MQFP

108127085

5-28

Lucent Technologies Inc.

Application Note

February 1999

Typical Circuit Showing the USS-720

Bridging USB to Parallel Port

While the IEEE 1284 speciﬁcation requires these

resistors, developers must make their own design

decisions against the 500 µA suspend mode current

requirements of the USB speciﬁcation. The following

schematic does not show the pull-down resistor on

the PLH signal. The internal pull-down on the USS-

720 can be used for this purpose. Similarly, the pull-

up resistor values may have to be modiﬁed to higher

values than the IEEE 1284 speciﬁcation allows in

order to meet the USB requirements.

Description

The USS-720 can be used in a variety of applica-

tions, such as bus-powered devices, self-powered

devices, hubs, and embedded printer controllers. The

following describes using the device in a bus-

powered application (see attached schematic).

Note: The attached schematic depicts a typical func-

tional circuit using the USS-720 as a bridge

between the USB and a parallel port. Actual

applications may require additional protection

circuitry. The schematic and circuit description

provided in this application note are for refer-

ence purposes only. Neither Lucent nor In-

System Design warrants their suitability for

any particular purpose.

Standard decoupling should be used on the board. It

is recommended that 0.1 µF capacitors are placed

between VCC_5V/VCC and GND and that they are

located as close as possible to the power pins on the

USS-720. Sufﬁcient grounding must be implemented

on the board to ensure proper functionality. A four-

layer board design is recommended with two of the

layers used for power and ground planes.

The USS-720 is a dual-powered chip requiring both

5 V and 3.3 V supplies. The 3.3 V is generated using

a low dropout regulator. The USS-720 must operate

with a USB supply (VBUS) of 4.4 V to 5.25 V. Using a

low dropout regulator ensures a solid 3.3 V supply

even at the lowest limits of the 5 V VBUS. The 5 V

supply is used by the 1284 printer port drivers.

The test and scan signals (pins 23, 24, 31, 32, and

33) are used for functional testing after fabrication

and are tied low during normal operation. It is recom-

mended that typical bypass techniques be used on

the voltage supply pins (see ASIC BYPASS CAPS on

attached schematic).

The USS-720 also requires a 12 MHz ± 0.25%

crystal. In embedded applications, an oscillator

output should be connected to clk_lo (pin 21), and

pin 22 should be left unconnected.

The USS-720 contains a small amount of ROM

space that is used to store descriptor data. This data

is used during the Plug and Play mode in a Microsoft

Windows^†operating system to identify the product.

This onboard ROM data can be used during the ini-

tial development phase, but unique descriptor data

must be provided by the USB peripheral developer

for each design.

The USS-720 requires a 1.5 kΩ pull-up resistor

attached to the DPLS signal to indicate that it is a

high-speed 12 Mbits/s device as per the USB speciﬁ-

cation. There is also a USB differential driver imped-

ance speciﬁcation of 30 Ω to 42 Ω. A 24 Ω series

resistor, when added to the output impedance of the

USS-720 USB drivers, puts the total output imped-

ance in the middle of that range.

A similar driver output impedance requirement is true

for the IEEE* 1284 printer signals. A 24 Ω series

resistor is used on all the 1284 signals that are driven

by the USS-720 to give each signal a total output

impedance of 45 Ω to 55 Ω . The IEEE 1284 speciﬁ-

cation also requires 1.2 kΩ pull-up resistors on all the

printer signals, except PLH. PLH only requires a

7.5 kΩ pull-down resistor.

* IEEE is a registered trademark of The Institute of Electrical and

Electronics Engineers, Inc.

† Microsoft and Windows are registered trademarks of Microsoft

Corporation.

Lucent Technologies Inc.

6-1

Typical Circuit Showing the USS-720

Bridging USB to Parallel Port

Application Note

February 1999

Note: Developers using the USS-720 must use an

external serial EEPROM (or the equivalent) in

their design and create their own hex data ﬁle for

use in programming the EEPROM at their site.

The conﬁguration data stored in this serial

EEPROM is used by the Microsoft host software

during the enumeration to load the appropriate

drivers. Using unique identiﬁcation data in the

EEPROM provides a means for the developer to

ensure that only their software is loaded for use

with their device. Otherwise, the enumeration of

a camera using the USS-720 could cause the

software for a USS-720-based printer to be

loaded, resulting in a system that does not func-

tion correctly.

Description (continued)

Whenever device descriptor data is requested, the

USS-720 drives both control pins CS (pin 35, Serial

ROM Chip Select) and SK (pin 34, Serial ROM Clock).

The USS-720 then looks for a response on DIO

(pin 36, Serial ROM Data Signal). If there is no external

device connected, and no data is present on the DIO

pin, then the descriptor data is taken from the internal

ROM. The USS-720 accesses this data through a

MicroWire* ROM Interface. One method for this is to

use an EEPROM such as the 93CS56L/66L. The USS-

720 Evaluation Kit is speciﬁcally designed for use with

this part. Substitution components must be pin and

functional compatible with the 93CS56L/66L. 93C56L/

66L, 93CS46L, and 93C46L EEPROM parts will not

work. The connection scheme for this device is shown

on the attached schematic. The circuit diagram

See the Device Descriptor, Conﬁgurations, and

Interfaces section in USS-720 USB-to-IEEE

1284 Bridge Data Sheet for more information on

device descriptors.

assumes that a preprogrammed EEPROM is used.

* MicroWire is a registered trademark of Advanced Interconnection

Technology, Inc.

6-2

Lucent Technologies Inc.

Application Note

February 1999

Typical Circuit Showing the USS-720

Bridging USB to Parallel Port

G N D

S K

C S

D I O

t e s R e S B U n _

V C C

G N D

H I K _ C L

_ L K O L C

L T U A n F

E C T S E L

r r o P E e

G N D

V C C

B U S Y

K C n A

T I N n I

E C T S I N n E L

3 4

3 5

3 6

3 7

3 8

3 9

4 0

4 1

4 2

4 3

4 4

2 2

2 1

2 0

1 9

1 8

1 7

1 6

s p u e S n d

P L

H L

1 5

1 4

1 3

1 2

E B O R T n S

D 0

R25

R26

R27

R28

R29

R30

R31

R32

R33

Lucent Technologies Inc.

6-3

Typical Circuit Showing the USS-720

Bridging USB to Parallel Port

Application Note

February 1999

6-4

Lucent Technologies Inc.

Preliminary User Guide, Rev. 2

February 1999

USS-720

USB Device Driver

For more information on the Windows system-level

components, USB architecture, and 1284 hardware,

please refer to:

1 Introduction

This document describes the design and implemen-

tation of USS720.SYS, a Windows* WDM USB driver

developed by In-System Design, Inc. (Note that this

driver was written speciﬁcally to work with the In-

System Design USB Smart Cable. For vendor-

speciﬁc implementations, refer to the “Notes for

Developers” in the Introduction of this Information

Manual.) The purpose of USS720.SYS is to provide

bulk data transfers and a mapping layer for the IEEE^†

1284 registers over the Universal Serial Bus inter-

face.

■ Microsoft Win32 SDK (October 96 or later), avail-

able from Microsoft *.

■ WDM Driver Model Speciﬁcation, available from

Microsoft.

■ WDM USB Driver Speciﬁcation, available from

Microsoft.

■ USB Device Class Deﬁnition for Printing Devices,

from usb.org web site.

■ USS-720 USB-to-IEEE 1284 Bridge Preliminary

Data Sheet (DS98-393CMPR), available from

Lucent Technologies Microelectronics Group.

The purpose of this document is to:

■ Deﬁne how USS720.SYS will interact with the Win-

dows operating system components and the inter-

face layer to other device classes.

■ IEEE Standard Signaling Method for a Bidirectional

Parallel Peripheral Interface for Personal Comput-

ers (IEEE Standard 1284-1994)

■ Provide a guide for using USS720.SYS.

Note: The USS-720’s Automatic Mode is recom-

mended for almost all applications. The drivers

included in the Lucent Technologies USS-720

Evaluation Kit use only Automatic Mode. Auto-

matic mode implements all negotiation hand-

shakes automatically for Compatibility, Nibble,

and ECP modes. In Register Mode, the user

must do the negotiations manually in software.

menting a nonstandard parallel port interface.

Figure 1 provides a point of reference for directions

mentioned in this document.

USB

USS-720 IN

HOST PC

OUTPUT

PERIPHERAL

BULK OUT

BULK IN

INPUT

DRIVER

INPUT

OUTPUT

5-6005.r2

Figure 1. Signal Directions

* Windows and Microsoft are registered trademarks of Microsoft

Corporation.

† IEEE is a registered trademark of The Institute of Electrical and

Electronics Engineers, Inc.

Lucent Technologies Inc.

7-1