ESC-100
Eight Channel RS-232 Asynchronous
Communications Adapter
for PCI bus
User's Manual
QUATECH, INC.
5675 Hudson Industrial Parkway
Hudson, Ohio 44236
TEL: (330) 655-9000
FAX: (330) 655-9010
http:/ / www.quatech.com
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(c) 1998 - 2004, Quatech, Inc.
NOTICE
The information contained in this document cannot be reproduced in any form
without the written consent of Quatech, Inc. Likewise, any software programs that
might accompany this document can be used only in accordance with any license
agreement(s) between the purchaser and Quatech, Inc. Quatech, Inc. reserves the right
to change this documentation or the product to which it refers at any time and without
notice.
The authors have taken due care in the preparation of this document and every
attempt has been made to ensure its accuracy and completeness. In no event will
Quatech, Inc. be liable for damages of any kind, incidental or consequential, in regard
to or arising out of the performance or form of the materials presented in this document
or any software programs that might accompany this document.
Quatech, Inc. encourages feedback about this document. Please send any
written comments to the Technical Support department at the address listed on the
cover page of this document.
DOS, Windows ME, Windows 2000, Windows 98, Windows 95, Windows NT are trademarks or registered
trademarks of Microsoft Corporation. OS/ 2 is a registered trademark of IBM Corporation. All other
trademarks or registered trademarks are property of their respective owners.
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Declaration of Conformity
Manufacturer's Name:
Quatech Inc.
Manufacturer's Address:
5675 Hudson Industrial Parkway
Hudson, Ohio 44236 (USA)
Application of Council Directive:
89/ 336/ EEC
Standards to which
Conformity is Declared:
* EN50081-1 (EN55022,
EN60555-2, EN60555-3)
* EN50082-1 (IEC 801-2,
IEC 801-3, & IEC 801-4)
Type of Equipment:
Equipment Class:
Product Name:
Information Technology
Equipment
Commercial, Residential, & Light
Industrial
PCI Eight-Channel Serial
Communications Card
Model Number :
ESC-100D/ IND
ESC-100M/ IND
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1 General Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Connector Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.1 "IND" Option --- Surge Suppression Upgrade . . . . . . . . . . . 8
2 Hardware Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Factory Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Enable Scratchpad Register (SPAD, J4) . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Force High-Speed UART Clock (X2, X4, or X8, J1-J3) . . . . . 10
3 Hard w are Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Address Map and Special Registers
. . . . . . . . . . . . . . . . . 12
4.1 Base Address and Interrupt Level (IRQ) . . . . . . . . . . . . . . . . . . . 12
4.2 Enabling the Special Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Interrupt Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Options Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4.1 Enhanced Serial Adapter Identification . . . . . . . . . . . . . . . . . 14
4.4.2 Clock Rate Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Wind ow s Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Windows Millennium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Window s 98 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4 Windows 1995 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.5 Wind ow s N T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.6 Viewing Resources with Device Manager . . . . . . . . . . . . . . . . . . 20
6 DOS and Other Operating Systems
. . . . . . . . . . . . . . . . . . 23
6.1 DOS and other operating systems . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.1 QTPCI.EXE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 OS/ 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 External Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1 ESC-100D Channel Output Configuration . . . . . . . . . . . . . . . . . . 28
8.2 ESC-100M Channel Output Configuration . . . . . . . . . . . . . . . . . 30
9 PCI Resource Map
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10 Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
11 Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
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1 General Information
The Quatech, Inc. ESC-100 provides eight RS-232 asynchronous serial
communication interfaces for IBM-compatible personal computer systems using the
PCI expansion bus. The ESC-100 uses Quatech's new Enhanced Serial Adapter design.
Legacy serial port data rates are limited to a maximum of 115,200 bits per second.
Quatech Enhanced Serial Adapters can achieve data rates as high as 921,600 bits per
second.
As a PCI device, the ESC-100 requires no hardware configuration. The card is
automatically configured by the computer's BIOS or operating system. The eight serial
ports share a single interrupt line and are addressed in a contiguous block of 64 bytes.
A special interrupt status register is provided to help software to manage the shared
interrupt.
The ESC-100's serial ports are using 16750 Universal Asynchronous
Receiver/ Transmitters (UARTs). These UARTs contain hardware buffers (FIFOs) which
reduce processing overhead and allow higher data rates to be achieved. The 16750
contains a 64-byte FIFO and can transmit and receive data at a rate of up to 921,600 bits
per second.
The ESC-100 is supported under several popular operating systems and
environments. Contact the sales department for details on current software offerings.
Most device drivers are available for download from the Quatech world wide web site
at http:/ / www.quatech.com.
1.1 Connector Type
The ESC-100 is available with two different connector schemes, reflected in the
specific model number of the board.
The ESC-100D uses a D-78 connector. A cable is supplied to break each serial
port out into a standard male D-25 connector. All modem control signals are provided
for each serial port.
The ESC-100M uses modular RJ-11 (phone jack style) connectors, one per serial
port. Only six signals are available on the RJ-11 connector. Along with the transmit
(TXD) and receive data (RXD) signals, carrier detect (DCD) and a ground, either the
RTS/ CTS signal pair or the DTR/ DSR signal pair can be connected. The other signal
pair can be connected in a loopback configuration on the board. Optional adapter
cables translate the RJ-11 connectors to D-25 connectors with customer-configurable
pinouts.
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1.2 Features
The standard ESC-100 implements each of its communication channels with a
16750 UART and uses standard line driver and receiver components. For improved
performance and industrial-grade reliability, Quatech offers the following board
upgrades:
1.2.1 "IND" Option --- Surge Suppression Upgrade
The "IND" upgrade provides the protection essential for reliable use in an
industrial environment. Each communication line has a surge suppressor capable of
sustaining up to 40A 20us peak transient surges, a clamping voltage of 30V and a peak
energy dissipation of 0.1 Joules.
Part Number
ESC-100D
ESC-100DIND
IND Option Connector
no
D-78
D-78
yes
ESC-100M
ESC-100MIND
no
yes
RJ-11
RJ-11
Figure 1 --- ESC-100 Product Series Summary
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2 Hardware Configuration
The ESC-100 is automatically configured at boot time by the computer's BIOS or
operating system. There are no required switches or jumpers to set for installation.
This chapter lists a number of optional jumper settings that control various
hardware features. Jumpers J1-J4 are grouped together at the end of the board opposite
the D-78 or RJ-11 connector. Any changes from the factory default should be made
before installing the ESC-100 in the computer.
2.1 Factory Default Configuration
Figure 2 shows the jumper configuration as shipped from the factory, with two
spare jumpers applied in neutral positions. Remove one or both and apply as shown
in following sections to set optional features.
J 1
J 2
J 3
X2
X4
X8
SP AD
J 4
Figure 2 --- Factory default jumper configuration
2.2 Enable Scratchpad Register (SPAD, J4)
In the default configuration, an Interrupt Status Register and an Options Register
(see page 9) replace the scratchpad (base address + 7) of each UART. If the SPAD
jumper is applied as in Figure 3, the UART scratchpad registers are enabled, and the
Interrupt Status Register and the Options Register are not available.
J1
J2
J3
X2
X4
X8
SPAD
J4
Figure 3 --- Enable scratchpad registers
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2.3 Force High-Speed UART Clock (X2, X4, or X8, J1-J3)
These jumpers force an increase of the UART input clock frequency by a factor of
two, four, or eight. This can allow legacy software to use baud rates above 115,200 bits
per second. It is also useful if the serial port device driver does not directly support
setting the higher baud rates through the Options Register (see page 9).
If one of these jumpers is applied, it overrides any value written to the Options
Register to set the clock multiplier by software. The effective baud rate will be either
two, four, or eight times the value for which the UART itself is programmed.
The factory default is none of these jumpers applied, which allows for software
control of the clock multiplier via the Options Register. The Options Register powerup
default is for a standard times-1 clock of 1.8432 MHz for compatibility with standard
serial ports.
J1
J2
J3
J1
J2
J3
X2
X4
X2
X4
X8
X8
SPAD
SPAD
J4
J4
Force times-two clock
Baud rates up to 230.4 kbps
Factory default
software control
J1
J1
J2
J3
X2
X4
X2
X4
J2
J3
X8
X8
SPAD
SPAD
J4
J4
Force times-eight clock
Force times-four clock
Baud rates up to 460.8 kbps
Baud rates up to 921.6 kbps
Figure 4 --- Clock multiplier jumper options
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3 Hard w are Installation
1. Turn off the power of the computer system in which the ESC-100 is to be
installed.
2. Remove the system cover according to the instructions provided by the
computer manufacturer.
3. Make any desired optional jumper setting changes.
4. Install the ESC-100 in any empty PCI expansion slot. The board should be
secured by installing the Option Retaining Bracket (ORB) screw.
5. Replace the system cover according to the instructions provided by the
computer manufacturer.
6. Attach and secure the cable connectors to the desired equipment.
7. Turn on the power of the computer system.
The output of the ESC-100D is a 78-pin D-connector. A cable is provided to
convert the D-78 into eight standard male D-25 connectors with all control signals
provided to each port (RTS, DTR, CTS, DSR, DCD, and RI).
The output of the ESC-100M is eight 6-pin RJ-11 connectors. Optional cables are
available to convert the RJ-11s into male D-25 connectors, with customer-configurable
pinouts.
J 5
AUXIN/AUXOUT
signal selection
J 6
(ESC-100M only)
J 7
J 8
Clock multiplier/
scratchpad select
J 9
J 1 0
J 1 1
J 1
J 2
J 3
J 4
X2
X4
X8
J 1 2
SP AD
Figure 5 --- Jumper/ connector locations
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4 Address Map and Special Registers
This chapter explains how the eight UARTs and special registers are addressed,
as well as the layout of those registers. This material will be of interest to programmers
writing driver software for the ESC-100.
4.1 Base Address and Interrupt Level (IRQ)
The base address and IRQ used by the ESC-100 are determined by the BIOS or
operating system. Each serial port uses 8 consecutive I/ O locations. The eight ports
reside in a single block of I/ O space in eight-byte increments, for a total of 64
contiguous bytes, as shown in Figure 6.
Port
I/ O Address Range
Serial 1
Serial 2
Serial 3
Serial 4
Serial 5
Serial 6
Serial 7
Serial 8
Base Address + 0 to Base Address + 7
Base Address + 8 to Base Address + 15
Base Address + 16 to Base Address + 23
Base Address + 24 to Base Address + 31
Base Address + 32 to Base Address + 39
Base Address + 40 to Base Address + 47
Base Address + 48 to Base Address + 55
Base Address + 56 to Base Address + 63
Figure 6 --- Port Address Map
All eight serial ports share the same IRQ. The ESC-100 signals a hardware
interrupt when any port requires service. The interrupt signal is maintained until no
port requires service. Interrupts are level-sensitive on the PCI bus.
The base address and IRQ are automatically detected by the device drivers
Quatech supplies for various operating systems. For cases where no device driver is
available, such as for operation under DOS, Quatech supplies the "QTPCI" DOS
software utility for manually determining the resources used. See page 16 for details.
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4.2 Enabling the Special Registers
The ESC-100 contains two unique registers, an Interrupt Status Register and an
Options Register. These registers are enabled when the SPAD jumper (J4) is removed
(factory default). They replace the UART Scratchpad Register on accesses to register
address 7.
The Interrupt Status Register and Options Register are accessed through the
scratchpad location of any UART. The DLAB bit of the UART (Line Control Register,
bit 7) is used to select between the two registers. The most recent write of a DLAB bit in
any UART selects between the two registers as shown in Figure 7.
Register selected for
DLAB Bit SPAD Jumper
address 7 accesses
0
1
X
removed
removed
applied
Interrupt Status Register
Options Register
Scratchpad Registers
Figure 7 --- DLAB bit selects between special registers
4.3 Interrupt Status Register
The read-only Interrupt Status Register can be used to quickly identify which
serial ports require servicing after an interrupt. Reading the Interrupt Status Register
will return the interrupt status of the entire ESC-100, as shown in Figure 8. The
individual bits are cleared as the interrupting ports are serviced. The interrupt service
routine should ensure that the interrupt status register reads zero before exiting.
Bit
Description
7 (MSB)
Port 8 --- 1 if interrupt pending
Port 7 --- 1 if interrupt pending
Port 6 --- 1 if interrupt pending
Port 5 --- 1 if interrupt pending
Port 4 --- 1 if interrupt pending
Port 3 --- 1 if interrupt pending
Port 2 --- 1 if interrupt pending
Port 1 --- 1 if interrupt pending
6
5
4
3
2
1
0
Figure 8 --- Interrupt Status Register
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4.4 Options Register
The Options Register allows software to identify the ESC-100 as a Quatech
Enhanced Serial Adapter. It also allows software to set the UART clock rate multiplier.
Figure 9 shows the structure of the Options Register.
The powerup default of the Options Register is all bits zero.
Bit
N am e
Description
ID bit 1
7 (MSB)
ID1
6
5
4
3
2
1
0
ID0
ID bit 0
-
(reserved, 0)
-
-
(reserved, 0)
(reserved, 0)
-
(reserved, 0)
RR1
RR0
Clock rate multiplier bit 1
Clock rate multiplier bit 0
Figure 9--- Options Register bit definitions
4.4.1 Enhanced Serial Adapter Identification
The ID bits are used to identify the ESC-100 as a Quatech Enhanced Serial
Adapter. Logic operations are performed such that the values read back from these bits
will not necessarily be the values that were written to them. Bit ID1 will return the
logical-AND of the values written to ID[1:0], while bit ID0 will return their
exclusive-OR.
Software can thus identify a Quatech Enhanced Serial Adapter by writing the ID
bits with the patterns shown in the "write" column of Figure 10, then reading the bits
and comparing the result with the patterns in the "read" column. Matching read
patterns verify the presence of the Options Register.
Write
Read
ID1 ID0 ID1 ID0
0
0
1
1
0
1
0
1
0
0
0
1
0
1
1
0
Figure 10 --- ID bit write/ read table
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4.4.2 Clock Rate Multiplier
A standard RS-232 serial port operates at a clock speed of 1.8432 MHz. In order
to achieve higher data rates, Quatech Enhanced Serial Adapters can operate at two
times, four times, or even eight times this standard clock speed. This is controlled by
the clock rate multiplier bits in the Options Register.
Software can determine the UART clock frequency by reading the clock rate
multiplier bits RR1 and RR0 in the Options Register as shown in Figure 11. RR1 and
RR0 can be set by writing to the Options Register if the X2, X4, and X8 jumpers (J1-J3)
are all removed. If one of these jumpers is applied, the RR1 and RR0 bits are forced to
the appropriate value. Reading the Options Register will always return the clock rate
multiplier at which the board is operating.
Clock Rate
Multiplier
UART Clock
Frequency
Maxim u m Data
Rate
RR1 RR0
X1
(default)
X2
0
0
1.8432 MHz
115.2 kbaud
0
1
1
1
0
1
3.6864 MHz
7.3728 MHz
14.7456 MHz
230.4 kbaud
460.8 kbaud
921.6 kbaud
X4
X8
Figure 11 --- Rate Register bit definition
At powerup and reset, the Options Register is initialized to 0. The ESC-100 will
thus powerup in the x1 mode with software control of the clock rate multiplier enabled
as long as the X2, X4, and X8 jumpers are not installed.
Software can control high baud rates through a combination of changing the
clock rate multiplier and the UART baud rate divisor. For example, a baud rate of
230.4 kbps could be achieved by setting the clock rate multiplier to X2 mode (or by
applying the X2 jumper) and setting a software application for 115.2 kbps.
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5 Wind ow s Configuration
5.1 Windows Millennium
1. After inserting the ESC 100 for the first time the "Add New Hardware Wizard"
will begin. Select "Search for the best driver for your device.". Check the "Removable
media" and "Specify location" box. Click the "Next" button.
2. Window will locate the proper INF file and copy the file from the CD. Click
the "Next" button.
3. The final dialog screen will verify the file copy from the diskette. Click the
"Finish" button.
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5.2 Windows 2000
1.
After inserting a ESC-100 for the first time, the "Add New Hardware Wizard
will appear at start up. Click the "OK" button.
2. The following dialog box insert the Quatech COM CD (shipped with the device).
Click the "OK" button.
4.
5.
The following dialog box will display the appropriate INF file on the CD in the
drive. Click the "OK" button.
Window will copy the INF file from the diskette and display a final dialog
indication that the process is complete. Click the "Finish" button.
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5.3 Window s 98
1.
After inserting a ESC-100 for the first time, the "Add New Hardware Wizard
will appear at start up. Click the "Next" button.
2. Select "Search for the best driver for you device". Click the "Next" button.
3.
On the next dialog, select the "CD-ROM DRIVE" check box. Insert the PCI
Communication Drivers CD (shipped with the device) into the CD-ROM.
Click the "Next" button.
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4.
5.
The following dialog box will display the appropriate INF file on the CD in
drive. Click the "Next" button.
Window will copy the INF file from the CD and display a final dialog
indication that the process is complete. Click the "Finish" button.
5.4 Windows 1995
The following instructions provide step-by-step instructions on installing the
ESC-100 in Windows 95 using the "New Hardware Found " wizard.
1. After booting the computer with a newly-installed ESC-100, the "New Hardware
Found" dialog box will appear. If you have never installed a Quatech PCI
communications adapter before, the dialog box may simply indicate that it has
found a "PCI Card."
2. Select the radio button for "Driver from disk provided by hardware
manufacturer." Click the "OK" button to continue.
3. An "Install From Disk" dialog box should pop up. Insert the CD with the
Quatech INF files on it, select the correct drive letter, and click the "OK" button.
Windows 95 automatically browses the root directory for an INF file that defines
configurations for Multi-function Adapters. If no INF files are found, click the
"Browse" button and search the Win95 sub directory on the installation CD. You
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are not required to select the file name. After finding the directory containing
the INF files, Windows 95 will choose the correct file.
4. The "New Hardware Found" dialog box will appear again, this time for an
"Unknown Device."
5. Again select the radio button for "Driver from disk provided by hardware
manufacturer." Click the "OK" button to continue.
6. Another "Install From CD" dialog box will pop up. The path should already be
pointing to the Quatech diskette. Click the "OK" button to continue.
7. You should now see the "Copying Files" dialog box as Windows 95 copies the
driver files from the CD.
8. The installation utility will ask for your Windows 95 installation CD. Serial
communication ports require two drivers supplied by Microsoft to function:
SERIAL.VXD and SERIALUI.DLL. Insert the disk or CD and click "OK".
NOTE:
You may be able to skip this step if you are certain that your system has the
latest version of these files installed. If you do not have your Windows 95
install CD immediately available, click "OK" anyway. A dialog box
appears with an option to Skip the files. Click the Skip button and the files
will not be installed. This is all right if the latest version of these drivers
are currently in the \ WINDOWS\ SYSTEM directory.
9. The "New Hardware Found" dialog will repeat for each of the serial ports on the
ESC-100 as each port is registered with Windows 95.
10. Installation is complete.
5.5 Wind ow s N T
The Windows NT device driver is installed by running the SETUP program. Up
to 256 serial ports are supported. There is a command line-based configuration utility
which is used for adding PCI bus and ISA bus serial ports. Please refer to the
ReadMe.txt file located in the Serial Port Adapters\ Drivers\ Windows NT 4.0 for PCI, PCMCIA, ISA
folder on the Quatech COM CD for complete installation and configuration instructions.
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5.6 Viewing Resources with Device Manager
The following instructions provide step-by-step instructions on viewing
resources used by the ESC-100 in Windows using the "Device Manager" utility. Select
Start| Help from within Windows for additional information on this utility.
1. Double click the "System" icon inside the Control Panel folder. This opens up
the System Properties box.
2. Click the "Device Manager" tab located along the top of the System Properties
box. This lists all hardware devices registered inside the Windows registry.
Additional information is available on any of these devices by click on the
device name and then selecting the "Properties" button.
3. Double click the device group "Multi-function Adapters". The ESC-100 model
name should appear in the list of Multi-function adapters.
4. Double click the ESC-100 model name and a properties box should open for the
hardware adapter.
5. Click the "Resources" tab located along the top of the properties box to view the
resources Windows has allocated for the ESC-100 match the hardware
configuration. Because PCI is a true plug-and-play bus, do not attempt to
modify the configuration values listed. Click "Cancel" to exit without making
changes.
6. The ESC-100 serial ports are also listed under the group Ports (COM and LPT).
Windows does not assign COM1-COM4 to ports addressed at nonstandard
locations. The ESC-100 ports will be enumerated starting with COM5 (or higher)
even if lower logical numbers are available.
7. Select any of the Quatech Serial Ports listed under the group Port (COM and
LPT) and click the "Properties" button. This action opens a properties dialog for
the specific COM port on the ESC-100.
8. Click the "Port Settings" tab and then click the "Advanced" button. The ESC-100
driver will display a custom Advanced Port Settings control, which allows the
ports UART compatibility mode and FIFO threshold levels to be configured.
The threshold values of full-scale for the transmit buffer and 3/ 4-scale for the
receive buffer shown below are optimal for most applications. Note that the
FIFO option for each of the ESC-100's eight ports is configured independently.
9. Use the Logical COM Port names to access the serial ports on your ESC-100
through your software applications. Note: The Logical COM Port name is
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assigned to your ports by Windows 95. This name is required by a Windows 95
application when accessing a particular port.
Windows maintains a registry of all known hardware installed in your
computer. Inside this hardware registry Windows keeps track of all of your system
resources, such as I/ O locations, IRQ levels, and DMA channels. The "Add New
Hardware Wizard" utility in Windows 95 was designed to add new hardware and
update this registry.
An "INF" configuration file is included with the ESC-100 to allow easy
configuration in the Windows 95 environment. Also a custom Windows serial device
driver is included with the ESC-100 to support the use of the 16750 UART's 64 byte
FIFO. Windows uses the "INF" file to determine the system resources required by the
ESC-100, searches for available resources to fill the boards requirements, and then
updates the hardware registry with an entry that allocates these resources.
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6 DOS and Other Operating Systems
6.1 DOS and other operating systems
The ESC-100 is not a direct drop-in replacement for a legacy serial port because
its base address and IRQ cannot be fixed at values such as 3F8 hex, IRQ 4 (COM1) or
2F8 hex, IRQ 3 (COM2), etc. Rather, the system BIOS assigns the address and the IRQ
in a plug-and-play fashion at boot time. Software which is to use the ESC-100 must be
able to accommodate any valid assignments of these resources.
For Windows and OS/ 2 the Quatech device drivers determine what the resource
assignments are and proceed accordingly. In other cases, however, the user must
intervene. The discussion below will center on DOS, but the concepts can be applied to
other operating systems as well.
Many DOS applications support user configuration of the base address and IRQ
of a serial port. Such applications can generally make use of the ESC-100. Older
applications, as well as some custom software, may use hard-coded standard legacy
serial port addresses. These applications will require modifications if they are to use
the ESC-100.
Custom applications for which the customer has source code can be modified to
make just a few PCI BIOS function calls to obtain all the necessary configuration
information. The PCI BIOS specification can be obtained from the PCI Special Interest
Group. Contact Quatech technical support for more information.
6.1.1 QTPCI.EXE
Quatech's "QTPCI" utility supplies the information required when modifying
the serial port settings of the application. This program should be run from real DOS,
not in a Windows DOS box.
Figure 14 shows the Basic Mode display for the ESC-100 after the "Q" key has
been pressed. In this example, the ESC-100 uses I/ O base address FE80 hex and IRQ
11. The hardware revision of the ESC-100 is also displayed. Pressing the "N" key will
show similar information for all non-Quatech PCI devices in the system, including
those devices integrated on the motherboard.
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The QTPCI program is capable only of displaying the PCI configuration. It
cannot be used to make changes.
Quatech PCI Configuration Information Display Software
Version 1.00
INSTRUCTIONS:
------------------------
Press keys listed in the menu at the bottom of the screen.
This program only displays information. It cannot make changes
PCI BIOS detected, version 2.10
Quatech PCI adapters detected
---------------------------------------------
ESC-100D Eight-port RS-232 adapter
Uses IRQ 11
(Hardware Revision A1)
Base addr 1 = 0xfe80
_
I/O
M - Change to Expert Mode
Q - Quatech PCI adapters
N - Other PCI devices
X - EXIT
Figure 14 --- QTPCI.EXE Basic Mode display
Figure 15 shows the Expert Mode display for the ESC-100 after the "Q" key has
been pressed. The information from the Basic Mode display is presented along with
more details such as the Vendor and Device IDs, PCI Class Code, size of memory and
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I/ O regions, etc. Pressing the "N" key will show similar information for all
non-Quatech PCI devices in the system, including those devices integrated on the
motherboard. In this example, the "Base addr 0" resource is reserved.
For users interested in even more details, PCI BIOS information can be
displayed by pressing the "B" key. Pressing the "I" key displays the PCI interrupt
routing table.
Quatech PCI Configuration Information Display Software
Version 1.00
Quatech PCI adapters detected
---------------------------------------------
ESC-100d eight-port RS-232 adapter
Vendor ID 0x135c, Device id 0x0050 found in slot 0x04 on bus 0x00
Device/function code = 0x98, Revision ID = 0x01 (Hardware revision A1)
PCI Class Code = 0x070200 Communications controller, multiport serial
Subsystem Vendor ID 0x135c, Subsystem Id 0x0050
INTA# mapped to IRQ 11 (route 0x61)
Base addr 0 = 0xfc80
Base addr 1 = 0xfe80
_
I/O
I/O
0X80 bytes allocated
0X40 bytes allocated
M - Change to Basic Mode
B - PCI BIOS details
I - Interrupt routing details
Q - Quatech PCI adapters
N - Other PCI devices
X - EXIT
Figure 15 --- QTPCI.EXE Expert Mode display
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7 OS/ 2
The OS/ 2 device driver supports up to 32 serial ports in a system. Installation is
a manual, but simple, process. Please refer to the read me documentation included on
the Quatech COM CD with the device driver for full installation and configuration
details.
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8 External Connections
RS-232-C devices are classified by their function as either Data Terminal
Equipment (DTE) or Data Communication Equipment (DCE). Generally, data terminal
equipment is defined as the communication source and data communication
equipment is defined as the device that provides a communication channel between
two DTE-type devices.
Terminal
DTE
Modem
DCE
RS-232-C
RS-232-C
Telephone
line
Terminal
DTE
Modem
DCE
Figure 16 --- Use of DTEs and DCEs in a communications link
DTE- and DCE-type devices have complementary pinouts to allow terminals
and modems to be connected directly using a one-to-one cable as shown in Figure 17.
In many applications, DCEs are unnecessary, and in these cases a cable called a "null
modem cable" or "modem eliminator cable" is used to directly connect two DTE-type
devices. A typical null modem cable is also shown in Figure 17.
(3)
(2)
(4) RTS
(5)
(20)
(6)
(8)
(22) RI
(7)
(3) RxD
(3)
(2)
(4)
(5)
(20)
(6)
RxD
TxD
TxD (3)
RxD (2)
RxD
TxD
RTS
CTS
DTR
DSR
(2)
(4)
TxD
RTS
(4)
CTS
(5) CTS
(20) DTR
CTS
DTR
DSR
DCD
RTS (5)
DSR (20)
(6)
DTR
DCD (8)
(6)
(8)
DSR
DCD
DCD (8)
(22)
GND (7)
(22) RI
(7)
RI
RI
GND
(22)
(7)
GND
GND
Typical DTE-to-DCE cable
Typical DTE-to-DTE null modem cable
Figure 17 --- Cabling requirements for RS-232-C devices
(cables using 25-pin connectors shown)
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8.1 ESC-100D Channel Output Configuration
The ESC-100D connects to peripheral equipment through a single female D-78
connector, or using the adapter cable, eight male D-25 connectors. The standard serial
port connections are listed in Figure 18. Unlisted pins are not used and not connected.
RS-232
Signal
Descriptio
n
Port 1
Port 2
Port 3
Port 4
D-78 D-25 D-78 D-25 D-78 D-25 D-78 D-25
TxD
RxD
RTS
CTS
DTR
DSR
DCD
RI
21
1
2
3
60
40
41
61
42
62
43
63
44
2
3
26
6
2
3
65
45
46
66
47
67
48
68
49
2
3
2
4
4
7
4
4
22
3
5
5
27
8
5
5
20
6
20
6
20
6
20
6
23
4
28
9
8
8
8
8
24
5
22
7
22
7
29
10
22
7
22
7
GND
RS-232
Signal
Descriptio
n
Port 5
Port 6
Port 7
Port 8
D-78 D-25 D-78 D-25 D-78 D-25 D-78 D-25
TxD
RxD
RTS
CTS
DTR
DSR
DCD
RI
31
11
12
32
13
33
14
34
15
2
3
70
50
51
71
52
72
53
73
54
2
3
36
16
17
37
18
38
19
39
20
2
3
75
55
56
76
57
77
58
78
59
2
3
4
4
4
4
5
5
5
5
20
6
20
6
20
6
20
6
8
8
8
8
22
7
22
7
22
7
22
7
GND
Figure 18 --- ESC-100D Connector Pinouts
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1
2
40
41
42
43
44
45
46
47
48
49
50
51
52
21
22
60
61
3
4
13
12
11
10
9
23
24
62
63
25
24
23
22
21
20
19
18
17
16
15
14
5
6
25
26
27
28
29
30
31
32
33
64
65
66
67
68
69
70
71
72
7
8
8
9
7
10
11
12
13
6
5
4
3
14
53
54
55
56
2
34
35
36
37
38
39
73
74
75
76
77
78
15
16
17
1
D-25 connectors on
the adapter cable
18
19
20
57
58
59
D-78 connector
Dashed lines delineate channels
Pins 25, 30, 35, 64, 69, 74 unused
Figure 19 --- ESC-100D Output Connectors
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8.2 ESC-100M Channel Output Configuration
The ESC-100M connects to peripheral equipment through RJ-11 connectors, or
using the optional adapter cables, male D-25 connectors. When the RJ-11 connector is
converted to a D-25 connector, the adapter cables must be assembled with respect to
either a DTE or DCE configuration. The standard serial port connections are listed in
Figure 20.
DTE connection
DCE connection
RS-232 Signal
Description
RJ-11
D-25
RJ-11
D-25
AuxIn
(CTS)
(DSR)
5
6
4
20
1
1
Transmit Data (TxD)
Carrier Detect (DCD)
Signal Ground
2
3
4
5
2
8
7
3
2
3
4
5
3
8
7
2
Receive Data
AuxOut
(RxD)
(DTR)
(RTS)
20
4
6
5
6
6
Figure 20 --- ESC-100M Connector Pinouts
(Top of board)
13
1
25
12
24
11
2
23
10
22
9
3
21
8
RJ-11 connector pinout
20
19
18
17
16
15
14
4
5
6
7
8
7
6
5
4
3
2
1
2
3
4
5
1
6
D-25 connector
(using adapter cable)
RJ-11 connectors in CN1
Figure 21 --- ESC-100M Output Connectors
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The AUXIN and AUXOUT signals on the RJ-11 connector must be determined as
well. Either CTS or DSR may be received on AUXIN. Either RTS or DTR may be
transmitted on AUXOUT. The decision of which signals to use is made separately for
each channel as shown in Figure 22 below.
The Ring Indicator (RI) signal is tied permanently to DSR.
J5-J12 Output Configuration Jumpers
( ES C - 1 0 0 M ONLY)
(A) Auxiliary control jumpers.
RTS
AUXOUT
DTR
C TS
1
2
4
5
6
J5 - channel 1
J6 - channel 2
J7 - channel 3
J8 - channel 4
J9 - channel 5
AUXIN
J10 - channel 6
J11 - channel 7
J12 - channel 8
DSR
3
1
2
4
RTS
AUXOUT
DTR
C TS
(B) Output configuration:
Transmit RTS
Receive CTS
Loopback DTR - DSR
5
AUXIN
3
6
DSR
1
2
4
5
6
RTS
AUXOUT
DTR
C TS
(C) Output configuration:
Transmit DTR
Receive DSR
Loopback RTS - CTS
AUXIN
3
DSR
1
2
4
5
6
RTS
AUXOUT
DTR
C TS
(D) Output configuration:
Loopback RTS - CTS
Loopback DTR - DSR
Loopback AUXIN - AUXOUT
AUXIN
3
DSR
Figure 22 --- ESC-100M Auxiliary Signal Configuration Jumpers
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9 PCI Resource Map
Listed below are the PCI resources used by the ESC-100. Such information may
be of use to customers writing their own device drivers or other custom software. A
detailed description of the ESC-100's UARTs is available on the Quatech web site.
(all numbers in hex)
PCI Vendor ID:
PCI Device ID:
0x135C
Quatech, Inc.
0x0050
0x0060
ESC-100D
ESC-100M
PCI Class Code
Base class: 0x07
Simple communications controller
Multiport serial controller
Subclass:
Interface:
0x02
0x00
IRQ sourced by:
Base address 0:
Base address 1:
INTA#
0x80 bytes I/ O Reserved region
0x40 bytes I/ O Serial ports
Port 1 at offset 0x00
Port 2 at offset 0x08
Port 3 at offset 0x10
Port 4 at offset 0x18
Port 5 at offset 0x20
Port 6 at offset 0x28
Port 7 at offset 0x30
Port 8 at offset 0x38
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10Specifications
Bus interface
PCI, 32-bit bus, 5-volt only
IBM-compatible computers
Dimensions:
approx. 6.5" x 4.5"
Serial ports
Controller:
Interface:
16750 with 64-byte FIFOs
(ESC-100D)
One female D-78 connector, with eight
male D-25 connectors using supplied
adapter cable
(ESC-100M)
Eight RJ-11 connectors, or eight male
D-25 connectors using optional adapter
cables
Transmit drivers:
High-level output:
Low-level output:
Switching speed
low-to-high:
SN75150 or compatible
+5V min, +8V typical
-5V max, -8V typical
1.4 µs with 2500 pF load
40 ns with 15 pF load
1.5 µs with 2500 pF load
20 ns with 15 pF load
high-to-low:
Receive buffers:
High-level input:
Low-level input:
Switching speed:
MC1489 or compatible
+3V to +13V
-3V to -13V
120 ns typical, 175 ns max
Power requirements
+5
volts:
approx. 260 mA
approx. 35 mA
+/ -12 volts:
Temperature:
operating 0° to 70°
storage -50° to 80°
Humidity:
10% to 90%
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Maximum Load (pF)
Data Rate
(kbaud)
4%
trans
time
N/ A
100
10%
trans trans
time
100
430
15%
20%
trans
time
430
900
1630
4300
25%
trans
time
470
1100
2000
4800
time
300
670
1100
3300
921.6
460.8
230.4
115.2
330
800
900
1570
N ote 1: The signal transition time ratio is defined as the percentage of the unit
interval or bit time (the inverse of the data rate) that is occupied by the signal
transitioning from -3V to +3V. The EIA/ TIA-232-E standard defines a
maximum signal transition time ratio of 4%; most RS-232 receivers will recognize
signal transitions with much larger ratios. With a 4% signal transition time ratio,
EIA/ TIA-232-E is limited to a theoretical data rate of 200 kbaud. If maximum
signal transition time ratio is extended to 10%, 15%, 20%, or even 25%, the
maximum data rate achievable using EIA/ TIA-232-E can be increased past 200
kbaud.
N ote 2: A typical value for capacitance per foot of standard cable is 50 pF/ ft.
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11 Troubleshooting
Listed here are some common problems and frequent causes of those problems.
If the information here does not provide a solution, contact Quatech technical support.
Any unauthorized repairs or modifications will void the ESC-100's warranty.
Computer will not boot up.
1. Is the ESC-100 properly inserted? Remove the card and try again. Perhaps try a
different expansion slot.
2. Ensure that an ISA-bus card is not using the same IRQ that the PCI BIOS tries to
assign to the ESC-100. Most computers have BIOS setup options to reserve IRQs
for either ISA or PCI use. Try reserving the IRQ for the ISA card. The BIOS will
automatically choose a different IRQ for the ESC-100. An address conflict is
unlikely because most PCI-based computers will assign I/ O addresses in such a
way that they cannot conflict with ISA-bus devices.
3. The ESC-100 may be defective. Contact technical support for instructions.
Cannot communicate w ith other equipment.
1. Are the cable connections correct? Are the cables securely attached?
2. Is the software configured with the correct base address and IRQ information for
the ESC-100? (This is mainly a DOS issue.)
3. Is the device driver installed?
4. If you are trying to communicate with another DTE, a null-modem cable will be
required.
5. If possible, use a loopback connector to test the port. This connector needs to
connect the following sets of signals on a D-25 connector:
TxD and RxD (pins 2 and 3)
RTS and CTS (pins 4 and 5)
DCD, DTR, DSR, and RI (pins 8, 20, 6 and 22)
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ESC-100D/ M
User's Manual
Revision 1.30
March 2004
P/ N: 940-0147-130
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