W I R E L E S S
DOCUMENTATION
IA ISM-UGRP
ISM Band Repeater Demo
User Guide
Version 2.0r - PRELIMINARY
IA ISM-UGRP Rev 2.0r 1205
© 2005, Integration Associates, Inc.
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ABOUT THIS GUIDE
The ISM Band Repeater Demo is designed to show the use of Integration's IA4220/IA4221/IA4320/IA4420 chipsets in a
multi-transmitter/receiver environment.
and download the following datasheets:
IA4220 Universal ISM Band Transmitter datasheet:
IA4221 Universal ISM Band Transmitter datasheet:
IA4320 Universal ISM Band Receiver datasheet:
IA4420 Universal ISM Band Transceiver datasheet:
IA4220-DS
IA4221-DS
IA4320-DS
IA4420-DS
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TABLE OF CONTENTS
Demo Kit Contents .................................................................................................................................................1
Overview ...................................................................................................................................................................2
Repeater Demo Description ...................................................................................................................................4
Demo Unit Table of Contents ..................................................................................................................................5
Radio Hardware: IA4220/21 Transmitter Section ............................................................................................. 7
Schematic ..................................................................................................................................................... 8
434 MHz Layouts ......................................................................................................................................... 9
915 MHz Layouts........................................................................................................................................ 10
Radio Hardware: IA4420 Transceiver Section ................................................................................................. 11
Sche.matic: 50 Ohm Repeater Demo (LCD Version) ................................................................................. 12
PCB Layout: 50 Ohm Repeater Demo (LCD Version) ............................................................................... 13
Schematic: 50 Ohm Repeater Demo (Non-LCD Version) ......................................................................... 14
PCB Layout: 50 Ohm Repeater Demo (Non-LCD Version) ....................................................................... 15
Radio Hardware: IA4320 Receiver Section ...................................................................................................... 17
434 MHz Receiver Schematic ................................................................................................................... 18
434 MHz Receiver Layouts ........................................................................................................................ 19
915 MHz Receiver Schematic ................................................................................................................... 20
915 MHz Receiver Layouts ........................................................................................................................ 21
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DEMO KIT CONTENTS
This document describes designs available on the development kit CDROM for the 434 and 915 MHz ISM Repeater Demo.
Also covered are the diagrams for both LCD and non-LCD variants. For further details, please refer to www.integration.com/
evaluation_kits.php or the IA ISM-DKxx CDROM.
IA ISM-UGRP contains the following items:
•
•
•
•
Push Button Demo transmitter board
Two Push Button Demo receiver boards
Repeater Demo board
User Guide
This document is designed to provide as the user guide to all variants of the Repeater Demo. Photographs may differ
depending on version. The photograph above is the 434 MHz LCD version.
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OVERVIEW
The demo’s main objective is to show the IA4420’s capability to monitor multiple frequencies, receive data from an FSK
transmitter, and then re-transmit this data on an another arbitrary frequency to another receiver or transceiver. This
demonstration is designed to show the IA4420 acting as a repeater node.
The Repeater Demo has three main components: the IA4420, which is the system radio, a C8051F311 type 8051
microcontroller, which controls the application, and a 2 line 16 character LCD, which informs the user of the repeater status
(Note)
.
The current version of the Repeater Demo is equipped with a 50 Ohm SMA connector for the antenna.
IA4420
ISM Transceiver
FIFO
TX Latch
SPI Interface
SPI Interface
Physical layer
SW Uart Interface
TX/RX buffer
Packet
Receiver
Packet
Builder
Packet
Transmitter
Repeater function
Scheduler
LCD Interface
Fig. 1 Repeater Block Diagram
Note: LCD only available on some models.
2
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OVERVIEW
The demo uses the developer-friendly features of the IA4420 device. In receive mode the microcontroller reads the received
bytes from the IA4420’s FIFO, and transmits them through the TX latch. This approach dramatically reduces the load on the
micro, because the microcontroller doesn’t have to monitor every bit, only the bytes. This means the timing constraints in
an application can be reduced at least by a factor of eight for both the transmitting and the receiving sides. See the
PROCESSOR ACTIVITY lines on Figure 2, as demonstrated for both the ‘Traditional’ transceiver mode and the Integration
‘FIFO’ mode.
"Traditional"
mode
byte1
DATA CLK
PROCESSOR ACTIVITY
FIFO mode
1
2
3
4
5
RF PACKETS (8bit)
INTERRUPT REQs
PROCESSOR ACTIVITY
FIFO IT level
set to8 bit
FIFO LEVEL STATUS
FIFO empty
Fig 2. Process Activity in FIFO Mode when Compared to a Traditional Mode of Operation
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DESCRIPTION
The frequency configuration of this demo is as follows:
•
One of the Push Button Demo receivers is set to a different frequency than that of the Push Button transmitter.
The other receiver is paired with the frequency of the transmitter.
•
The Repeater demo receiving frequency is set to the frequency of the Push Button demo transmitter.
The Repeater demo transmitting frequency is set to the non-paired Push Button demo receiver’s frequency
Push Button Demo receiver on F1
IA4320
IA4420
uC
IA4220
LCD
Push Button Demo transmitter on F1
IA4320
Repeater Demo transmitter,
receives on F1, transmits on F2
Note: Diagram may differ depending on type.
Push Button Demo receiver on F2
Fig. 3 Repeater Demo Arrangement
After power on, the Repeater Demo continually looks for a valid packet on the receiving frequency. This happens when one
button has been pressed on the Push Button Demo transmitter. At this moment the LED will light up on the paired Push
Button receiver board. After the Repeater Demo (transceiver board) properly receives this packet, it will forward the packet
on its transmitting frequency. At that time, the LED will light up on the non-paired Push Button receiver board, if both of the
Push Button Transmitter and Push Button Receiver are in the range of the Repeater Demo. It should be noted that the
transceiver in this demo adds a small time delay between receiving and transmitting. This is done to prove the transmitter
is not talking directly to the receiver. Depending on the button pressed, a different time delay is implemented.
A packet is valid if it contains the preamble bytes (0xAA), the synchron pattern (0x2DD4), and the data, which corresponds
to the Push Button Demo data structure.
It can be shown that the paired Push Button demo is working alone, but if the Repeater demo is operating, then both the
Push Button Receivers will work, and the RF communication range is significantly bigger than without the Repeater Demo.
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Demo Unit
TABLE OF CONTENTS
Radio Hardware
Stage 1 – IA4220 Transmitter
Stage 2 – IA4420 Transceiver
Stage 3 – IA4320 Receiver
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Radio Hardware
IA4220/21 TRANSMITTER SECTION
Contents
- Schematic
- 434 MHz Layouts
- 915 MHz Layouts
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SCHEMATIC: PUSH BUTTON DEMO TX BOARD
IC2
7
6
5
GND
SO
HOLD\
SCK
SI
SW1
SCK
SI
CS
1
2
3
2
GND
10u
C1
1
D1
CS\
3
WP\
C2
C3
VCC
100p 100n
SO
GND
IC1
1
16
15
14
13
12
11
10
9
SDI
FSK
VDD
IRQ
1
2
SCK
3
4
5
6
7
8
SEL
WS1
RFP
RFN
MOD
VSS
XTL
WS2
WS3
WS4
CLK/SDO
GND
GND
Fig 4. IA4220 434 MHz Push Button Transmitter Schematic
Antenna configuration, along with the configuration/frequency setting commands denote operating frequency.
Examples of the physical board differences can be seen on the following pages. It can be noted from these layouts that
only the antenna is different.
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PCB LAYOUT: 434 MHZ PUSH BUTTON TX BOARD
Fig 5. 434 MHz Push Button Transmitter Board PCB Layout
Fig 6. IA4220 434 MHz Push Button Transmitter Board PCB Assembly Layout
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PCB LAYOUT: 915 MHZ PUSH BUTTON TX BOARD
Fig 7. 915 MHz Push Button Transmitter Board PCB Layout
Fig 8. IA4220 915 MHz Push Button Transmitter Board PCB Assembly Layout
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Radio Hardware
IA4420 TRANSCEIVER SECTION
Contents
- 50 Ohm Transceiver LCD Board
- 50 Ohm Transceiver Non-LCD Board
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SCHEMATIC: 50 OHM REPEATER DEMO
G N D
C 8
C 9
V C C
L 1
L 3
G N D
V C C
Y e l l o w
D 3
G r e e n
D 2
V C C
R e d
D 1
4 , 7 k
R 1 1
4 , 7 k
R 1 0
4 , 7 k
1
2
3
R 9
O N
1
3
1 0 k
R 3
V C C
1 0 0 k
R 8
+
-
B A T T E R Y
R 1
R 2
T h e y a r e n o t m o u n t e d .
V C C
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PCB LAYOUT: 50 OHM REPEATER DEMO (LCD VERSION)
Fig 10. 50 Ohm Repeater Demo PCB Layout
Fig 11. 50 Ohm Repeater Demo IA4420 Transceiver PCB Assembly Layout
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SCHEMATIC: 50 OHM REPEATER DEMO (NON-LCD)
G N D
C 8
C 9
V C C
L 1
L 3
G N D
R e d
D 4
Y e l l o w
D 3
V C C
V C C
G r e e n
D 2
R e d
D 1
V C C
1 0 0 k
R 8
R 1
R 2
V C C
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PCB LAYOUT: 50 OHM REPEATER DEMO (NON-LCD)
Fig 13. 50 Ohm Repeater Demo PCB Layout
Fig 14 50 Ohm Repeater Demo IA4420 Transceiver PCB Assembly Layout
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Radio Hardware
IA4320 RECEIVER SECTION
Contents
- Schematic
- 434 MHz Layouts
- 915 MHz Layouts
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SCHEMATIC: 434 MHZ PUSH BUTTON RX BOARD
GND GND
IC
1
16
15
14
13
12
11
10
9
FCS0
FBS0
FBS1
OUT0
OUT1
OUT2
OUT3
LPDM
FCS3
FCS2
VDD
IN1
C3
C2
C1
2
10u 10n 10p
3
4
5
6
7
8
VDD
IN2
VSS
FCS1
XTL
GND
GND
IA4320
B2430UNI
+
GND
-
G1
GND GND GND GND
GND
Fig 15. Example configuration for the 434 MHz IA4320 in Standalone Mode
Solder resistors R5, R6 according to the following table:
433.36 MHz
434.32 MHz
R5, R6 = 0 Ohm
R5, R6 not present
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PCB LAYOUT: 434 MHZ PUSH BUTTON RX BOARD
Fig 16. 434 MHz Push Button Receiver Board PCB Layout
Fig 17. IA4320 434 MHz Push Button Receiver Board PCB Assembly Layout
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SCHEMATIC: 915 MHZ PUSH BUTTON RX BOARD
VDD
VDD
1
16
15
14
13
12
11
10
9
FCS0
FCS3
FCS2
FCS0
FBS0
FBS1
OUT0
OUT1
OUT2
OUT3
LPDM
FCS3
FCS2
VDD
IN1
IC
C3
C2 C1
10n 10p
2
FCS0
FCS1
FCS2
FCS3
LPDM
10uF
3
4
5
6
7
8
3
3
3
3
3
1
FCS0
GND
IN2
1
FCS1
VSS
FCS1
XTL
FCS1
1
FCS2
LPDM
1
VDD
FCS3
POWER
2
1
VDD=2.2V - 5.5V
1
LPDM
GND GND GND GND
GND
GND
GND
Fig 15. Example configuration for the 915 MHz IA4320 in Standalone Mode
908.64 MHz
916.32 MHz
LPDM=0, FCS0=0, FCS1=0, FCS2=NC, FCS3=0
LPDM=0, FCS0=0, FCS1=0, FCS2=0, FCS3=NC
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PCB LAYOUT: 915 MHZ PUSH BUTTON RX BOARD
Fig 18. 915 MHz Push Button Receiver Board PCB Layout
Fig 19. 915 MHz Push Button Receiver Board PCB Assembly Layout
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This document may contain preliminary information and is subject to change
by Integration Associates, Inc. without notice. Integration Associates
assumes no responsibility or liability for any use of the information
contained herein. Nothing in this document shall operate as an express or
implied license or indemnity under the intellectual property rights of
Integration Associates or third parties. The products described in this
document are not intended for use in implantation or other direct life
support applications where malfunction may result in the direct physical
harm or injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MECHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, ARE OFFERED IN THIS DOCUMENT.
Integration Associates, Inc.
110 Pioneer Way, Unit L
Mountain View, California 94041
Tel: 650.969.4100
Fax: 650.969.4582
©2005, Integration Associates, Inc. All rights reserved. Integration Associates is a trademark of Integration
Associates, Inc. All other trademarks belong to their respective owners.
P694
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