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SFTS Radio Board Interface Manual

Rev 4.1 8/3/11

This document describes how to integrate the SignalFire radio into a system.

The interface to/from the SFTS radio board (SFTS-10) consists of three connectors:

• Power

• Signal

• Programming/Aux

Power

The power interface is a four pin, 2mm center-to-center connector. The pinout is as

follows:

1. Digital Power – Unregulated power that provides the CC1110 power through a

3.3V regulator. Voltage range is 3.5-12VDC at 50mA max.

2. PA Power – Unregulated power that provides the PA power through a 3.3V

regulator. Max current draw is approximately 350mA. 5% duty cycle max. Not

used on 10mW boards (connected to pin 1 on radio board)

3. GND

4. GND

Signal Interface

The signal interface connector is a ten pin, 2mm center-to-center connector. The pinout

is as follows:

1. P0.1 – Analog input 1, Digital I/O. Buffered by 20K/0.1uF

2. P0.0 – Analog input 0, Digital I/O. Buffered by 20K/0.1uF

3. P1.2 – Digital I/O. Unbuffered I/O line from CC1110

4. P1.1 – Green LED – Digital I/O. Unbuffered I/O line from CC1110

5. P1.3 – Digital I/O. Unbuffered I/O line from CC1110

6. P1.5/TX – Digital I/O, UART TX. Unbuffered I/O line from CC1110

7. P1.7 – Digital I/O. Unbuffered I/O line from CC1110

8. P1.4/RX – Digital I/O, UART RX. Unbuffered I/O line from CC1110

9. Regulated 3.3V from radio digital supply

10. P1.6 – Digital I/O. Unbuffered I/O line from CC1110 (GDO1)

Communication Interfaces

USART0-UART, Alt 2 P1.4, P1.5

USART1-SPI, Alt 1 P0.3, P0.4, P0.5

Summary of content (6 pages)

PAGE 1
SFTS Radio Board Interface Manual Rev 4.1 8/3/11 This document describes how to integrate the SignalFire radio into a system. The interface to/from the SFTS radio board (SFTS-10) consists of three connectors: • • • Power Signal Programming/Aux Power The power interface is a four pin, 2mm center-to-center connector. The pinout is as follows: 1. Digital Power – Unregulated power that provides the CC1110 power through a 3.3V regulator. Voltage range is 3.5-12VDC at 50mA max. 2.
PAGE 2
Programming/AUX This is a ten pin connector with 2mm center-to-center spacing. It is arranged in a 5x2 pattern. The pinout is as follows: 1. P2.1/Debug 1 – Programming interface and External Watchdog Reset. Toggled every time SW goes through the main loop for external watchdog reset. Needs to be cycled at least every ½ second. 2. P0.7 – LNA power on SFTS-300. Analog input 7, Digital I/O. Unbuffered I/O line to/from CC1110 on the SFTS-10. 3. P2.
PAGE 3
SPI Interface The radio module is often used as a SPI slave to another application processor. In this case, the following connections must be made from the radio to the AP: Signal Interface Connector Pin 3 (P1.2 SPI1_SS) – SPI slave select aka Chip Select. Input to radio. CS must be asserted before each packet, and must be negated between packets. Pin 5 (P1.3 SPI1_SPCK) – SPI clock. Input to radio. Pin 6 (P1.5 SPI1_MOSI) – SPI Master out, slave in. Input to radio. Pin 7 (P1.7) – Radio Attention.
PAGE 4
APPENDIX - FCC and IC Statements This module may only be used in SignalFire Telemetry end products or products designed by SignalFire for a 3rd party. Changes or modifications not expressly approved by SignalFire Telemetry, Inc could void the user’s authority to operate the equipment. SignalFire Telemetry Inc, Model SFTS-10 This device complies with Part 15 of the FCC Rules.
PAGE 5
Antennas: Linx Nearson SignalFire Model ANT-916-JJB-ST Model S161AM-915 Model 9-4-ANT 50 ohm, ¼ wave, 1dBi 50 ohm, ½ wave, 2.5dBi 50ohm, ½ wave, 5dBi WARNING! FCC and IC Radiation Exposure Statement: This equipment complies with FCC’s and IC’s RF radiation exposure limits set forth for an uncontrolled environment under the following conditions: 1. 2.
PAGE 6
Revision List Date 3/14/08 5/22/08 9/2/08 12/4/08 3/15/09 8/3/11 Rev 1.0 2.0 3.0 3.1 4.0 4.1 Author Scott K. Scott K. Scott K. Scott K. Scott K. Josh S.