NXP Semiconductors TWR-RF-SNAP User Manual
© Freescale Semiconductor, Inc. 2011. All rights reserved.
Freescale™ and the Freescale logo are trademarks of
Freescale Semiconductor, Inc. All other product or service names
are the property of their respective owners.
USER’S MANUAL
TWR-RF-SNAP
Document Revision v1.0
© 2011 Synapse, All Rights Reserved
All Synapse products are patented or patent pending
Specifications are subject to change without notice – confirm that data is current
Synapse, the Synapse logo, SNAP, and Portal are all registered trademarks of
Synapse Wireless, Inc.
500 Discovery Drive
Huntsville, Alabama 35806
877-982-7888
Doc # 600049-01A
TWR-RF-SNAP featuing the Synapse Wireless SM700 IEEE 802.15.4 RF Engine
Contents
1 Overview ...................................................................................................................................................... 3
2 Reference Documents .............................................................................................................................. 5
3 Hardware Features ................................................................................................................................... 6
3.1 Using the TWR-RF-SNAP ................................................................................................................................................. 6
Options for Powering the TWR-RF-SNAP Module:
Installing into the Tower System:
3.2 IEEE 802.15.4 RF Engine ................................................................................................................................................. 8
SM700 RF Engine: Synapse Part # SM700PC1
3.3 On-board Sensors, Inputs, and Indicators ................................................................................................................ 9
Temperature Sensor:
Photocell (Light Sensor):
Power Switch:
User LED 1 (Red):
User LED2 (Green):
Power LED:
Switch 2 (software accessible input):
Switch 3 (software accessible input):
Reset Button:
3.4 Expansion Interfaces ...................................................................................................................................................... 10
TWPRI Connector:
UART1 (SNAP UART0):
UART2 (SNAP UART1):
I2C (SNAP I2C):
SPI (SNAP SPI):
ADC:
GPIO Expansion Header:
3.5 SNAP SN132 USB Dongle .............................................................................................................................................. 12
RF100 RF Engine: Synapse Part # RF100P86
Software Features ...................................................................................................................................... 13
3.6 SNAP / SNAPpy ................................................................................................................................................................. 13
SNAP Highlights:
3.7 Synapse Portal IDE .......................................................................................................................................................... 14
Portal Highlights
4 Configuration Settings .......................................................................................................................... 18
4.1 Jumper / Switch Settings .............................................................................................................................................. 18
5 Electromechanicals ............................................................................................................................... 19
5.1 Elevator Connections ..................................................................................................................................................... 19
5.2 Tower Form-Factor ........................................................................................................................................................ 22
TWR-RF-SNAP User’s Manual Page 2 of 22
1 Overview
The Wireless Mesh Networking Tower Board (TWR-RF-SNAP) is a peripheral Tower System Module.
The TWR-RF-SNAP provides wireless mesh networking via the FCC Certified Synapse Wireless SM700
RF Engine. The SM700 is based on the Freescale MC13224 chip which combines a 32-bit ARM7 MCU
with an IEEE 802.15.4 radio transceiver.
The TWR-RF-SNAP module can function standalone or within the Tower System. As part of the Tower
System, the TWR-RF-SNAP can interface with Tower System controller modules via SPI and can access
available Tower System peripheral modules using UART or I2C. The TWR-RF-SNAP also includes a
General Purpose Tower Plug-in (TWRPI) socket allowing direct access to a selection of sensor plug-ins
via I2C.
A SN132 USB Dongle is also included with the TWR-RF-SNAP. The USB Dongle features the RF100 RF
Engine based on a Freescale MC9S08 MCU and the Freescale MC13191 radio. The USB dongle
provides a communication portal to a host computer via USB.
The TWR-RF-SNAP can be accessed in Synapse’s Portal IDE using either the on-board USB or wirelessly
using the included RF100 USB Dongle.
The TWR-RF-SNAP features the following:
Synapse Wireless SM700. A surface-mount RF Engine powered by the Freescale MC13224.
Onboard Sensors / Push Buttons / LEDs for user interaction and feedback
Tower Plug-in (TWRPI) socket for additional sensors
microUSB connector for powering and providing wired access to the Portal IDE
Optional battery connector for untethered operation.
Included SN132 USB Dongle with RF100 RF Engine for wireless access to a host computer
TWR-RF-SNAP User’s Manual Page 3 of 22
Primary Tower Elevator Connector
SM700
Synapse Wireless
802.15.4 RF Engine
TWRPI Socket
GPIO Expansion
Header
USB
Interface
Photocell
Sensor
Temp.
Sensor
PushbuttonsReset
LEDs
microUSB
UART
I2C
SPI
I2C, Analog, GPIO
GPIO
UART
Analog
Analog
Isolation Jumper Block
A block diagram for the TWR-RF-SNAP is shown in the figure below.
Figure 1 - TWR-RF-SNAP Block Diagram
TWR-RF-SNAP User’s Manual Page 4 of 22
An image of the TWR-RF-SNAP with callouts is shown in the figure below.
Figure 2 - TWR-RF-SNAP Image
2 Reference Documents
The documents listed below should be referenced for more information on the Freescale Tower
system and the TWR-RF-SNAP. Refer to http://freescale.com/tower for the latest revision of all
released Tower documentation.
TWR-RF-SNAP Schematics
TWR-RF-SNAP Quick Start Guide
TWR-RF-SNAP Lab Document
TWR-RF-SNAP User’s Manual Page 5 of 22
Power Switch
Position
Operation
Far Left
Draws power from the battery connector
Middle
OFF
Far Right
Draws power from USB Port or Primary
Elevator connector
3 Hardware Features
This section provides more details about the features and functionality of the TWR-RF-SNAP.
3.1 Using the TWR-RF-SNAP
Options for Powering the TWR-RF-SNAP Module:
The module can be powered using any of the following options:
1) USB connector (either via USB AC-power supply or USB port on a PC)
2) The Tower Elevator modules (relying on the 5V supply pins)
3) The battery connector
Power Switch Settings:
Installing into the Tower System:
In additional to functioning standalone, the TWR-RF-SNAP is designed to be used in the Freescale
Tower System. When inserted into the Tower System a Tower MCU module can utilize the TWR-RFSNAP to relay information to additional SNAP nodes, including the provided SN132 USB Dongle. The
TWR-RF-SNAP can also access compatible peripheral modules directly using I2C and SPI.
To ensure proper functionality of the TWR-RF-SNAP within the Tower System the Primary Edge
connector (marked with the white stripe) must be inserted into the Primary Elevator.
The TWR-RF-SNAP is also compatible with the General Purpose Tower Plug-in modules (or TWRPIs). A
TWRPI module can be inserted directly into the available socket on the TWR-RF-SNAP. The TWRPI
socket on the TWR-RF-SNAP provides access to I2C, Analog, and GPIO’s.
TWR-RF-SNAP User’s Manual Page 6 of 22
Figure 3 - Freescale Tower System Overview
TWR-RF-SNAP User’s Manual Page 7 of 22
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