AN2707 Freescale Semiconductor / Motorola, AN2707 Datasheet - Page 3

• Manufacturer Part Number: AN2707
• Description: Software Drivers for Tango3 RF Transmitter and Romeo2 RF Receiver ICs
• Manufacturer: Freescale Semiconductor / Motorola

Communication Concept
MOTOROLA
Software Drivers for Tango3 RF Transmitter and Romeo2 RF Receiver ICs
Tango3 and Romeo2 allow RF communications in the ISM (Industrial,
Scientific, and Medical) bands 315 MHz, 434 MHz, 838 MHz, and 915 Mhz.
Data rates up to 11 kbits/second are supported. This set of drivers provides a
simple communications protocol to allow transfer of variable length messages
with up to 127 bytes of data. The drivers support creation of networks with
multiple receivers and transmitters.
Figure 1
(each with a Romeo2 receiver) and one remote control (with a Tango3
transmitter). Each receiver is assigned a unique 8-bit identifier (ID). The
transmitter can send messages to each receiver by changing the ID in the
transmitted message. Additional transmitters and receivers could easily be
added to this system.
Remote control unit
transmitter
Freescale Semiconductor, Inc.
•Each receviver has an ID number
•A transmitter can send messages with any ID number
•A transmitter can communicate with any receiver
Keypad
Tango
HC08
MCU
For More Information On This Product,
shows a simple example lighting network with three lighting fixtures
Go to: www.freescale.com
Figure 1. Simple RF Network
receiver
receiver
receiver
Romeo
Romeo
Romeo
Communication Concept
SPI
SPI
SPI
Lamp
Lamp
Lamp
HC08
HC08
HC08
MCU
MCU
MCU
ID = 0x10
ID = 0x20
ID = 0x30
AN2707
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