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868.35 MHz
Transceiver Module
Power-up Mode Select (J2)
J2 is used to select the operating mode of the TR8001 device only at power-up. The state of J2 when VCC is applied will determine whether
the board operates in 2G mode or 3G mode. Pin 2 (center pin) of J2 is connected to Pin 19 (CFG) of the TR8001 device and is grounded
for 2G mode and functions as the chip select line for the serial interface in 3G mode. Installing the jumper will either connect the CFG pin
of the TR8001 to GND or directly to the processor for control in 3G mode. See the table below for power-up jumper settings.
Setting
J2(1-2)
J2(2-3)
Power-up Mode
2G
3G
Pin 19
Connected to GND
Connected to Processor
After power-up if 3G mode is selected, pin 15 (3G Sel) must be pulled ‘High’ to initiate the processor to operate in 3G mode. Failure to pull
pin 15 ‘High’ after power-up will cause the processor to remain inactive.
J4
Programming Header (J4)
The programming header allows for custom firmware development for the Silicon Labs C8051F330 if desired. Contact RFM
for more information about custom firmware development.
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148
RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510
?1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
DR8001-071107
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