Texas Instruments TRF4903, User Manual, Page: 3 / 26

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2.1 Board Description
Demonstrating a Wireless Link
The demo kit has two circuit boards. The first circuit board (unit) is the transmitter and consists of a
TRF4903 RF transmitter and a MSP430F449 microcontroller. The second circuit board in the kit is a
receiver and consists of a TRF6903 RF transceiver and a MSP430F449 microcontroller. The TRF6903
board is capable of sending and receiving half-duplex wireless data on the European and North
American/US ISM bands. However, for demo purposes, the TRF6903 board is used as a receiver for the
TRF4903 transmitter.
The microcontroller firmware is configured by default to use the 902-MHz to 928-MHz ISM frequency
band. Additional firmware has been developed to operate the TRF4903 demo kit in the European
868-MHz ISM band.See the Operating the TRF4903 Demo Kit in the 868-MHz EU ISM Band application
note (SWRA047) for further information. The firmware for the 868-MHz EU band can be downloaded from
the http://www.ti.com/ismrf website.
Figure 1 shows top-side and back-side views of the transmit TRF4903
circuit board.
TRF4903 With MSP430 Demonstration and Development Evaluation Kit SWRU010A – October 2004 – Revised May 2005 3