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The MSP430 is now programmed with the game demonstration code and ready to operate.
4
PCB Hardware Overview
This chapter provides the default PCB hardware documentation in detail and provides alternate
configurations that the user may want to implement.
4.1
Hardware Overview
The TRF4903 ISM-band transmitter IC operates from 315 MHz to 950 MHz. It has low power consumption
and an operating voltage of 2.2 V to 3.6 V. It features an integer-N PLL synthesizer and supports FSK and
OOK operation. Other features include on-chip clock recovery, brownout detector, and XTAL frequency
trimming in software. See the TRF4903 data sheet (SWRS023) for detailed information on the TRF4903
features.
The TRF4903 demonstration and development kit (MSP-TRF4903-DEMO) provide a stand-alone
demonstration of a unidirectional link using the MSP430F449, the TRF4903 RF transmitter and the
TRF6903 RF transceiver configured as a receiver.
4.2
TRF4903 RF Block Diagram
Figure 3
shows the block diagram of the TRF4903 ISM transceiver IC.
4
PA_OUT
SWRU010A – October 2004 – Revised May 2005
Band-gap
Counter
Brownout
/N Prescaler
Detector
32/33
Output
PA
Divider
1, 2, 3
VCO
VCO_TUNE
Loop Filter
Figure 3. TRF4903 RF Block Diagram
TRF4903 With MSP430 Demonstration and Development Evaluation Kit
DET_LD_DCLK
16
MUX
8
/A-
/Div. CTRL
6
/B-
Counter
PFD
CPs
/Ref
2...255
12
14 CP_OUT
PCB Hardware Overview
Bit Synchronizer
and
Data Clock
24
CLOCK
23
Serial
DATA
22
Interface
STROBE
3
STDBY
2
MODE
Lock
Detect
1
TX_DATA
XTAL
Switch
19
20
9
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