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PCB Hardware Overview
4.1
Hardware Overview
4.2
TRF4903 RF Block Diagram
PA_OUT
Serial
Interface
CLOCK
DATA
STROBE
PA
Band-gap
/N Prescaler
/A-
Counter
Loop Filter
Brownout
MODE
/Div. CTRL
8
6
Output
Divider
PFD
CPs
/Ref
/B-
Counter
Lock
Detector
VCO
24
23
22
3
2
1
4
32/33
19
20
XT
AL_SW
XT
AL
14 CP_OUT
12
VCO_TUNE
2...255
1, 2, 3
Detect
Bit Synchronizer
Data Clock
TX_DATA
and
STDBY
MUX
DET_LD_DCLK
16
XTAL
Switch
PCB Hardware Overview
The MSP430 is now programmed with the game demonstration code and ready to operate.
This chapter provides the default PCB hardware documentation in detail and provides alternate
configurations that the user may want to implement.
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 (
) 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.
shows the block diagram of the TRF4903 ISM transceiver IC.
Figure 3. TRF4903 RF Block Diagram
TRF4903 With MSP430 Demonstration and Development Evaluation Kit
SWRU010A – October 2004 – Revised May 2005
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