Confidential
TMPA8873PSNG /CMNG /CPNG /CRNG /CSNG
2005/03/29
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13. Signal Detection Flags
There are some flags on the READ BUS registers. They indicate that a certain signal is detected at the
moment. But reliability of a detection result is not so accurate if checking only one flag, so that confirming
several flags, which means similar result by each other, at the same time is recommended.
14. Control the Signal Processor
The signal processor is connected with the micro controller by means of internal wiring. All functions of the
signal processor can be controlled through IIC bus, which is a part of the internal connections.
15. Thai mono-bilingual system
Thai mono-bilingual system requires two external sound BPFs(for S1/ S2 carriers) and SW.
Refer to following block diagram. Because two SIF frequencies are very near to each other.
33
SIF out
2nd SIF in
BPF
BPF
31
S2 carrier
S1 carrier
