Pantech PG-1400, Руководство по обслуживанию

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PG-1400 Service Manual
6.6. FM Radio Module
6.6.1 Check point power part in the FM radio mode
CP1 : It is high if system is
turned on
6.6.2 Check point communication part in the FM radio mode
(Initialization, Set Frequency)
CP2 :
3.15MHz clock is generated for initialization of FM radio IC or setting frequency.
If FM_EXT_CLK(3.15MHz) is generated in the early time to operate Radio mode or select frequency,
it is right.
CP3 :
This point is for communication Line(3-wire method) to execute FM radio. Usally, this point activate in the
early time after user select the FM radio mode or frequency band. It is right if clock(FM_CLK) is
generated and data(FM_DATA) and control signal(FM_R_W) transferred.
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