HUAWEI TECHNOLOGIES CO., LTD.
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4.14 Troubleshooting FM Faults
4.14.1 Circuit Analysis
FM circuit has U100 and U602, and U602 is integration FM IC .PMU in MT6253 output AVDD,
and support FM circuit. MT6253 output GPIO75_FM_32k to U602 used support clock signal.
MT6253 control FM circuit working by serial interface, and FM_ANT connect to earphone port,
use to FM RF input
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