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Part Number: TS3A24157
We are use 24157 to switching 2 pcs WWAN on voice call function.
We found 24157 couldn't clear to isolation the voice.Our block:
MAX9867 (I2S audio codec) and NAU88L24 (I2S audio codec) are connect 1 pcs I2S interface WWAN module, TS3A24157RSER is used switching ALC888S (HDA audio codec) MIC_IN /LINE_OUT that connect MAX9867 MIC_IN /LINE_OUT, or connect NAU88L24 MIC_IN /LINE_OUT
Now issue is 24157 setting low, the ALC888S MIC_IN/LINE_OUT is connect to MAX9867 MIC_IN/LINE_OUT, but if we send voice from NAU88L24, ALC888S also could hear NAU88L24 voice.If 24157 setting high, the ALC888S MIC_IN/LINE_OUT is connect to NAU88L24 的MIC_IN/LINE_OUT, if we send voice from MAX9867, ALC888S will not hear MAX9867 voice.That cross voice phenomenon is if we call to A by the phone, at this time if B call in, the voice will effect A Could you help us check why and how to fix it?
SCHEMATIC1 _ P22 Audio (ALC888S.output-NEW.pdf
SCHEMATIC1 _ P23 MiniPCIE WLAN&.output-New.pdf
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In reply to Fan.Wang:
Actually we have try to pull high 1.6v on NO2, the noise is smaller than before but still could heard. The waveform as below that already pull high 1.6v on NO2
We are open NC1 and NO1, Only to catch NC2/NO2 with COM2 waveform.
scope_47.png is base on NC2 connected, then call the phone from NO2
scope_48.png is base on NO2 connected, then call the phone from NO2
scope_49.png is base on NC2 connected, then call the phone from NC2
scope_50.png is base on NO2 connected, then call the phone from NC2
We surprise on scope_47.png. We could catch NO2 waveform and hear ALC888S (pass through COM2) phone ring, but we couldn't catch COM2 phone ring waveform.I'm not sure it's case from our Oscilloscope or not. Because we can hear phone ring must under the voice is on max state.
In reply to Shu-Cheng LIN:
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