Part Number: TS3A227E
The microphone has no sound
When I use the probability of the microphone will not sound, why is it so?
Thank you for providing a schematic.
Would you also provide what type of microphone you are using? Some high impedance headsets may have issues with the detection sequence. See this posting for more information
We also need to make sure the detection sequence is being triggered by a high to low transition on the DET_TRIGGER pin.
In the schematic above the there is no way to have the DET_TRIGGER pin pulled low to initiate the detection sequence like the example below.
Here is another post with more detail on how to trigger the detection sequence without using I2C commands.
If there is a mic detected the MIC_PRESENT pin will pull low. Are you able to probe that node?
Let us know if this helps your debug process.
In reply to Adam Torma:
In reply to Ian Wang:
What type of microphone are you using?
If you remove the TS3A227E from the board and short the connection will you get sound? This will help determine if the IC is the issue.
What is the status of the MIC_PRESENT status indicator high or low?
What is the impedance from the SLEEVE and MICP pin?
What is the impedance from RING2 MICP pin?
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