TI中文支持网Hi team,
We used PCM5100A for experiments. The I2S audio signals BCK, LRCK and DIN are inputted to the PCM5100, and the BCK, LRCK, DIN pin Waveform as an attachment, however, there are no outputs.Test VNEG=-3.3,CAPP=1.65V,CAPM=-1.65V.ipq-codec.cI2S_PCM5100A.pdfI2S.rar
Kailyn Chen：
Could you please check the timingofthe XSMT? Please refer to the FIgure 2 of XSMTtiming:
www.ti.com/…/pcm5100a.pdf
shoupo du：
回复 Kailyn Chen:
Hi Kailyn，KailynXSTM non-software control, directly pulled to AVDD 3.3. Reference 9.3.3 XSMT Pin (Soft Mute / Soft Un-Mute) requirements 。
shoupo du：
回复 Kailyn Chen:
Hi Kailyn，
According to the description of 9.3.3, there is timing requirement when XSMT is controlled externally. If there is no XSMT requirement, it is directly connected to AVDD. There is no timing requirement. It is difficult to achieve 20ns timing on the power supply. Is this true?
Kailyn Chen：
回复 shoupo du:
XSMT could beconnected AVDDdirectly, if the system need the mute or unmute timing, the rise or fall time need less than 20ns. If not, there is timing needof XSMT if it connect AVDD directly.
Except XSMT, please check if there is clock error because it could cause PCM5100 entered power down status. For example, if there is any clock halt about SCLK, BCK or LRCK, or if BCK and LRCK remain at a low level for more than 1 second
shoupo du：
回复 Kailyn Chen:
Hi,Kailyn
If not, there is timing need of XSMT if it connect AVDD directly.
—-Does it describe the error here? Is it not timing need .Right?
shoupo du：
回复 Kailyn Chen:
Please provide the driver code！Tks！
