PCM5100A: Adopts three-wire mode, the input end has signal, the output end has no signal

Hi,

After I sent an audio data to the PCM5100A via the I2S, there was no sound from the speaker.

Several key pin configurations are as follows：

I2S:BCK,LRCK,DIN

DEMP:Software reset   FLT:Software reset   XSMT:Software set  OUTR: Connect to speaker

I using an oscilloscope to measure the pin, it is found that the BCK has about 2948Khz and the LRCK has about 92Khz waveform, the former is exactly 32 times that of the latter. The data input pin (DIN) also has a waveform, but the amplitude is only 100mv, is this normal? Data Output pin (OUTR) has no waveform.Does the sampling rate need to take into account the source properties?

What can I do to make the speaker sound? Thanks!

Amy Luo：

您好，

为更加有效地解决您的问题，我们建议您将问题发布在E2E英文技术论坛上，将由资深的英文论坛工程师为您提供帮助。英文论坛对应子论坛链接：

https://e2e.ti.com/support/audio-group/audio/f/audio-forum