This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

PCM1864 EVM only seeing 17 bits of data

Other Parts Discussed in Thread: PCM1864, PCM1865

I have a PCM1864 EVM. I put it into mode 1 with no other changes. It is set up for I2S mode and 24 bits of data by default. I see an LR Clock of 96kHz and a bit clock of 6.144MHz. But I only see the 17 MSBs of 24 bits toggling on the PCM1864 DOUT pin. I have done a number of other experiments including using slave mode, setting a 48kHz sample rate but all cases the 7 LSBs of the 24 bits never toggle, they are always 0. I see the same thing when set up for 20 bits of data. When I set it up for 16 bits of data I see all 16 bits toggling. If I capture the I2S data it looks good. When I feed audio into CH1L and CH1R and play back the captured data it sounds good. But I have not found a way to get the 7 LSBs to do anything. They are always 0. Please help.