Dear all,
for my audio application, I am using the PCM1681 chip. The codec is driven by an STM32H7 MCU using its embedded SAI Interface. The PCM 1681 is configured using i2c and writing in its register 0x09 the value 0x07 (Left Justified TDM). The desired sampling frequency is 44.1kHz.
As a first test, I am sending the data 0xAA to all slots. I verified that this data is on the DATA1 line and the clock on both BCK and SCK is 11.28MHz. The LRCK seems also to meet the system requirements containing the 8 data slots in it. Clock and data seem to have the correct phase relationship. However, the 8 outputs are stuck to a value of around 2.4V.
Do you have any advice to troubleshoot the problem? Thank you very much