AnsweredAssumed Answered

Bit Clock accuracy

Question asked by Yehuda Stern on Mar 23, 2016
Latest reply on Apr 12, 2016 by igorpadykov


I'm using 2 TLV320AIC3106 codecs, connected to SSI1 and SSI2, and I recently changed the sampling rate from 44.1KHz to 48KHz.

The sampling rate of one codec is accurate, whereas the other one is always about 1.5% less than expected.

This happens before changing the sampling rate as well as after doing so.

i.e. the previous Bit Clocks of both codecs were: 1.411KHz / 1.39KHz,   and the updated Bit Clocks are:  1.536KHz / 1.511KHz.

This happens although both clocks are originated from the same oscilator, and although both codecs are configured exactly the same.

Is this a silicon or routing issue, or could it be a SW issue?