TLV320AIC34: TLV320AIC34IZAS

Hello Emilian, 

Please see datasheet section 9.3.1

best regards,

-steve wilson

Hello Steve
Thank you for your response But this didn't solve my issue.
I will detail the I2C issue:
After reset the second CODEC (CODEC B) is not ready to answer to the address I2C access.
This happened time to time.
To solve this problem I modified the length of the reset pulse from few us to 1ms and everything works fine.
My self I want to understand more to be sure that this fix is consistent.

Best Regards

Emilian,

To be clear, we are talking about the hardware reset, correct?
if you perform a software reset does this still happen?
-Steve wilson

Yes ,is about hardware reset.
I didn't try a software reset since the problem occurs after the initialization of the board.

Regards
Emilian

Emilian,

you mentioned in the first post that the reset pins were not tied together? have you tied tying them together as the datasheet recommends?

explain your procedure and I will attempt to reproduce your problem on the EVM. I have not been able to reproduce your problem yet.

best regards,
-steve wilson

Emilian, I want to check back in with you on this problem. Are you still experiencing difficulties with the reset? please let me know and we can work to resolve your issue.

best regards,
-STeve Wilson

Hello Steve

We just modified the CODEC reset (both reset  are asserted in same time) and I will start the test soon to see if the I2C issue still occurs.

Best Regards

Emilian

ok Emilian! let me know how it goes

best regards,
-Steve wilson

The new fix (both reset are asserted in same time) solve our issue.
Thank you for your help

Emilian

thanks for getting back to me Emilian, I'm glad to hear that your problem is resolved.

best regards,
-Steve wilson