EVAL-ADAU1701 MINIZ Writeback Circuit

Hi Dan,

The issue with the evaluation board remains unresolved. Even with a modified design, it has proven quite difficult to keep the power supply high long enough for the writeback sequence to complete.

You can manually complete a writeback by shorting the WB pin. However, in a real system, I think you would need to have some sort of intelligent way of keeping the power supply high when triggering the writeback long enough fort the write operation to complete.

Brett,

Thanks a lot, that explains it! I'll keep asking our hardware team to take look at this problem.

Regards,

Dan

In my ADAU1701 boards I use different WB circuit:

and I never had problems.

Thank you, Adam! This looks like a great solution.

Regards,

Coleman

It is complete schematic diagram for my WriteBack (WB) and Reset (RES) circuit for ADAU1701.

Two screenshot during:

power up (blue - RESET, red - WriteBack),

and power down

Adau has a lot of time to store eeprom data compared to 73us from datasheet.

Dear traxman,

This is a great help! I'll try changing the hardware if it works for my design for I have followed the default WB circuit from the datasheet. Thanks a LOT!

More power to you,

Dan