ADAu1467 can't self-boot from AT25DF321A (EEPROM)

SigmaDSP & SigmaStudio Semi_Tehrani Oct 4, 2018 00:00 2 replies Original on forum ↗

Semi_Tehrani Question

Oct 4, 2018 00:00

Hello,

We needed to have apparently really large size EEPROM for our application. So the designer used "AT25DF321A" which is 32 Mbit SPI flash memory.

The ADAU1467 failed to self-boot successfully when AT25DF321A was attached. the self-boot worked successfully when AT25DF321A replaced with 25AA1024.

I couldn't find any approved EEPROM list for ADAU1467.

I appreciate it if you explain why we have this issue?

Thanks, Semi

Audio Signal Processors

'Thibodeau

adau1467

David

SigmaDSP Audio Processors

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DaveThib Reply

Oct 5, 2018 00:00

Hello Semi,

The AT25DF321A has Sector Protection bits that are set to write protect by default. SigmaStudio is not programmed to clear these bits before writing to the part. This is what I suspect to be the problem. I think there is a work-around and I will experiment with a possible workaround for you.

Dave T

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Semi_Tehrani Reply

Oct 10, 2018 00:00

Hi David,

Decided to move on with 2 Mbit EEPROm instead. the AT25DF321A is too large for ADAU1467 application. Thanks, Semi

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