adau1466Z self-boot faillure

Chri Question

Jul 18, 2018 00:00

Hi all,

I'm using two ADAU1466Z eval board at the same time.

For one, I'm using self boot feature with no problem.

For the second one, with exactly the same sketch, same wiring, I'm unable to use self boot. After a reset or power off then on, no sound, nothing happens.

Do you have any idea of I could test or do to find the mistake?

Many thanks.

Best regards.

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Chri Reply

Aug 17, 2018 00:00

Hi all,
After several tests, it appears that the problem is caused by a too high eeprom write speed.
The datasheet show 10000 kHz. If I use 1000 kHz it works fine.
Best regards.

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DaveThib Reply

Aug 20, 2018 00:00

Hello Chri,

Since you said EEPROM Write Speed, I am assuming that you were having difficulty writing to the EEPROM. Usually the issue can be that the eval board is set to self-boot. What happens is that when the DSP is loaded with the program to pass data through the DSP it performs a reset. Then it is programmed from the USBi. Well, the soft reset also triggers the selfboot from the EEPROM. so there can be a clash and errors happen. Sometimes it can depend on timing so one may work where another does not. So check that the selfboot switch is off when trying to program the EEPROM.

Dave T

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