STM32H743: QUADSPI internal timing criticality errata

[lucky65]

Hi all,
I am working on a QSPI driver for W25Q512 flash memory (extloader for stm32cubeprogrammer and main firmware driver).

I had a look at the errata ES0392 - Rev 13 and I have a question about paragraph 2.8.4:

2.8.4 - QUADSPI internal timing criticality
---------------
Description
The timing of some internal signals of the QUADSPI peripheral is critical. 
At certain conditions, this can lead to a general failure of the peripheral. 
As these conditions cannot be exactly determined, it is recommended to systematically apply the workaround as described.
...
[omissis]

 

I have applied the suggested patch on the "external loader" driver and there is no particular problem in applying it,  but I have also the "very similar" driver on the main application firmware in processor.

 

Up to now I had no errors in the main firmware qspi driver : read and write are ok also without the patch.

 

Applying the patch on the "main firmware" needs testing and I have to schedule this testing.

Is it possible to have some more details on this "certain conditions" to better evaluate the situation and get less worried about this... ?

Does it mean clock, temperature, ...?

 

Thanks,

best regards

 

Lucio

 

 

[mƎALLEm]

Hello,

I will check internally and get back to you as soon as I have an answer.

 

[mƎALLEm]

Hello,

According to our expert, unfortunately we don't have the exact condition when the issue could happen. It could be the clock, temperature, voltage ... It's linked to a synchronization issue between two clock domains that could be influenced by temperature, clocks, voltage ..

So in any case you need to apply the workaround.

[lucky65]

Hi,

sorry for my late reply.

I applied the suggested workaround ; thanks a lot for your answer .

 

Best regards,

Lucio