AM1808 USB communication

Hello G.F,

Apart from advisory 2.1.10, there are two more advisories 2.3.1 & 2.3.3 applicable for USB interface. However these advisories are related to interrupt and RESET timing and would not cause any abnormality in USB communication.

Regards,

Senthil

Hi Senthill,

Thank you for the reply.

It seem that there are a few more advisories for USB0.
Advisory 2.3.25
Advisory 2.3.26
Advisory 2.3.27

Does these advisory would not cause any abnormality in USB communication also?
Because in advisory 2.3.37 it said that XDMA hangs up.

best regards,
g.f.

Hello G.F,

The advisories you were listed may affect the USB communication. All three advisories are related to DMA transactions and software workarounds have to be implemented to overcome these issues.

Regards,
Senthil

Hi Senthil,

Thank you for the reply.

I'm sorry but let me ask again about the advisory which I listed.

My customer is asking if there are advisories which will stop USB communication.
I guess Advisory 2.3.25 doesn't stop the USB communication but CPU just receive old data packet.
Is it correct?

I guess Advisory 2.3.26 and 2.3.27 will affect to the USB communication
but does these advisory stop the USB communication(receive and transmission)?

In advisory 2.3.27, it said that XDMA will hung up.
Does this mean that USB communication stop and
USB controller can not receive the incoming data from outside of AM1808?
I guess USB will keep communicating(won't stop) but received packet will not be transfered to the CPPI FIFO .

best regards,
g.f.

Hi Senthil,

Thank you for the reply.
Yes, I understood that user must implement all the workarounds.
I will tell my customer about the workaround and advisory2.3.27 will stop the USB communication.

best regards,
g.f.

Hello G.F,

Could you please help to close this thread.

Regards,
Senthil

Hi Senthil,

I'm sorry, I forgot to press "Verify Answer".

best regards,
g.f.