USB 2.0:PHY aborted by Link, ULPI I/F Section #3.8.4.2

[niravbhatt]

usb ulpi assertion

Can anybody help me to understand that what are the possible conditions which enables LINK to abort PHY in case of ULPI interface.

More details:
According to the ULPI Rev_1.1, section 3.8.4.2, LINK aborts PHY by asserting STP. LPI PHY will see the STP asserted and abort the transaction from PHY to LINK by deasserting DIR & NXT in the next cycle of STP assertion. It is OK & fine.

But, my question is..... what could be the possible conditions which causes STP assertion from LPI wrapper?

Thanks in advance.

 

[me.iitv29]

In the last paragraph of section 3.8.4.2 it is specifically mentioned "it is primarily provided for the link to shut down a babbling port by disabling the phy."

I hope this would solve your problem.