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

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niravbhatt

Joined: 16 Mar 2009
Posts: 30
Helped: 2
Location: Ahmedabad,India

29 Jul 2009 9:27 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.

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me.iitv29

Joined: 11 Feb 2008
Posts: 1

23 Oct 2009 11:34 Re: USB 2.0:PHY aborted by Link, ULPI I/F Section #3.8.4.2

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.