AnsweredAssumed Answered

Kinetis k20 USBHS_PORTSC1.PHCD

Question asked by Michael Brudevold on Jan 8, 2014
Latest reply on Feb 25, 2014 by CarlosCasillas

Which ULPI registers are written (and what are the values) when USBHS_PORTSC1.PHCD is set or cleared?  I am trying to disable all pulls on Dp/Dm pins as I think they are messing up charger detection on our battery charger.  I set the bits in the ULPI transceiver, but after clearing PHCD, the bits that I set are no longer what I set them to (in this case, I wanted to set the opmode to non-driving so that the transceiver tri-states drivers). 

Outcomes