On 12/03/09 14:45, Somebody in the thread at some point said:
Hi Alan -
On 12/2/09, Andy Green<andy@xxxxxxxxxxx> wrote:
It's more a question about what that input on the PHY chip sees during
powerup / reset... it needs to be nicely and definitely high the whole
time so it will ignore what happens then. Is it pulled up, or just
connected to the iMX GPIO? iMX GPIO alone may not be enough. They
mostly default to 100K pullup but even that may not be enabled early in
the powerup action.
The CS_N pin is connected directly to GPIO (PA24) with no pull-up.
A 10K to your IO voltage rail on CS_N solved it for the LiteKIT and on
the boards we have made.
I place a 10K resistor to pull-up and changed CS_N to low at usb
platform init and it worked fine!
Thank you very much!
You're super welcome... glad that time spent wandering in the desert was
able to help someone else in the end :-)
-Andy
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