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MFC5272 clock change

Question asked by Louis Sather on Jun 10, 2013
Latest reply on Jun 26, 2013 by TomE

I've have a board that used to run everything off a 48MHz clock. We have a new board revision that attempts to switch this with a 62.5MHz clock (48MHz is still available for USB clock) and we aren't able to program it anymore.

 

I'm attempting to program it using PE Micro's "PROGCFZ Programmer" and a ColdFire BDM connector and we get the error "35 - Not able to access processor. Try a software reset." If we jumper back to the 48MHz clock everything programs fine.

 

The 5272 can run up to 66MHz so I would assume 62.5MHz is a valid operating frequency.

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