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MCF52235EVB EPHY and FlexCAN

Question asked by zhao chunbo on Jun 10, 2013

Hi everyone,

 

Nowadays I use the MCF52235EVB to test my project what needs the EPHY work meanwhile I nead to set the FlexCAN to 16tq baudtate at 500k.

But there is a problem, the The EPHY requires a 25-MHz crystal for its basic operation as it said in the MCF52235RM.

As a result when I use a 25-MHz crystal the EPHY can work,but the FlexCAN can not set to 16tq baudtate at 500k.

So what can I do if I want to set the FlexCAN  to 16tq baudtate at 500k at the same time make sure the EPHY work?

 

Could I change the crystal to 8-MHz for the EPHY?

Is there a method that can make the MCF52235EVB to supply module clock separately to the EPHY and FlexCAN?

 

By the way why the EPHY requires a 25-MHz crystal for its basic operation?  And why the clock is odd?

 

 

I think it is very hard to use for this.

 

 


Best Regards

ZHAO

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