FMPLLMPC5554 CW2.7

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FMPLLMPC5554 CW2.7

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khurram712
Contributor I

MPC5554 cook book includes a project that uses FMPLL.In the initialization source code,there is a loop in which there is  check for "LOCK" bit of "FMPLL.SYNSR" register as the main condition.The bit never sets to 1 and so the loop never ends.

Do i need to make some change in source code in order for PLL to occur or do i need to do something else in order to execute it properly.

 

Regards

 

Khurram Hameed

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khurram712
Contributor I

can some one please answer this query...it straight out of the book code..still it is not working...any suggestion or solution...

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stanish
NXP Employee
NXP Employee

Hi khurram712,

 

I've just tested FMPLL example and seems to work correctly with EVB MPC5554DEMO.

Do you use a custom board or Freescale EVB?

The example expects 8Mhz external crystal. What crystal do you have?

 

Stanish

 

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