Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet

42023E–SAM–07/2013

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0: PLL is disabled.

1: PLL is enabled.

Note that it is not possible to change any of the PLL configuration bits when the PLL is enabled, Any write to PLLn while the PLL 

is enabled will be discarded.

Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Refer to

 for details.