Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

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SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

To prevent any single software error from corrupting PIO behavior, certain registers in the address space can be
write-protected by setting the WPEN bit in the 

 (PIO_WPMR).

If a write access to a write-protected register is detected, the WPVS flag in the 

 (PIO_WPSR) is set and the field WPVSRC indicates the register in which the write access has been

attempted.

The WPVS bit is automatically cleared after reading the PIO_WPSR.

The following registers can be write-protected:

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