Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

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SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

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

 (HSMCI_WPMR).

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

(HSMCI_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 HSMCI_WPSR.

The following registers can be protected:

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