Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK 数据表
产品代码
AT91SAM9X25-EK
309
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
25.6 Register Write Protection
To prevent any single software error from corrupting MATRIX behavior, certain registers in the address space can be
write-protected by setting the WPEN bit in the
write-protected by setting the WPEN bit in the
(MATRIX_WPMR).
If a write access to a write-protected register is detected, the WPVS flag in the
(MATRIX_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 MATRIX_WPSR.
The following registers can be write-protected: