Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK 数据表
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产品代码
AT91SAM9X25-EK
1001
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
44.8.1 Write Protection Registers
To prevent any single software error that may corrupt SSC behavior, certain address spaces can be write-protected by
setting the WPEN bit in the
setting the WPEN bit in the
(SSC_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the SSC Write Protect Status Register
(US_WPSR) is set and the field WPVSRC indicates in which register the write access has been attempted.
(US_WPSR) is set and the field WPVSRC indicates in which register the write access has been attempted.
The WPVS flag is reset by writing the SSC Write Protect Mode Register (SSC_WPMR) with the appropriate access key,
WPKEY.
WPKEY.
The protected registers are: