Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
454
25.11 Write Protect Registers
To prevent any single software error that may corrupt the Bus Matrix behavior, the entire Bus Matrix address
space can be write-protected by setting the WPEN bit in the Bus Matrix Write Protect Mode Register
(MATRIX_WPMR).
space can be write-protected by setting the WPEN bit in the Bus Matrix Write Protect Mode Register
(MATRIX_WPMR).
If WPEN is at one and a write access in the Bus Matrix address space is detected, then the WPVS flag in the Bus
Matrix Write Protect Status Register (MATRIX_WPSR) is set and the field WPVSRC indicates in which register the
write access has been attempted.
Matrix Write Protect Status Register (MATRIX_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 Bus Matrix Write Protect Mode Register (MATRIX_WPMR) with the
appropriate access key WPKEY.
appropriate access key WPKEY.
The protected registers are: