SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 950

• Manufacturer Part Number: SAM3A4C
• Manufacturer: Atmel Corporation

37.13 Write Protection Registers
950
950
SAM3X/A
SAM3X/A
To prevent any single software error that may corrupt HSMCI behavior, the entire HSMCI
address space from address offset 0x000 to 0x00FC can be write-protected by setting the
WPEN bit in the
If a write access to anywhere in the HSMCI address space from address offset 0x000 to 0x00FC
is detected, then the WPVS flag in the HSMCI Write Protect Status Register (HSMCI_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 HSMCI Write Protect Mode Register (HSMCI_WPMR)
with the appropriate access key, WPKEY.
The protected registers are:
•
•
•
•
•
•
“HSMCI Mode Register” on page 953
“HSMCI Data Timeout Register” on page 955
“HSMCI SDCard/SDIO Register” on page 956
“HSMCI Completion Signal Timeout Register” on page 962
“HSMCI DMA Configuration Register” on page 976
“HSMCI Configuration Register” on page 977
“HSMCI Write Protect Mode Register”
(HSMCI_WPMR).
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12