Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
464
25.12.7 Write Protect Mode Register
Name: MATRIX_WPMR
Address: 0x400E03E4
Access: Read-write
For more details on MATRIX_WPMR, please refer to Section 25.11 “Write Protect Registers”.
The protected registers are:
“Bus Matrix Master Configuration Registers”
“Bus Matrix Slave Configuration Registers”
“Bus Matrix Priority Registers A For Slaves”
“Bus Matrix Master Remap Control Register”
“Write Protect Mode Register”
 WPEN: Write Protect Enable
0: Disables the Write Protect if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
1: Enables the Write Protect if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
Protects the entire Bus Matrix address space from address offset 0x000 to 0x1FC.
 WPKEY: Write Protect KEY (Write-only)
31 30 29 28 27 26 25 24
WPKEY
23 22 21 20 19 18 17 16
WPKEY
15 14 13 12 11 10 9 8
WPKEY
76543210
–––––––WPEN
Value Name Description
0x4D4154 PASSWD
Writing any other value in this field aborts the write operation
of the WPEN bit.
Always reads as 0.