13.11.11 MATRIX Write Protection Mode Register

Name: MATRIX_WPMR
Offset: 0x01E4
Reset: 0x00000000
Property: Read/Write

Bit 3130292827262524 
 WPKEY[23:16] 
Access WWWWWWWW 
Reset 00000000 
Bit 2322212019181716 
 WPKEY[15:8] 
Access WWWWWWWW 
Reset 00000000 
Bit 15141312111098 
 WPKEY[7:0] 
Access WWWWWWWW 
Reset 00000000 
Bit 76543210 
 CFGFRZ      WPEN 
Access R/WR/W 
Reset 00 

Bits 31:8 – WPKEY[23:0] Write Protection Key

ValueNameDescription
0x4D4154 PASSWD Writing any other value in this field aborts the write operation of the WPEN and CFGFRZ bits.
Always reads as 0.

Bit 7 – CFGFRZ Configuration Freeze

ValueDescription
0 The MATRIX configuration is not frozen.
1 Freezes the MATRIX configuration until hardware reset. The registers that can be protected by the WPEN bit and the Write Protection Mode Register are no longer modifiable.

Bit 0 – WPEN Write Protection Enable

See Register Write Protection for the list of registers that can be write-protected.

ValueDescription
0 Disables the write protection if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
1 Enables the write protection if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).