22.5.1 Watchdog Timer Control Register

The WDT_CR register values must not be modified within three slow clock periods following a restart of the watchdog performed by a write access in WDT_CR. Any modification will cause the watchdog to trigger an end of period earlier than expected.

Name: WDT_CR
Offset: 0x00
Reset: 
Property: Write-only

Bit 3130292827262524 
 KEY[7:0] 
Access WWWWWWWW 
Reset 0000000 
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
          
Access  
Reset  
Bit 76543210 
    LOCKMR   WDRSTT 
Access WW 
Reset  

Bits 31:24 – KEY[7:0] Password

ValueNameDescription
0xA5 PASSWD

Writing any other value in this field aborts the write operation.

Bit 4 – LOCKMR Lock Mode Register Write Access

ValueDescription
0

No effect.

1

Locks WDT_MR if KEY is written to 0xA5. A write access to WDT_MR only restarts the WDT.

Bit 0 – WDRSTT Watchdog Restart

ValueDescription
0

No effect.

1

Restarts the watchdog if KEY is written to 0xA5.