Register 8: Watchdog Lock (WDTLOCK), offset 0xC00
Writing 0x1ACC.E551 to the WDTLOCK register enables write access to all other registers. Writing
any other value to the WDTLOCK register re-enables the locked state for register writes to all the
other registers. Reading the WDTLOCK register returns the lock status rather than the 32-bit value
written. Therefore, when write accesses are disabled, reading the WDTLOCK register returns
0x0000.0001 (when locked; otherwise, the returned value is 0x0000.0000 (unlocked)).
Watchdog Lock (WDTLOCK)
WDT0 base: 0x4000.0000
WDT1 base: 0x4000.1000
Offset 0xC00
Type R/W, reset 0x0000.0000
16171819202122232425262728293031
WDTLOCK
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
0000000000000000Reset
0123456789101112131415
WDTLOCK
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Watchdog Lock
A write of the value 0x1ACC.E551 unlocks the watchdog registers for
write access. A write of any other value reapplies the lock, preventing
any register updates.
A read of this register returns the following values:
DescriptionValue
Locked0x0000.0001
Unlocked0x0000.0000
0x0000.0000R/WWDTLOCK31:0
July 24, 2012520
Texas Instruments-Production Data
Watchdog Timers
OBSOLETE: TI has discontinued production of this device.