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, except for the Watchdog Test (WDTTEST) register. 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 RW, reset 0x0000.0000
16171819202122232425262728293031
WDTLOCK
RWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWType
0000000000000000Reset
0123456789101112131415
WDTLOCK
RWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWType
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, except for the WDTTEST register. Avoid writes
to the WDTTEST register when the watchdog registers are locked.
A read of this register returns the following values:
DescriptionValue
Locked0x0000.0001
Unlocked0x0000.0000
0x0000.0000RWWDTLOCK31:0
June 18, 20141040
Texas Instruments-Production Data
Watchdog Timers
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