LM3S308 Luminary Micro, Inc, LM3S308 Datasheet - Page 210

• Manufacturer Part Number: LM3S308
• Description: Lm3s308 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
Watchdog Timer
Watchdog Lock (WDTLOCK)
Base 0x4000.0000
Offset 0xC00
Type R/W, reset 0x0000.0000
210
Bit/Field
31:0
R/W
R/W
31
15
0
0
R/W
R/W
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)).
30
14
0
0
R/W
R/W
WDTLock
29
13
0
0
Name
R/W
R/W
28
12
0
0
R/W
R/W
27
11
0
0
Type
R/W
R/W
R/W
26
10
0
0
0x0000
R/W
R/W
Reset
25
0
9
0
Preliminary
R/W
R/W
24
0
8
0
WDTLock
WDTLock
Description
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:
0x0000.0001
0x0000.0000
Value
R/W
R/W
23
0
7
0
R/W
R/W
22
0
6
0
Description
Locked
Unlocked
R/W
R/W
21
0
5
0
R/W
R/W
20
0
4
0
R/W
R/W
19
0
3
0
R/W
R/W
18
0
2
0
R/W
R/W
17
0
1
0
June 04, 2008
R/W
R/W
16
0
0
0