T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 67

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

14.4. Register
WDTPRG (S:A7h)
WatchDog Timer Duration Programming register
Reset Value = XXXX X000b
WDTRST (S:A6h Write only)
WatchDog Timer Enable register
Reset Value = 1111 1111b
NOTE:
The WDRST register is used to reset/enable the WDT by writing 1EH then E1H in sequence.
.
Rev.A - May 17, 2001
Bit Number Bit Mnemonic
Bit Number Bit Mnemonic
7
7
6
5
4
3
2
1
0
7
7
-
-
S2
S1
S0
6
6
-
-
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
WatchDog Timer Duration selection bit 2
WatchDog Timer Duration selection bit 1
WatchDog Timer Duration selection bit 0
Watchdog Control Value
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
The value read from this bit is indeterminate. Do not set this bit.
Work in conjunction with bit 1 and bit 0.
Work in conjunction with bit 2 and bit 0.
Work in conjunction with bit 1 and bit 2.
5
5
-
-
Figure 54. WDTPRG Register
Figure 55. WDTRST Register
Preliminary
4
4
-
-
3
3
-
-
Description
Description
S2
2
2
-
T89C51CC02
S1
1
1
-
S0
0
0
-
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