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T89C51AC2-RLSI-M Datasheet(PDF) 73 Page - ATMEL Corporation

Part # T89C51AC2-RLSI-M
Description  8-bit MCU with 32K bytes Flash, 10 bits A/D and EEPROM
PDF  117 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C51AC2-RLSI-M Datasheet(HTML) 73 Page - ATMEL Corporation

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Draft.A - March 30, 2001
73
Preview - Confidential
T89C51AC2
14.4. Register
WDTPRG (S:A7h)
WatchDog Timer Duration Programming register
Reset Value = XXXX X000b
Figure 62. WDTPRG Register
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.
.
Figure 63. WDTRST Register
7
6
5
4
3
2
1
0
-
-
-
-
-
S2
S1
S0
Bit Number Bit Mnemonic
Description
7-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
2S2
WatchDog Timer Duration selection bit 2
Work in conjunction with bit 1 and bit 0.
1S1
WatchDog Timer Duration selection bit 1
Work in conjunction with bit 2 and bit 0.
0S0
WatchDog Timer Duration selection bit 0
Work in conjunction with bit 1 and bit 2.
7
6
5
4
3
2
1
0
--------
Bit Number Bit Mnemonic
Description
7-
Watchdog Control Value



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