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MC81F4204B Datasheet(PDF) 91 Page - Finechips

Part No. MC81F4204B
Description  ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
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Manufacturer  FINECHIPS [Finechips]
Direct Link  http://www.finechips.com
Logo FINECHIPS - Finechips

MC81F4204B Datasheet(HTML) 91 Page - Finechips

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MC81F4204
October 19, 2009 Ver.1.35
91
15.1 Registers
WDTR
WATCHDOG TIMER REGISTER
00F4H
7
6
5
4
3
2
1
0
WDTR
WDTCL
WDTCMP
Reset value: 7FH
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
WDTCL
Watchdog Timer Clear Bit
0: Free-run count
1: When the WDTCL is set to
“1”, binary
counter is cleared to
“0”. And the WDTCL
becomes
“0” automatically after one
machine cycle. Counter count up again.
WDTCMP
bit6
– bit0
7-bit compare data
WDTSR
WATCHDOG TIMER STATUS REGISTER
00F6H
7
6
5
4
3
2
1
0
WDTSR
One byte register
Reset value: 00H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Watchdog Timer Function Disable Code
(for System Reset)
10100101: Disable watchdog timer function
Others: Enable watchdog timer function
Figure 15-2 Watchdog Timer Timing


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