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Z51F6412
Product Specification
PS030302-0212
P R E L I M I N A R Y
65
11.3.4 Watch Dog Timer Register description
The Watch dog timer (WDT) Register consists of Watch Dog Timer Register (WDTR), Watch Dog
Timer Counter Register (WDTCR) and Watch Dog Timer Mode Register (WDTMR).
11.3.5 Register description for Watch Dog Timer
WDTR (Watch Dog Timer Register: Write Case) : 8EH
7
6
5
4
3
2
1
0
WDTR7
WDTR6
WDTR5
WDTR4
WDTR3
WDTR2
WDTR1
WDTR0
W
W
W
W
W
W
W
W
Initial value : FFH
WDTR[7:0]
Set a period
WDT Interrupt Interval=(BIT Interrupt Interval) x(WDTR Value+1)
Note) To guarantee proper operation, the data should be greater than 01H.
WDTCR (Watch Dog Timer Counter Register: Read Case) : 8EH
7
6
5
4
3
2
1
0
WDTCR7
WDTCR6
WDTCR5
WDTCR4
WDTCR3
WDTCR2
WDTCR1
WDTCR0
R
R
R
R
R
R
R
R
Initial value : 00H
WDTCR[7:0]
WDT Counter
WDTMR (Watch Dog Timer Mode Register) : 8DH
7
6
5
4
3
2
1
0
WDTEN
WDTRSON
WDTCL
-
-
-
-
WDTIFR
R/W
R/W
R/W
-
-
-
-
R/W
Initial value : 00H
WDTEN
Control WDT operation
0 disable
1 enable
WDTRSON
Control WDT Reset operation
0
Free Running 8-bit timer
1
Watch Dog Timer Reset ON
WDTCL
Clear WDT Counter
0 Free
Run
1
Clear WDT Counter (auto clear after 1 Cycle)
WDTIFR
When WDT Interrupt occurs, this bit becomes ‘1’. For clearing bit, write
‘0’ to this bit or auto clear by INT_ACK signal.
0
WDT Interrupt no generation
1 WDT
Interrupt
generation