GOT321W-502-PCT/FR
User’s Manual
Watchdog Timer
35
ITE 8620 Datasheet about Watch Dog register description
1. Watch Dog Timer Control Register (Index=71h,Default=00h)
Bit
Description
7
WDT is reset upon a CIR interrupt
6
WDT is reset upon a KBC(Mouse) interrupt
5
WDT is reset upon a KBC(Keyboard) interrupt
4
Reserved
3-2 Reserved
1
Force Time-out
This bit is self-cleared.
0
WDT Status
1:WDT value is equal to 0.
0:WDT value is not equal to 0.
2. Watch Dog Timer Control Register (Index=72h,Default=001s0000b)
Bit
Description
7
WDT Time-out Value Select 1
1:Second
0:Minute
6
WDT Output through KRST (pulse) Enable
1:Enable
0:Disable
5
WDT Time-out Value Extra Select
1: 62.5ms x WDT Timer-out value (default = 3.5s)
0:Determined by WDT Timer-out value select 1 (bit 7 of this register)
4
WDT Output through PWRGD Enable
1:Enable
0:Disable
3-0 Interrupt Level Select for WDT
3. Watch Dog Timer Time-out Value (LSB) Register (Index=73h,Default=38h)
Bit
Description
7-0 WDT Time-out Value 7-0
4. Watch Dog Timer Time-out Value (MSB) Register (Index=74h,Default=00h)
Bit
Description
7-0 WDT Time-out Value 15-8
