Acrosser AR-B9622 - Manual (Page 38)

AR-B9622 User’s Guide
5-4
5.3.2 Watchdog Enabled/Disabled - INDEX 37H
Bit 7 Reserved. Please do not set this bit.
In old version M6117C data sheet, this bit is counter read mode.
Bit 6 0 disable watchdog timer
1 enable watchdog timer
Bit 5-0 Other function.
Please do not modify these bits.
5.3.3 Select Watchdog Report Signal - INDEX 38H
Bit 7-4 watchdog timer time out report signal select
0000 no output signal
0001 IRQ3 selected
0010 IRQ4 selected
0011 IRQ5 selected
0100 IRQ6 selected
0101 IRQ7 selected
0110 IRQ9 selected
0111 IRQ10 selected
1000 IRQ11 selected
1001 IRQ12 selected
1010 IRQ14 selected
1011 IRQ15 selected
1100 NMI selected
1101 system reset selected
1110 no output signal
1111 no output signal
Bit 3-0 Other function.
Please do not modify these bits.
5.3.4 Timeout Status & Reset Watchdog - INDEX 3CH
Bit 7 0 timer timeout not happened
1 timer timeout happened
Read only.
Bit 5 Write this bit “1” to reset timer
The value on this bit has no meaning.
Bit 6
Bit 4-0 Other function.
Please do not modify these bits.
5.3.5 Programming Watchdog - Basic Operation
If we would like to access M6117C configuration register, we need to unlock register at first and lock it after
finishing operation.
(1) Unlock Configuration Register
mov al, 013h
out 22h, al
nop
nop
mov al, 0c5h
out 23h, al
nop
nop