Table 73 - Auxiliary I/O, Logical Device 8 [Logical Device Number = 0x08]
NAME
REG INDEX
DEFINITION
STATE
Bit[0] Reserved
Bit[1] Reserved
WDT_TIME_OUT
0xF1
C
Bits[6:2] Reserved, = 00000
Bit[7] WDT Time-out Value Units Select
= 0 Minutes (default)
Default = 0x00
on Vcc POR or
Reset_Drv
= 1 Seconds
WDT_VAL
0xF2
0xF3
Watch-dog Timer Time-out Value
Binary coded, units = minutes (default) or seconds,
selectable via Bit[7] of Reg 0xF1, LD 8.
0x00 Time out disabled
0x01 Time-out = 1 minute (second)
.........
C
C
Default = 0x00
on Vcc POR or
Reset_Drv
0xFF Time-out = 255 minutes (seconds)
WDT_CFG
Watch-dog timer Configuration
Bit[0] Joy-stick Enable
Default = 0x00
=1
WDT is reset upon an I/O read or write of
the Game Port
WDT is not affected by I/O reads or writes
to the Game Port.
on Vcc POR or
Reset_Drv
=0
Bit[1] Keyboard Enable
=1
=0
WDT is reset upon a Keyboard interrupt.
WDT is not affected by Keyboard interrupts.
Bit[2] Mouse Enable
=1
=0
WDT is reset upon a Mouse interrupt.
WDT is not affected by Mouse interrupts.
Bit[3] Reserved
Bits[7:4] WDT Interrupt Mapping
1111 = IRQ15
.........
0011 = IRQ3
0010 = Invalid
0001 = IRQ1
0000 = Disable
158
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