AAEON EMB-QM87A - Manual (Page 88)

M i n i - I T X E M B - Q M 8 7 A
Appendix A Programming the Watchdog Timer A-6
A.1 Watchdog Timer Initial Program
Table 1 : SuperIO relative register table
Default Value Note
Index 0x2E
(Note1)
SIO MB PnP Mode Index Register
0x2E or 0x4E
Data 0x2F
(Note2)
SIO MB PnP Mode Data Register
0x2F or 0x4F
Table 2 : Watchdog relative register table
LDN Register BitNum Value Note
Timer Counter 0x07
(Note3)
0xF6
(Note4) (Note24)
Time of watchdog timer
(0~255)
This register is byte access
Counting Unit 0x07
(Note5)
0xF5
(Note6)
3
(Note7)
0
(Note8)
Select time unit.
0: second
1: minute
Watchdog Enable 0x07 (Note9) 0xF5 (Note10) 5 (Note11) 1 (Note12)
0: Disable
1: Enable
Timeout Status 0x07
(Note13)
0xF5
(Note14)
6
(Note15)
1 1: Clear timeout status
Output Mode 0x07
(Note16)
0xF5
(Note17)
4
(Note18)
1
(Note19)
Select WDTRST# output mode
0: level
1: pulse
WDTRST output 0x07 (Note20) 0xFA (Note21) 0 (Note22) 1 (Note23)
Enable/Disable
time out output via WDTRST#
0: Disable
1: Enable