30 SBC-410 User's Manual
1. Write to I/O port 443 (Hex) and designate a time-out interval.
This will enable the watchdog and set up its time-out interval.
2. Write to I/O port 080 (Hex) and any random value. This will in
turn disable the watchdog timer.
The watchdog timer-out interval can be set at 15 levels between 2
and 32 seconds. The following table shows the Hex values for the
appropriate time-out intervals:
Watchdog timer delay values
Delay time
Value (Hex)
Delay time
Value (Hex)
0~2
F
16~18
7
2~4
E
18~20
6
4~6
D
20~22
5
6~8
C
22~24
4
8~10
B
24~26
3
10~12
A
26~28
2
12~14
9
28~30
1
SMI (System Management interrupt) switch (CN11)
You can connect an extrnal switch to allow your computer to
enter suspend mode.
SMI switch (CN11)
Pin
Function
Suspend mode Normal mode*
1
SMI
2
Ground
*default
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