Advantech AIMB-786, User Manual

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9 AIMB-786 User Manual
Chapter 1
H
ardware
C
onfiguration
1.8.3 Watchdog timer output and OBS alarm (JWDT1+JOBS1)
The AIMB-786 contains a watchdog timer that will reset the CPU. This feature means
the AIMB-786 will recover from a software failure or an EMI problem. The JWDT1
jumper settings control the outcome of what the computer will do in the event the
watchdog timer is tripped.
The 2-pin OBS alarm header (JOBS1) is to enable/disable hardware monitor alarm
function.
1.8.4 ATX/AT mode selection (PSON1)
Table 1.4: Watchdog timer output and OBS alarm (JWDT1+JOBS1)
Function Jumper Setting
Watchdog timer disable (2-4)
OBS beep (8-10)
2-4, 8-10 closed
*Watchdog timer reset (4-6)
OBS beep (8-10)
4-6, 8-10 closed
* default setting
Note! The interrupt output of the watchdog timer is a low level signal. It will be
held low until the watchdog timer is reset.
1
2 4 6 8 10
1
2 4 6 8 10
Table 1.5: ATX/AT mode selection (PSON1)
Function Jumper Setting
AT mode
* ATX mode
* default setting
1-2 closed
1 2 3
2-3 closed
1 2 3