User manual

13 Chapter 1

1.8.3 Watchdog timer output (JWDT1)

The AIMB-556 contains a watchdog timer that will reset the CPU or send

a signal to IRQ11 in the event the CPU stops processing. This feature

means the AIMB-764 will recover from a software failure or an EMI

problem. The J2 jumper settings control the outcome of what the com-

puter will do in the event the watchdog timer is tripped.

Table 1.4: Watchdog timer output (JWDT1)

Function Jumper Setting

IRQ11

* Reset

*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.

Table 1.5: ATX/AT Mode selector (PSON1)

Function Jumper Setting

AT Mode

ATX Mode

1-2 closed

2-3 closed

1-2 closed

2-3 closed