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1.8.3 Watchdog timer output (J4)
The
DVMB-554E
contains a
watchdog
timer that will reset the CPU or
send a signal to PIRQE in the
event the
CPU stops processing. This
feature means the DVMB-554E will recover from
a software failure
or an
EMI problem. The J4
jumper settings control the outcome
of what
the
computer will do in
the
event the
watchdog
timer is
tripped.
Table 1.4:
Watchdog timer output (J4)
Function Jumper Setting
IRQ11
1
1-2 closed
* Reset
1
2-3 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.
Tabl e
1.5: ATX/AT
Mode selector (J5)
Function Jumper Setting
AT Mode
1
1-2 closed
ATX Mode
1
2-3 closed