Acrosser Technology AR-B1479 - Watchdog Timer

AR-B1479 User’s Guide
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3.2.20 ATX POWER External Bottom Connector (J2)
OFF
Factory Preset
2
1
2
1
ON
Figure 0-10 J2: External Bottom Connector for ATX power
3.2.21 Ethernet Setup (JP2)
In here not install is called Enable. If it enable, it can pass through Ethernet. And when it disable, it can’t pass
through Ethernet.
Factory Preset
3.2.22 IRQ12 FOR EXPANSION CARDS (J12)
1 FOR SUPER IO
2 EXP
3.3 WATCHDOG TIMER
This section describes the use of Watchdog Timer, including disable, enable, and trigger. AR-B1479 is equipped
with a programmable time-out period watchdog timer that occupies I/O port 214H. Users can use simple program
to enable the watchdog timer. Once you enable the watchdog timer, the program should trigger it every time before
it times out. Watchdog Timer will generate a response (system or IRQ) due to system fails to trigger or disable
watchdog timer before preset timer, times out.
Watchdog
Register
Time Base
Counter and
Compartor
RESET
Enable(D7)
Time Factor
(D0-D5)
Write and
Trigger
Watchdog Block Diagram