AR-B1893 User’s Guide
AR-B11893 Pentium M inside (With VGA)
with On Board DDR, 4 Port built in LAN, 1 Mini PCI, 1 CF
34
5
Watchdog Timer
The Watchdog Timer is provided to ensure that standalone systems can
always recover from catastrophic conditions that cause the CPU to crash.
This condition may have occurred by external EMI or a software bug.
When the CPU stops working correctly, hardware on the board will either
perform a hardware reset (cold boot) or a Non-Maskable Interrupt (NMI)
to bring the system back to a known state.
1. Watch Dog Timer is controlled by CRF5, CRF6, CRF7 of Logical
Device 8 of Super I/O (W83627HF)
2. Timer range 1-255 second / minute
3. To test the Watch Dog function, we have developed a program
(“
9936_WDOG
”) and it run under DOS OS.
Watch Dog Test : Example WatchDog 25 second
