Kontron MSM-LP Manual User Guide V106 - Manual (Page 29)

MSM-LP / Special Features
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4.4 Digital I/O Ports/Operations
The MSM-LP board has 8 digital inputs/outputs accessible over system port I/O operations.
The base address for I/O operations can be obtained as a WORD value from the PCI config space.
Bus:0, Dev:0x1F, Fun:0, Offset :0x48. Default base address is 0x0480.
4.4.1 I/O Control Access
Access to digital inputs/outputs, i.e. settings of I/O direction and logical level control can be provided over Kontron
embedded API functions.
4.5 Watchdog Function
The MSM-LP provides a watchdog function which resets the system when a specific amount of time has elapsed
without watchdog reset activity. The watchdog is highly configurable and the timeout time can be set between two
seconds and 65,535 seconds. The watchdog output is connected to the system controller.
4.5.1 BIOS Setup
With this setting, the watchdog timer of the MSM-LP can be enabled and the time until a reset is asserted can be
selected. The watchdog timer is part of F81216 chip and can be reset by directly accessing the F81216.
See Section Fehler! Verweisquelle konnte nicht gefunden werden. on how to access the F81216 watchdog.
Set Watchdog timeout:
» Disabled: The watchdog timer is disabled
» 1 / 5 / 15min: The watchdog timer resets the board after this amount of time.
» Default value: Disabled.
Warning: If this setting is enabled without a working watchdog reset in your program, your computer will reset after
the time set in the BIOS setup.
4.5.2 Watchdog Hardware Access
The watchdog registers of the F81216 chip are accessible over I/O mapped registers with indexed access. The
following table shows the addresses used. The F81216 chip has few devices and the watchdog is device number 8.
Address Name Type Description
0x4E IND RW Indexed register access number
0x4F DAT RW Indexed register content