A-B 1771-OBDS Limiting output module

A-B 1771-OBDS Limiting output module

Watchdog Timer A watchdog timer function is provided in the VMEchip2 and the MCchip. When the watchdog timer is enabled, it must be reset by software within the programmed time or it times out. The watchdog timer can be programmed to generate a SYSRESET signal, local reset signal, or board fail signal if it times out. Refer to the VMEchip2 and the MCchip in the MVME162 Embedded Controller Programmer’s Reference Guide for detailed programming information. The watchdog timer logic is duplicated in the VMEchip2 and MCchip ASICs. Because the watchdog timer function in the VMEchip2 is a superset of that function in the MCchip (system reset function), the timer in the VMEchip2 is used in all cases except for the version of the MVME162 which does not include the VMEbus interface ("No VMEbus Interface" option).

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