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Configuring the VXIpc-870 Watchdog Timer

Hardware: VXI/VME/MXI>>VXI Controllers

Problem:
What is a Watchdog Timer and how do I configure one for my VXIpc-870 controller?

Solution:
The watchdog is an onboard, general-purpose counter/timer. You can it use to monitor running applications and reset the embedded controller or assert a signal if the system locks up. All watchdog timer features are configured in the Hardware Configuration Settings for the VXIpc-870 in T&M Explorer. In the Hardware Configuration, browse to the Watchdog tab and place a check in the "Enable Watchdog Timer" box (see screenshot below).


On a watchdog timeout, the watchdog timer can assert any of the following:
  • Reset
  • VXI trigger line
  • VXI interrupt
The watchdog has a 32 kHz reference clock to clock an 8-bit prescaler that then clocks an 8-bit counter to accommodate timeouts of up to 2 seconds.

Related Links:

Attachments:


vxi870wd.gif

Report Date: 06/29/2006
Last Updated: 07/05/2006
Document ID: 3YSHN4C5

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