Backend Power Down Sources; Nmi Sources - Intel NetStructure ZT 5515 Product Specification

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5.1.3
5.1.4
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The watchdog timer may be programmed to generate a "CPU Init" if it is not strobed within a given
time-out period. This function is discussed in

Backend Power Down Sources

Board Extraction
When a board is extracted from an enclosure (specifically, when the "board-select" [BD_SEL] pin
is disengaged), the hot swap controller unconditionally removes backend power from the board and
holds the board in reset.
Low Voltage
When any of the 3.3 V, 5 V, or 12 V supply voltages are detected to be below an acceptable
operating limit, the hot swap controller unconditionally removes backend power and holds the
board in reset.
Overcurrent Fault
If a power fault condition (overcurrent) is detected, the hot swap controller removes backend
power and turns the Health LED red. The board is held in reset.

NMI Sources

Watchdog Timer (System Register Address 79h)
The watchdog timer may be programmed to generate a non-maskable interrupt if it is not strobed
within a given time-out period. This function is discussed in
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Intel NetStructure ZT 5515 Compute Processor Board Technical Product Specification
Chapter 8, "Watchdog Timer."
Chapter 8, "Watchdog Timer."