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Installing the Board
3-31
3.5.1.7.
Hot Swap HA (High Availability) Signals
Signal
Pin Assignation
Description
BDSEL S2-S5
A15, B15, E15, D19
Board Select, one of the shortest pins (the last to
mate and the first to break contact).
HEALTHY S2-S4
A16, B16, D17
Used to acknowledge the health of the board
PCIRST S2-S4
A17, C15, E17
Used to indicate the CompactPCI Bus reset signal
3.5.1.8. Miscellaneous
Signals
Signal
Pin Assignation
Description
PWRBT# A19
ACPI
Reserved
EXT-SMI
B19
System Management Interrupt Input
PX4-NMI
C19
Non Maskable Interrupt Input
PWROK-33
E19
High when 3.3V supply is valid on the board
3.5.2 J4 Signal Specification
3.5.2.1. Power
Management
Signal
Pin Assignation
Description
I2C:CLK A1
I2C
clock
signal
I2C:DATA B1
I2C
data
signal
LID C1
Reserved
EXTFANFAIL0#
D1
Enclosure fan 0 fail
EXTFAN1FAIL1#
E1
Enclosure fan 1 fail
SM-BYPASS# A2
Reserved
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