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HighWire HW400c/2 User Reference Guide Rev 1.0
3.7.5 Hot Swap Sequence
sequence is a coordination between the operator, the hardware on the
W400c/2 board, and the host system board that is capable of basic, full, or high-
availability hot swap. Table 27 outlays the Hot Swap insertion and extraction
Hot Swap Insertion/Extraction Sequences
Type Sequence Process
The hot swap
H
sequences.
Table 27. Overview of
Sequence
INSERTION he board is the e
tu e LE
AT ed to a high state that
by th
I brid host via the ENUM#
ind at a boa rted.
t sy ard initia 0c/2
d instruct I bridge blue L
e off state blue LED assur s the operato
nal.
When t inserted into enclosure, th following
occurs:
1. Hardware
T
rns on the blu D.
2. The L_S signal is forc is
sensed
3. The PC
e PCI bridge.
s thege inform system
signal to
The hos
icate th rd has been inse
li 04. stem bo zes the HW4
to turn ff the
board
Ean
5. Th
s the PC
of the
o
e
D.
r that
the board is functio
EXTRACTION is extracted from the en sure, the fo
ompactPCI ejector is d down to start
the extraction sequence. The ejec tch forces the
AT sig high state.
CI brid the cha STAT an
causes ENUM# to toggle, informing the host system
board that the HW400c/2 board is about to be extracted.
3. The operator then waits for the blue LED to turn on
before attempting to fully eject the HW400c/2 board.
4. The host system halts all applications associated with the
HW400c/2 board that is about to be extracted.
5. The host system then instructs the PCI bridge to turn on
the blue LED.
6. After the blue LED turns on, the operator can continue
with the extraction of the board.
When the board
occurs:
clo llowing
1. The bottom C flippe
tor swi
L_ST nal to a
2. The P ge senses nge in L_ d
For a complete description of all hot swap functions, see the PICMG 2.1 R2.0 specification.
October 10, 2006 Copyright 2006, SBE, Inc. Page 45