CP390
Hotswap
ID 19976, Rev. 0200
Page 4 - 3
®
PEP Modular Computers GmbH
4.1.1.1 The Hotswap Backplane
The hotswap backplane has staggered pins to ensure defined power sequencing.
Figure 4-1: Illustration of Staggered Pinning on the Hotswap Backplane
4.1.1.2 The System Host (System Controller)
The System Controller must have the possibility to utilize the special signals defined by
the CompactPCI hotswap specification. If a high availability system is used it must addi-
tionally be able to control the hardware connection with the peripheral boards (Hardware
Connection Control).
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Note:
Some special signals (e.g. ENUM, HEALTHY, BDSEL...) have par-
ticular routing requirements.
EXPLANATORY KEY
*EARLY POW ER: a part of VCC, 3.3V, V(I/O) and GND
*BACK END PO W ER: the m ain part of VCC,
+3.3V, V(I/O ), +/-12V and GND
*HEALTHY: only for high availability
Step 3
Step 1
Step 2
EAR LY POW ER *
B AC K EN D POW ER *
PC I SIGN ALS
EN UM #
H EA LTHY# *
BD _SEL#
BACKPLANE
BO ARD
