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©2004 Inova Computers GmbH Page 3-7Doc. PD00941013.001
ICP-CM
Interfaces
CompactPCI
®
3
3.1 CompactPCI Backplane
The form factor defined for CompactPCI boards is based upon the Eurocard industry standard.
Both 3U (100 mm by 160 mm) and 6U (233 mm by 100 mm) board sizes are defined. A Com-
pactPCI system is composed of up to eight CompactPCI cards. The CompactPCI backplane con-
sists of one System Slot, and up to seven Peripheral Slots.
The System Slot provides arbitration, clock distribution, and reset functions for all boards on the
bus. The System Slot is responsible for performing system initialization by managing each local
board’s IDSEL signal.
Physically, the System Slot may be located at either end of the backplane but Inova have placed
theirs on the right to cater for physical expansion due to heat-sink, hard disk, extended function-
ality etc. The Peripheral Slots may contain simple boards, intelligent slaves, or PCI bus masters.
Note:
Inova’s 3U CompactPCI Celeron M
CPU boards can be used as either
master or slave boards i.e. occupying
either the system slot or the peripheral
slot. The PCI / PCI bridge automati-
cally detects the CPU location within a
system.
Note:
Older backplane revisions (rev. 2.11)
cannot be used with Inova CPUs config-
ured for rear I/O (D). Attempting to do so
will cause the boot sequence to fail.
When installing the CPU in environments
where PXI peripheral boards are being
used, CPU versions without rear I/O must
be used. Otherwise, signal conflict will
occur on the J2 interface.