Kontron CPCI Generic backplane - Manual (Page 17)

CPCI Backplane General
ID 24229, Rev. 01 © 2002 PEP Modular Computers GmbH Page 3
1. Overview
The PEP Modular Computers' backplane family includes 4, 6 and 8-slot boards both in 3U and
6U format. They can be provided with either a standard DIN M-series, a Faston plug/M4 screw
or an ATX power supply connector. Backplanes are available as 32-bit or 64-bit implementa-
tions.
1.1 Slot Assignment
A CompactPCI system board (backplane) is composed of up to eight CompactPCI board loca-
tions (slots) with 20.32 mm center-to-center spacing. A CompactPCI backplane consists of
one system slot and up to seven peripheral slots. The system slot provides arbitration, clock
distribution and reset functions for all boards connected to the bus. The system slot is respon-
sible for performing system initialization by managing each local board's IDSEL signal.
The system slot is always marked by a triangle on the front side of the board containing the
physical slot number. The following symbols provide visual indication of backplane connector
and adapter board capability:
System slot — slot 1; Peripheral slot — slots 2 ... n.
Physically, the system slot may be located at the left or right end of the backplane. For simplic-
ity and system expandability (heat-sink, cooling fan etc.), all
PEP Modular Computers Com-
pactPCI backplanes have their system slots at the right end when viewing the backplane from
the front side.
The logical slot numbering may differ from the physical numbering on the backplanes. The
relation between the two numbering systems are shown in the figure below.
Figure 1: PEP Modular Computers Slot Numbering (both 3U and 6U boards)
Warning!
A system master CPU should be inserted into the system slot only. The
peripheral slots may contain simple adapters, intelligent slaves, PCI
bus masters or peripheral master CPU's.
Physical slot numbering:
7 8 6 5 4 3 2 1
Logical slot numbering:
2 1 3 4 5 6 7 8