Kontron CPCI Backplane - Manual (Page 17)

CPCI Backplane General
ID 24229, Rev. 03 © 2005 Kontron Modular Computers GmbH Page 3
2422
9.03.UG.VC.051007/14565
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P R E L I M I N A R Y
1. Overview
The Kontron Modular Computers' backplane family includes both 3U and 6U form factor back-
planes. 3U form factor backplanes are available with 2, 4, 5, 6, 8, and 11 slots. The 6U form
factor backplanes are available with 4 and 8 slots.
Depending on system requirements, the backplanes can be provided with a wide variety of
power supply connections: bolt type terminal lugs, screw lugs, Faston plug/M4 screw terminals,
ATX power supply connector, DIN type M pluggable power connectors, and Positronic type 47
position pluggable connectors.
In addition, backplanes are available: as 32-bit or 64-bit implementations; with either 33 or 66
MHz PCI clock; with rear IO configurations, telephony configurations; with system manage-
ment bus (IPMB); with support for power supply redundancy and load sharing; and with support
for various monitor and control devices.
1.1 Slot Assignment
A CompactPCI system board (backplane) is composed of up to eight CompactPC slots per
backplane segment with 20.32 mm center-to-center spacing. A CompactPCI backplane seg-
ment consists of one system slot and up to seven peripheral slots.
The functionality of the system master controller in the system slot is to provide bus arbitration,
clock distribution, and reset functions for all boards connected to the bus. In addition, it is re-
sponsible for performing system initialization and configuration.
The location of the system slot is always identified by a triangle below the corresponding P1
connector on the front side of the backplane. Peripheral slots are indicated by a circle.
Physically, the system slot may be located at any position of the backplane. However, for sim-
plicity and system expandability (heat-sink, cooling fan etc.), most Kontron Modular Comput-
ers’ CompactPCI backplanes have their system slots on the right of the bus segment when
viewing the backplane from the front side.
The physical slot numbering of a backplane always begins at the upper left corner of the back-
plane and is always indicated on the board with appropriate markings.
The logical slot numbering which is a function of the IDSEL signal and the associated address
used to select the slot may differ from the physical numbering on the backplanes. When the
system slot is on the left of the backplane segment the logical slot numbering is from left to right
starting with one. When the system slot is on the right of the backplane segment the logical slot
numbering is from right to left beginning with one on the right. The relation between the two
numbering systems are shown in Figure 1. All Kontron Modular Computers' backplanes follow
this scheme.
Warning!
A system master CPU must be inserted into the system slot. The peripheral
slots may contain simple adapters, intelligent slaves, PCI bus masters or
peripheral master CPUs.