Chapter 1
Getting Started
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National Instruments Corporation
1-5
PXI-1044 Backplane Overview
Interoperability with CompactPCI
The PXI-1044 backplane is interoperable with 5 V and universal
PXI-compatible products and standard CompactPCI products. This is an
important feature, because some PXI systems may require components that
do not implement PXI-specific features. For example, you may want to use
a standard CompactPCI network interface card in a PXI chassis.
The signals on the backplane P1 connectors meet the requirements of the
CompactPCI specification for both peripheral and system modules. Refer
to Appendix B,
, for pinout information.
The PXI-specific signals are on the backplane P2 connectors and are found
only on those signal lines reserved or not used in the CompactPCI 64-bit
specification. Therefore, all modules that meet the requirements of the
CompactPCI 64-bit specification will function in the PXI-1044. Refer to
Appendix B,
, for pinout information.
The PXI-1044 has three PXI bus segments linked through
two 64-bit/33 MHz PXI bridges. The PXI bus segment divisions are
represented on the front of the chassis by vertical lines as shown in
Figure 1-1.
The PXI-1044 backplane has +5 V V(I/O). Refer to the
CompactPCI
Specification PICMG 2.0 R3.0
for details regarding V(I/O).
System Controller Slot
The system controller slot is slot 1 of the chassis as defined by the PXI
Specification. It has three controller expansion slots for system controller
modules that are wider than one slot. As defined in the PXI specification,
these slots allow the controller to expand to the left to prevent the controller
from using peripheral slots.
