Chapter 1
Getting Started
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National Instruments Corporation
1-5
PXI-1056 Backplane Overview
Interoperability with CompactPCI
The PXI-1056 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-1056.
Refer to Appendix B,
, for pinout information.
Note
The PXI-1056 backplane is 32-bit PCI. 64-bit CompactPCI cards will operate in
32-bit mode in this chassis.
The PXI-1056 backplane has +5 V V(I/O). Refer to the
CompactPCI
Specification PICMG 2.0 R 3.0
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 one controller expansion slot 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.
Star Trigger Slot
The star trigger (ST) slot is slot 2. This slot has dedicated equal-length
trigger lines between slot 2 and peripheral slots 3 through 15 (refer to
Figure 1-3). The PXI Specification defines only 13 star trigger lines;
therefore, the last three slots do not receive a star trigger. Slot 2 is intended
for modules with ST functionality that can provide individual triggers to all
other peripheral modules. However, if you do not require advanced trigger
functionality, you can install any standard peripheral module in this slot.
