Using Pxi With Compactpci - National Instruments NI 6221 User Manual

Using PXI with CompactPCI

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For some PXI M Series devices, there are two variants—one that will work in PXI hybrid slots and one that supports local bus
for SCXI control when the device is in the right-most slot. Refer to the device specifications for more information.
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Hybrid slot-compatible defines where the device can be installed. PXI
M Series devices can be installed in the following chassis and slots:
• PXI chassis—PXI M Series devices can be installed in any peripheral
slot of a PXI chassis.
• PXI Express chassis
following PXI Express chassis slots:
– PXI-1 slots—Accepts all PXI modules
– PXI hybrid slots—Accepts PXI modules that are hybrid
slot-compatible or PXI Express modules
– PXI Express slots—Accepts PXI Express modules
PXI-1 devices use PCI signaling to communicate to the host controller
(as opposed to PCI Express signaling).
Peripheral devices are installed in peripheral slots and are not system
controllers.
Using PXI-compatible products with standard CompactPCI products is an
important feature provided by the PXI Hardware Specification
Revision 2.1. If you use a PXI-compatible plug-in module in a standard
CompactPCI chassis, you cannot use PXI-specific functions, but you can
still use the basic plug-in device functions. For example, the RTSI bus on a
PXI M Series device is available in a PXI chassis, but not in a CompactPCI
chassis.
The CompactPCI specification permits vendors to develop sub-buses that
coexist with the basic PCI interface on the CompactPCI bus. Compatible
operation is not guaranteed between CompactPCI devices with different
sub-buses nor between CompactPCI devices with sub-buses and PXI.
The standard implementation for CompactPCI does not include these
sub-buses. The PXI M Series device works in any standard CompactPCI
chassis adhering to the PICMG CompactPCI 2.0 R3.0 core specification.
PXI-specific features are implemented on the J2 connector of the
CompactPCI bus. The PXI device is compatible with any CompactPCI
chassis with a sub-bus that does not drive the lines used by that device. Even
if the sub-bus is capable of driving these lines, the PXI device is still
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—PXI M Series devices can be installed in the
10-3
Chapter 10 Bus Interface
M Series User Manual