Chapter 1
Introduction
1-2
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between the PCI/PXI-1422 and up to four National Instruments DAQ
or IMAQ devices in your computer. The RTSI bus can even synchronize
multiple IMAQ hardware captures.
For more detailed specifications on the PCI/PXI-1422, see Appendix A,
Using PXI with CompactPCI
Using PXI-compatible products with standard CompactPCI products is an
important feature provided by the
PXI Specification
, Revision 1.0. If you
use a PXI-compatible plug-in device in a standard CompactPCI chassis,
you will be unable to use PXI-specific functions, but you can still use the
basic plug-in device functions. For example, the RTSI bus on your
PXI-1422 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 or between CompactPCI devices with sub-buses and PXI. The
standard implementation for CompactPCI does not include these
sub-buses. The PXI-1422 device works in any standard CompactPCI
chassis adhering to the
PICMG 2.0 R2.1 CompactPCI
core specification
using the 64-bit definition for J2.
PXI-specific features are implemented on the J2 connector of the
CompactPCI bus. Table 1-1 lists the J2 pins the PXI-1422 device uses.
The PXI device is compatible with any CompactPCI chassis with a sub-bus
that does not drive these lines. Even if the sub-bus is capable of driving
these lines, the PXI device is still compatible as long as those pins on the
sub-bus are disabled by default and are never enabled. Damage may result
if these lines are driven by the sub-bus.
Table 1-1.
Pins Used by the PXI-1422 Device
PXI-1422 Signal
PXI Pin Name
PXI J2 Pin Number
RTSI Trigger (0..6)
PXI Trigger (0..6)
B16, A16, A17, A18,
B18, C18, E18
