National Instruments 653X Manuale Utente

© National Instruments Corporation

You can use your PXI-653X device as a plug-in device in a standard 
CompactPCI chassis, but you will not be able to access PXI-specific 
functions, such as RTSI bus features detailed in the PXI Specification, 
rev. 1.0.

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. Your PXI-653X device will work in any standard CompactPCI 
chassis adhering to the PICMG CompactPCI 2.0 R2.1 document.

PXI-specific features are implemented on the J2 connector of the 
CompactPCI bus. The following table lists the J2 pins used by your 
PXI-653X device. Your 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 not ever enabled.

Table B-1.  J2 Pins Used by Your PXI-653X Device

PXI-653X 

RTSI Trigger 
(0..6)

PXI Trigger (0..6)

B16, A16, A17, A18, B18, 
C18, E18

Reserved

PXI Star

D17

RTSI Clock

PXI Trigger (7)

E16

Reserved

LBR (7, 8, 10, 11, 12)

A3, C3, E3, A2, B2