Chapter 1
Introduction
©
National Instruments Corporation
1-11
Figure 1-4.
PXI Star Trigger and Local Bus Routing
SCXI Connection
Slot 8 of the PXI backplane has connections for a PXI peripheral module
to control the SCXI subsystem. These connections use the available
local bus right pins (PXI_LBR0:12). The SCXI connection passes
communication, timing, and analog signals between the SCXI backplane
and the PXI module in Slot 8.
Trigger Bus
The eight PXI trigger lines are bused to each slot. You can use the trigger
lines in a variety of ways. For example, you can use triggers to synchronize
the operation of several different PXI peripheral modules. In other
applications, one module can control carefully timed sequences of
operations performed on other modules in the system. Modules can
pass triggers to one another, allowing precisely timed responses to
asynchronous external events the system is monitoring or controlling.
1
Star Triggers
2
PCI Arbitration and Clock Signals
3
System Controller Slot [1]
4
Star Trigger/Peripheral Slot [2]
5
Peripheral Slot [3]
6
Peripheral Slot [4]
7
Peripheral Slot [7]
8
Peripheral Slot [8]
9
Local Bus
10 SCXI Connection
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5
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8
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