National Instruments PCI-6023E - Manual (Page 27)

Chapter 3 Hardware Overview
© National Instruments Corporation 3-7 PCI-6023E/6024E/6025E User Manual
Figure 3-3. CONVERT* Signal Routing
This figure shows that CONVERT* can be generated from a number of
sources, including the external signals RTSI<0..6> and PFI<0..9> and the
internal signals Sample Interval Counter TC and GPCTR0_OUT.
Many of these timing signals are also available as outputs on the RTSI pins,
as indicated in the
RTSI Triggers section in this chapter, and on the PFI
pins, as indicated in Chapter 4, Signal Connections .
Programmable Function Inputs
Ten PFI pins are available on the board connector as PFI<0..9> and are
connected to the board’s internal signal routing multiplexer for each timing
signal. Software can select any one of the PFI pins as the external source
for a given timing signal. It is important to note that any of the PFI pins can
be used as an input by any of the timing signals and that multiple timing
signals can use the same PFI simultaneously. This flexible routing scheme
reduces the need to change physical connections to the I/O connector for
different applications. You can also individually enable each of the PFI
pins to output a specific internal timing signal. For example, if you need the
RTSI Trigger <0..6>
PFI<0..9>
CONVERT*
Sample Interval Counter TC
GPCTR0_OUT
PCI.book Page 7 Wednesday, September 16, 1998 9:09 AM