Chapter 3
Hardware Overview
©
National Instruments Corporation
3-11
Figure 3-9.
CONVERT* Signal Routing
Figure 3-9 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 (SI2) counter TC and GPCTR0_OUT.
Many of these timing signals are also available as outputs on the RTSI pins,
as indicated in the
section, and on the PFI pins, as explained
in Chapter 4,
Programmable Function Inputs
Ten PFI signals connect to the signal routing multiplexer for each timing
signal, and software can select any PFI pin as the external source for a given
timing signal. Any timing signal can use any PFI pin as an input, and
multiple timing signals can simultaneously use the same PFI. This flexible
routing scheme reduces the need to change physical connections to the I/O
connector for different applications. You can individually enable each PFI
pin 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