User's Manual

Chapter 10 PFI

Most functions allow you to configure the polarity of PFI inputs and

whether the input is edge or level sensitive.

Exporting Timing Output Signals Using PFI Terminals

You can route any of the following timing signals to any PFI output

terminal.

• AI Convert Clock*

• AI Hold Complete Event

• AI Reference Trigger

• AI Sample Clock

• AI Start Trigger

• AO Sample Clock*

•AO Start Trigger

• Counter n Source

• Counter n Gate

• Counter n Internal Output

•Frequency Output

Note Signals with a * are inverted before being driven to a terminal; that is, these signals

are active low.

Using PFI Terminals as Static Digital I/Os

Each input PFI line can be individually configured as a static digital input,

called P0.x. Each output PFI line can be individually configured as a static

digital output, called P1.x.

Connecting PFI Input Signals

All PFI input connections are referenced to D GND. Figure 10-3 shows this

reference, and how to connect an external PFI 0 source and an external

PFI 2 source to two PFI terminals.