User manual

Chapter 6 Programmable Function Interfaces (PFI)
E Series User Manual 6-2 ni.com
Not all timing signals can be output. PFI pins are labeled with the timing
signal that can be output on it. For example, PFI 8 is labeled PFI 8/CTR 0
Source. The following timing signals can be output on PFI pins:
• AI Start Trigger Signal
• AI Reference Trigger Signal
• AI Sample Clock Signal
• AI Convert Clock Signal
• AO Start Trigger Signal
• AO Sample Clock Signal
• Counter 0 Source Signal
• Counter 0 Gate Signal
• Counter 1 Source Signal
• Counter 1 Gate Signal
Caution Do not drive a PFI signal externally when it is configured as an output.
Refer to the Power-On States of the PFI and DIO Lines section of
Chapter 4, Digital I/O, for more information about PFI lines.