Figure 4-8. timing i/o connections, Programmable function input connections, Programmable function input connections -17 – National Instruments NI PCI-6110 User Manual
Page 47
Chapter 4
Connecting Signals
© National Instruments Corporation
4-17
All digital timing connections are referenced to DGND. Figure 4-8
illustrates how to connect an external TRIG1 source and an external
CONVERT* source to two NI PCI-6110/6111 PFI pins.
Figure 4-8. Timing I/O Connections
Programmable Function Input Connections
There are a total of 13 internal timing signals that you can externally
control from the PFI pins. The source for each signal is software-selectable
from any PFI when you want external control. This flexible routing scheme
reduces the need to change the physical wiring to the device I/O connector
for applications requiring alternative wiring.
You can individually enable each PFI pin to output a specific internal
timing signal. For example, if you need the STARTSCAN* signal as an
output on the I/O connector, software can turn on the output driver for the
PFI2/STARTSCAN* pin.
Caution
Be careful not to externally drive a PFI signal when it is configured as an output.
DGND
PFI0/TRIG1
PFI7/STARTSCAN
STARTSCAN
Source
I/O Connector
NI PCI-6110/6111
TRIG1
Source