Chapter4 SignalConnections
©NationalInstruments Corporation 4-31 6023E/6024E/6025EUser Manual
Figure4-16. TimingI/O Connections
Programmable Function Input Connections
There are a total of 13 internal timing signals that you can externally
controlf rom thePFI p ins.The source foreach of these signals is
software-selectablefrom any of the PFIs when you want external control.
This flexiblerouting s chemereduces theneed to change the physical
wiringto thedevice I/O connector for different applications requiring
alternative wiring.
Youcan individually enable each of the PFI pins to output a specific
internalti ming signal. For example,if youneed the CONVERT*signal as
an output on the I/O connector,software can turn on the output driver for
the PFI2/CONVERT*pin. Be careful not to drive a PFI signal externally
when itis configured as an output.
As aninput, you can individually configure each PFI pin for edge or level
detection and for polarity selection, as well. Youcan use the polarity
selection for anyof the 13 tim ing signals, butthe e dge or leveldetection
TRIG1
Source
DGND
PFI0/TRIG1
PFI2/CONVERT*
CONVERT*
Source
I/OConnector