Gpctr1_gate signal, Figure 4-31. gpctr1_gate signal timing, Gpctr1_gate signal -34 – National Instruments NI PCI-6110 User Manual
Page 64
Chapter 4
Connecting Signals
4-34
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GPCTR1_GATE Signal
Any PFI pin can externally input the GPCTR1_GATE signal, which is
available as an output on the PFI4/GPCTR1_GATE pin.
As an input, GPCTR1_GATE is configured in edge-detection mode. You
can select any PFI pin as the source for GPCTR1_GATE and configure the
polarity selection for either rising or falling edge. You can use the gate
signal in a variety of different applications to perform such actions as
starting and stopping the counter, generating interrupts, saving the counter
contents, and so on.
As an output, GPCTR1_GATE monitors the actual gate signal connected to
general-purpose counter 1, even if the gate is being externally generated by
another PFI. This output is set to high-impedance at startup.
Figure 4-31 shows the timing requirements for the GPCTR1_GATE signal.
Figure 4-31. GPCTR1_GATE Signal Timing
Rising-Edge
Polarity
Falling-Edge
Polarity
t
w
= 10 ns minimum
t
w