Ctr 0 Out Pin; Counter 0 Up/Down Signal; Counter 1 Source Signal - National Instruments 6711 User Manual

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CTR 0 OUT Pin

When the CTR 0 OUT pin is an output, the Ctr0InternalOutput signal drives the pin. As an input,
CTR 0 OUT can drive any of the RTSI <0..6> signals. CTR 0 OUT is set to high-impedance at
startup. Figure 5-6 shows the relationship of CTR 0 OUT and Ctr0InternalOutput.
Figure 5-6. CTR 0 OUT and Ctr0InternalOutput
Can Drive RTSI <0..6>
or other signals
Ctr0Gate
Ctr0InternalOutput
Counter 0
CTR 0 OUT
Ctr0Source
Ctr0Up/Down
Ctr0Out
Can Drive RTSI <0..6>

Counter 0 Up/Down Signal

You can externally input this signal on the P0.6 pin, but it is not available as an output on the I/O
connector. When you enable externally controlled count direction, Counter 0 counts down when
this pin is at a logic low and counts up when it is at a logic high. If you are using an external
signal to control the count direction, do not use the P0.6 pin for output. If you do not enable
externally controlled count direction, the P0.6 pin is free for general use.

Counter 1 Source Signal

You can select any PFI as well as many other internal signals as the Counter 1 Source
(Ctr1Source) signal. The Ctr1Source signal is configured in edge-detection mode on either rising
or falling edge. The selected edge of the Ctr1Source signal increments and decrements the
counter value depending on the application the counter is performing.
You can export the Counter 1 signal to the PFI 3/CTR 1 SOURCE pin, even if another PFI is
inputting the Ctr1Source signal. This output is set to high-impedance at startup.
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