Counter 0 Internal Output Signal

The Counter 0 Internal Output (Ctr0InternalOutput) signal is the output of Counter 0. This signal reflects the terminal count (TC) of Counter 0. The counter generates a terminal count when its count value rolls over. The two software-selectable output options are pulse on TC and toggle output polarity on TC. The output polarity is software-selectable for both options. The following figure shows the behavior of the Ctr0InternalOutput signal.

You can use Ctr0InternalOutput in the following applications:

• In pulse generation mode, the counter drives Ctr0InternalOutput with the generated pulses. To enable this behavior, software configures the counter to toggle Ctr0InternalOutput on TC.
• Ctr0InternalOutput can control the timing of analog input acquisitions by driving:
  • ai/SampleClock
  • ai/StartTrigger
  • ai/ConvertClock
• Counter 0 and 1 can be daisy-chained together by routing Ctr0InternalOutput to Ctr1Gate.
• Ctr0InternalOutput can drive any of the RTSI <0..6> signals to control the behavior of other devices in the system.
• Ctr0InternalOutput drives the CTR 0 OUT pin to trigger or control external devices.
• Ctr0InternalOutput can drive other internal signals.

Refer to Device Routing in MAX in the NI-DAQmx Help for more information.

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. The following figure shows the relationship of CTR 0 OUT and Ctr0InternalOutput.