Chapter 5
Counters
©
National Instruments Corporation
5-5
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.
Figure 5-5 shows the behavior of the Ctr0InternalOutput signal.
Figure 5-5.
Ctr0InternalOutput Signal Behavior
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 the following signals:
–
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
or the
LabVIEW 8.x Help
for more information.
Ctr0Source
Ctr0InternalOutput
(Pulse on TC)
Ctr0InternalOutput
(Toggle Output on TC)
TC
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