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National Instruments Corporation
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NI cDAQ-9172 User Guide and Specifications
waiting for the Gate signal when it is armed. Counter output operations can
use the arm signal in addition to a start trigger.
Software can arm a counter or configure counters to be armed on a
hardware signal. Software calls this hardware signal the Arm Start Trigger.
Neutrally software routes the Arm Start Trigger to the Counter
n
HW Arm
input of the counter.
Routing Signals to Counter
n
HW Arm Input
You can route the following signals to the Counter
n
HW Arm input:
•
Any PFI terminal
•
ai/ReferenceTrigger
•
ai/StartTrigger
•
Analog Comparison Event
You can route Counter 1 Internal Output to Counter 0 HW Arm. You can
also route Counter 0 Internal Output to Counter 1 HW Arm.
Some of these options may not be available in some driver software.
Counter
n
Internal Output and Counter
n
TC Signals
Counter
n
TC is an internal signal that asserts when the counter value is 0.
The Counter
n
Internal Output signal changes in response to Counter
n
TC.
The two software-selectable output options are pulse output on TC and
toggle output on TC. The output polarity is software-selectable for both
options.
Routing Counter
n
Internal Output to an Output Terminal
You can route Counter
n
Internal Output to any output PFI terminal.
Frequency Output Signal
The Frequency Output (FREQ OUT) signal is the output of the frequency
output generator.
Routing Frequency Output to a Terminal
You can route Frequency Output to any output PFI terminal. The FREQ
OUT signal can also route to DO Sample Clock and DI Sample Clock.
Summary of Contents for NI 9203
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