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Digital Routing
The digital routing circuitry manages the flow of data between the bus interface and the
acquisition subsystems (AO circuitry, digital I/O, and the counters). The digital routing circuitry
uses FIFOs (if present) in each subsystem to ensure efficient data movement.
The digital routing circuitry also routes timing and control signals. The acquisition subsystems
use these signals to manage acquisitions. These signals can come from:
•
your AO Series device
•
other devices in your system by way of RTSI
•
user input by way of the PFI pins
For a detailed description of which routes are possible on your device, click the Device Routes
tab in Measurement & Automation Explorer.
Timing Signal Routing
The DAQ-STC provides a flexible interface for connecting timing signals to other devices or
external circuitry. Your device uses the RTSI bus to interconnect timing signals between
devices, and it uses the programmable function interface (PFI) pins on the I/O connector to
connect the device to external circuitry. These connections are designed to enable your device
to both control and be controlled by other devices and circuits.
You can control the following timing signals internal to the DAQ-STC by an external source.
•
AO Start Trigger Signal
•
AO Pause Trigger Signal
•
AO Sample Clock Signal
•
AO Sample Clock Timebase Signal
•
DI Sample Clock Signal
•
DO Sample Clock Signal
•
Counter 0 Source Signal
•
Counter 0 Gate Signal
•
Counter 0 Up/Down Signal
•
Counter 1 Source Signal
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© National Instruments | 7-1
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