©
National Instruments Corporation
7-1
Analog Output Series User Manual
7
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
