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National Instruments Corporation
7-1
7
Digital Routing
The digital routing circuitry manages the flow of data between the bus
interface and the acquisition subsystems (analog input 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 the following:
•
Your E Series device
•
Other devices in your system through RTSI
•
User input through the PFI pins
For a detailed description of which routes are possible on your device,
in Measurement & Automation Explorer (MAX), select
Devices and
Interfaces
, your device, then select the
Device Routes
tab.
Timing Signal Routing
The DAQ-STC provides a flexible interface for connecting timing signals
to other devices or external circuitry. The E Series devices use the RTSI
bus to interconnect timing signals between devices (PCI and PXI buses
only) and the PFI pins on the I/O connector to connect the device to
external circuitry. These connections enable the device both to control and
be controlled by other devices and circuits.
You can control 17 timing signals internal to the DAQ-STC by an external
source:
•
AI Start Trigger Signal
•
AI Reference Trigger Signal
•
AI Sample Clock Signal
•
AI Convert Clock Signal
•
AI Pause Trigger Signal
•
AI Sample Clock Timebase Signal
