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Digital I/O
AO Series devices contain eight lines of bidirectional DIO signals that support the following
features:
•
Direction and function of each terminal, individually controllable
•
High-speed digital waveform generation (NI 6731/6733 only)
•
High-speed digital waveform acquisition (NI 6731/6733 only)
Figure 4-1 shows the circuitry of one DIO line.
DO Sample Clock
DO.x Direction Control
DI Sample Clock
The DIO terminals are named P0.<0..7> on the I/O connector.
The voltage input and output levels and the current drive levels of the DIO lines are listed in the
specifications of your device.
Figure 4-1. AO Series Digital I/O Block Diagram
DO Waveform
Generation FIFO
Static DO
Buffer
DI Waveform
Measurement
FIFO
Static DI
4
Weak Pull-Up
I/O Protection
© National Instruments | 4-1
P0.x
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