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8 lines
744 B
8 lines
744 B
7 years ago
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\section{Digital Input Unit}
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The digital input unit is the input counterpart of the digital output unit.
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In addition to reading the immediate digital levels of the selected pins, this unit can generate asynchronous events on a pin change. The state of the entire input port, together with a microsecond timestamp (as is the case for all asynchronous events), is reported to the host either on a rising, falling, or any pin change.
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The pin change event can be configured independently for each pin. In order to receive a pin change event, it must be armed first; The pin can be armed for a single event, or it may be re-armed automatically with a hold-off time. It's further possible to automatically arm selected pin triggers on start-up.
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