Data Translation DT3162, Руководство пользователя

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Digital I/O Signals
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Digital I/O Signals
DT3162 boards provide four dedicated digital input lines and four
dedicated digital output lines. Pins 1 to 4 of connector J2 on the
DT3162 board are provided for the digital input signals. Pins 6, 7, 8,
and 11 of connector J2 on the DT3162 board are provided for the
digital outputs. To access the digital I/O signals, use the STP15 screw
terminal panel and EP337 cable.
The digital I/O signals are simple register-driven, TTL-level signals
that you can use for any purpose, such as controlling or actuating
external devices. A bit value of 0 identifies a low TTL level; a bit value
of 1 identifies a high TTL level.
The DT3162 can generate a PCI-bus interrupt when one or more of
the digital input lines changes state. This feature is useful when you
want to monitor critical signals or when you want to signal the host
computer to transfer data to or from the board. You enable the
interrupts on a line-by-line basis using software.
You can use software to read or write to the digital I/O lines and to
determine which digital input lines changed state.