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The CIO-DAS16 has 32 digital lines available. Eight digital I/O lines (4 inputs and 4 outputs) are accessed from the CIO-DAS16's main connector from the rear of the computer. The remaining 24 lines, which are programmable as inputs and outputs in groups of eight, are accessed through an auxiliary connector. A separate terminal panel and cable is required for the auxiliary connector.
Analog voltage output is provided by two 12-bit multiplying D/A converters which accept a reference voltage and provide a proportional output. A precision -5V reference from the A/D converter provides an on-board D/A range of 0-5V. Other ranges between +/-10V are possible if you supply a +/_10V external reference. A trigger is the event that begins an acquisition/transfer cycle. There are three ways to trigger a CIO-DAS16: software, internal or external. There are also three ways to transfer data from the CIO- DAS16: program, interrupt service routine or DMA.
For simultaneous sample and hold, the CIO-DAS16 works with the CIO-SSH16 simultaneous sample and hold accessory board.
The 8254 counter/timer chip has three counters of 16 bits each. Much of the 8254 is used by the CIO-DAS16 as a pacer clock to synchronize A/D conversion. One full counter (counter 0) is available for counting, pulse generation of frequency measurement. The output of counter 2 is available to provide external synchronization the the A/D converter or as a programmable rate source.
Optional software drivers are available for users writing their own programs. The UNIV-DRVR universal library packages provides support for both DOS, Windows 3.1 and Windows 95. DOS support includes QuickBasic 4.5, Visual Basic, Turbo C, Visual C++ and Microsoft C. Windows support includes Microsoft C, Visual C++, Visual Basic, Borland C, C++ and Delphi. 32-bit drivers are also available on special request. Optional Labview drivers are also available.
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