V270-EA11 DynamicSignals 6-Channel 16-Bit DAC

The V270 Digital-to-Analog Converter provides an interface between VXIbus and devices requiring analog inputs, allowing a computer to control such devices as gages, indicators, and displays. A single-width, C-size, register-based, VXIbus module, it contains six digital-to-analog channels, each with its own 16-bit converter. The DAC outputs are connected to a 50-contact connector on the module's front panel.

The V270 accepts binary data into a Rank 1 register (see block diagram) in two's complement format. Setting the module's Mode Control register determines whether this data is passed directly to the selected DAC channel or is held for subsequent, simultaneous conversion. For simultaneous conversion, all six channels of data can be copied into the Rank 2 registers by a signal applied to the front-panel LEMO connector. Data can also be transfe rred to the Rank 2 registers by a software command, regardless of the mode setting.

The V270 supports both static and dynamic configuration. Access to the dual-ported memory is via memory locations pointed to by the Offset Register within the VXIbus Configuration Register set, using A24/A16, D16 data transfers. All six channels are accessed through the same VXIbus address.