Datasheet

Using the DAC9881EVM with DXP

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6.3 Software – Running DXP

Install DXP on a laptop or personal computer running Windows XP as per the detailed instruction in the

DXP User's Guide (SBAU146). Run the DXP program by clicking on the DXP icon on your desktop or by

browsing to your installation directory.

Before you can use DXP, a DAC EVM configuration file must be loaded. To load a configuration file,

select the desired DAC from the configuration list under the DAC menu. Choose the DAC configuration file

for the DAC9881 EVM as shown in Figure 11.

Figure 11. Loading the DAC9881EVM INI File

The DXP software defaults to output a 1-kHz sine wave from the DAC, other waveform options include

Square, Saw tooth, Triangle, and DC output options as described in the DXP User's Guide. GPIO options

are available on the DAC9881EVM which active either the RESET or power-down functions of the

DAC9881. These are shown inFigure 12 on the right side of the screen labeled GPIO-controlled DAC

Functions. Pressing the Reset button resets the DAC9881 outputs as described in the device data sheet.

Pressing the Power-Down button places the DAC9881 in low-power mode.

DAC9881 Evaluation Module SLAU279A–March 2009–Revised November 2009

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