Texas Instruments PCM1681, User Manual

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SBAU137 – April 2008
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Demonstration Software
17
Using the Demonstration Software www.ti.com
2.3 Using the Demonstration Software
Open the working directory you created on the PC (see the Installation section). Double-click on the
application file named dem1608.exe . A window appears on your desktop screen, as shown in Figure 2-1 .
There are two menu selections (Execute and Window) in the menu bar near the top of the window.
Figure 2-1. Demonstration Software Window
The Execute menu includes three selections:
•
Initialize
instructs the program to write almost of the PCM1681 internal registers with the default values
•
Reset
instructs the program to rewrite the PCM1681 internal registers with the data currently selected
in the application window
This window and function is not applicable on the PCM1681:
• Exit
closes the application
The Window menu includes five options:
• Attenuation control (see Figure 2-2 ): enables users to control PCM1681 digital attenuation level by
changing the slider position for each channel.
•
Operation control (see Figure 2-3 ): allows users to control mute on/off and DAC operation
enable/disable by channel.
•
Function control (see Figure 2-4 ): controls various programmable functions, such as Interface formats,
oversampling mode, DAC output phase, de-emphasis function/frequency, and so forth. Some functions
are not available for the PCM1681; see Table 2-1 for details.
These windows and functions are not applicable on the PCM1681:
•
GPO control
•
Register read