- Texas AIP Consumer Audio User's Guide
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3.2.2 Power On/Off Sequence
3.2.3 Module Function Controls
Software Control and Operation
Check to see that a Ready notation appears in the lower left-hand corner after successful I
2
C
communication is established. Otherwise, you will see an error box showing a communication error (as
shown in Figure 3-2 ).
Figure 3-2. Communication Error Message
If you received this message, confirm the set-up procedures and restart the software. Shut it down and
then execute EVM3793A.exe.
There are four primary sections of the user interface panel (see Figure 3-1 ):
• Module controller, for functions such as playback, signal processing, audio format, and so forth;
• Power on/off sequence controller
• Register setting history controller
• Register direct access controller
By default, each module is set without any of the checkboxes toggled in the Power Up/Down menu. All
modules are set to a power-down condition.
Click All Power On (the red box, as shown in Figure 3-3 ) to easily start EVM operation, instead of
powering up the module manually.
Figure 3-3. Power On/Off Sequence Function Buttons
Note: If pressing the Power On/Off sequence button has no effect, check to see that the two
files power_on.csv and power_off.csv are located in the same folder on the PC as the
EVM software (EVM3793A.exe).
The DEM-DAI3793A/3794A EVM controller software contains 10 tabs:
• Power Up/Down: to power up and power down each module
• Record: executes gain control for ADC input
• Playback: executes headphone/speaker gain control and digital ATT
• ALC: tunes the Automatic Level Control function
• Signal Processing 1: adjusts the tone control and notch filter coefficient
• Signal Processing 2: controls DAC oversampling, de-emphasis, and high-pass filtering
• Analog Path: selects analog input, differential input, and analog mixer
• Audio Interface: selects the audio interface for ADC and DAC
• Status Detect: controls headphone short detection and speaker thermal protection
• Digital Amp: tune switching frequency for digital amplifier
This section discusses each of these tab operations and controls.
SBAU127 – July 2007 Set-Up Guide 23
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