Texas Instruments DEM-DAI3793A Manual Do Utilizador
www.ti.com
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
shown in
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.
then execute EVM3793A.exe.
There are four primary sections of the user interface panel (see
•
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.
modules are set to a power-down condition.
Click All Power On (the red box, as shown in
) 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).
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:
•
to power up and power down each module
•
executes gain control for ADC input
•
executes headphone/speaker gain control and digital ATT
•
tunes the Automatic Level Control function
•
adjusts the tone control and notch filter coefficient
•
controls DAC oversampling, de-emphasis, and high-pass filtering
•
selects analog input, differential input, and analog mixer
•
selects the audio interface for ADC and DAC
•
controls headphone short detection and speaker thermal protection
•
tune switching frequency for digital amplifier
This section discusses each of these tab operations and controls.
SBAU127 – July 2007
Set-Up Guide
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