Datasheet

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6.4.1 Interface Indicator
6.4.2 Firmware Information
6.4.3 Device Connected Indicator
6.4.4 Device Reset Controls
6.4.5 Update Buttons Control
6.5 Digital Audio Data/DAC Tab
6.5.1 DAC Controls
Kit Operation
At the top left of the screen is an Interface indicator. The TLV320DAC32 has an I
2
C interface. The
indicator is lit after the program begins.
To the right of the Interface indicator is a group box called Firmware. This box indicates where the
firmware being used is operating from — in this release, the firmware is on the USB-MODEVM, so
USB-MODEVM should be visible in the box labeled Located On:. The version of the firmware appears in
the Version box below this.
Below the Firmware group box, an indicator labeled DEVICE CONNECTED shows the status of the USB
connection. It the indicator is green, then the USB connection is good and the software is ready to use. If
the indicator is red, then there is an error and the software is not recognizing the EVM.
To the right, the next group box contains controls for resetting the TLV320DAC32. A software reset can be
done by writing to a register in the TLV320DAC32, and this is accomplished by pushing the button labeled
Software Reset. The TLV320DAC32 also may be reset by toggling a pin on the TLV320DAC32, which is
done by pushing the Hardware Reset button.
CAUTION
In order to perform a hardware reset, the RESET jumper (JMP9) must be
installed and SW2-7 on the USB-MODEVM must be turned OFF. Failure to do
either of these steps results in not generating a hardware reset or causing
unstable operation of the EVM, which may require cycling power to the
USB-MODEVM.
The DAC Overflow indicator lights when the overflow flags are set in the TLV320DAC32. These
indicators, as well as the other indicators on this panel, are updated only when the software's front panel
is inactive, once every 20ms. To the far right on this screen, the short-circuit indicators show when a
short-circuit condition is detected, if this feature has been enabled.
Near the left side of the screen is a button labeled Update Buttons. This button defaults to ON and can
be turned off it desired. The buttons allows for the software indicators (buttons, knobs, and dials) to be
automatically updated to reflect the device status when the device is configured by means of the
Command Line Interface (see Section 6.9.1 ).
The Audio Interface tab (Figure 2 ) sets up the audio data interface to the TLV320DAC32 and controls the
operation of the DAC.
On the left side of this tab are controls for the left and right DACs.
The DAC controls are set up to allow powering of each DAC individually, and setting the output level.
Each channel's level can be set independently using the corresponding Volume knob. Alternately, by
checking the Slave to Right box, the left channel Volume can be made to track the right channel Volume
knob setting; checking the Slave to Left box causes the right channel Volume knob to track the left
Volume knob setting.
10 TLV320DAC32EVM and TLV320DAC32EVM-PDK SLAU201 – November 2006
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