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4.2 Front Page Indicators and Functions
TLV320AIC34EVM Software
Figure 2 illustrates the main screen of the EVM software. The indicators and buttons located above the
tabbed section of the front page are visible regardless of which tab is currently being selected.
At the top left of the screen is an Block Select control. This control allows the user to select either Block
A or Block B as the target for the GUI controls. When the Block A indicator is green the register writes use
the I2C address for Block A. Likewise, When the Block B indicator is green the register writes use the I2C
address for Block B.
To the right of the Block Select control 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 the user
should see USB-MODEVM in the box labeled Located On:. The version of the firmware appears in the
Version box below this.
To the right, the next group box contains controls for resetting the TLV320AIC34EVM. A software reset
can be done by writing to a register in the TLV320AIC34EVM, and this is accomplished by pushing the
button labeled Software Reset. The TLV320AIC34EVM also may be reset by toggling a pin on the
TLV320AIC34EVM, which is done by pushing the Hardware Reset button. JMP19 on the EVM is installed
to allow the reset to reach the TLV320AIC34.
CAUTION
The GUI software does NOT keep track of register settings when toggling
between Block A and Block B. When using both Block A and Block B register
updates it is recommended to either use I
2
C scripts for both blocks or use GUI
controls for one block and I
2
C scripts for the other block. Toggling between
Block A and Block B is not recommended.
Below the Firmware box, the Device Connected LED should be green when the EVM is connected. If the
indicator is red, the EVM is not properly connected to the PC. Disconnect the EVM and verify that the
drivers were correctly installed, then reconnect and try restarting the software.
One the upper right portion of the screen, several indicators are located which provide the status of
various portions of the TLV320AIC34. These indicators are activated by pressing the Indicator Updates
button below the Device Connected LED. 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.
The ADC Overflow and DAC Overflow indicators light when the overflow flags are set in the
TLV320AIC34. Below these indicators are the AGC Noise Threshold Exceeded indicators that show
when the AGC noise threshold is exceeded. To the far right of the screen, the Short Circuit Detect
indicators show when a short-circuit condition is detected, if this feature has been enabled. Below the
short-circuit indicators, the AGC Gain Applied indicators use a bar graph to show the amount of gain
which has been applied by the AGC, and indicators that light when the AGC is saturated.
SLAU232 – December 2007 TLV320AIC34EVM-K 11
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