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6.11
AGC Tab
Kit Operation
When the control interface for the TLV320AIC33 is selected to be SPI, the Multifunction Pins groupbox
and controls within it are disabled, because these pins are used by the SPI bus. When in I
2
C mode,
however, these controls are enabled. The MFP3 Function control selects MFP3 to be used either as a
General Purpose Input or as the data input line for the alternate I
2
S bus. The MFP2 Function control
selects MFP2 as either Disabled or as a General Purpose Output. When used as an output, the MFP2
Output Level control sets the output state of the MFP2 pin either high or low. The states of the MFP0,
MFP1 and MP3 inputs are indicated by the three indicator lights on the right-hand side of this groupbox.
The AGC tab (see
) consists of two identical sets of controls, one for the left channel and the
other for the right channel. The AGC function is described in the
datasheet.
Figure 11. AGC Tab
The AGC can be enabled for each channel using the Enable AGC button. Target gain, Attack time in
milliseconds, Decay time in milliseconds, and the Maximum PGA Gain Allowed can all be set,
respectively, using the four corresponding knobs in each channel.
Noise gate functions, such as Hysteresis, Clip stepping, Threshold, and Signal and Noise Detect
debouncing are set using the corresponding controls in the Noise Gate groupbox for each channel.
SBAU114 – November 2005
TLV320AIC33EVM and TLV320AIC33EVM-PDK User's Guide
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