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4.10 AGC Tab

TLV320AIC3104EVM Software

Figure 12. AGC Tab

The AGC tab (see Figure 12) 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 TLV320AIC3104 data sheet.

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.

The TLV320AIC3104 allows for the Attack and Decay times of the AGC to be set up in two different

modes, standard and advanced. The Left/Right AGC Settings button determines the mode selection.

The Standard mode provides several preset times that can be selected by adjustments made to the

Attack and Decay knobs. If finer control over the times is required, then the Advanced mode is selected

to change to the settings. When the Advanced mode is enabled, two tabs should appear that allow

separate, advanced control of the Attack and Delay times of the AGC (see Figure 13 and Figure 14).

These options allow selection of the base time as well as a multiplier to achieve the actual times shown in

the corresponding text box. The Use advanced settings? button should be enabled to program the

registers with the correct values selected via the pulldown options for base time and multiplier.

SLAU218 – August 2007

TLV320AIC3104EVM and TLV320AIC3104EVM-PDK

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