Datasheet

Micbias

MICBIAS

HPR

HPL

VOL/MICDET

Micpga

TLV320AIC3100

SLAS667A –NOVEMBER 2009–REVISED MAY 2012

www.ti.com

5.5.4.6 Example Setup for DRC

• PGA gain = 12 dB

• Threshold = –24 dB

• Hysteresis = 3 dB

• Hold time = 0 ms

• Attack rate = 1.9531e–4 dB per sample period

• Decay rate = 2.4414e–5 dB per sample period

Script

#Go to Page 0

w 30 00 00

#DAC => 12 db gain left

w 30 41 18

#DAC => 12 db gain right

w 30 42 18

#DAC => DRC Enabled for both channels, Threshold = -24 db, Hysteresis = 3 dB

w 30 44 7F

#DRC Hold = 0 ms, Rate of Changes of Gain = 0.5 dB/Fs'

w 30 45 00

#Attack Rate = 1.9531e-4 dB/Frame , DRC Decay Rate =2.4414e-5 dB/Frame

w 30 46 B6

#Go to Page 9

w 30 00 09

#DRC HPF

w 30 0E 7F AB 80 55 7F 56

#DRC LPF

W 30 14 00 11 00 11 7F DE

5.5.5 Headset Detection

The TLV320AIC3100 includes extensive capability to monitor a headphone, microphone, or headset jack,

to determine if a plug has been inserted into the jack, and then determine what type of

headset/headphone is wired to the plug. The device also includes the capability to detect a button press,

even, for example, when starting calls on mobile phones with headsets. Figure 5-34 shows the circuit

configuration to enable this feature.

Figure 5-34. Jack Connections for Headset Detection

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Product Folder Link(s): TLV320AIC3100