Datasheet

TLV320AIC1110
SLAS359 – DECEMBER 2001
34
www.ti.com
PRINCIPLES OF OPERATION
using PCM codec as a general-purpose PCM codec
In situations when a general-purpose PCM codec is needed and programming features are not necessary, the
receive and transmit channels can be enabled for voice mode only by setting the powerup select pin to V
CC
level.
When set to default, the following features are activated:
 REF is powered up
 Ear amp1 selected, Ear amp 2 = OFF
 Receive channel enabled
 MIC bias enabled
 MIC 2 selected
 Transmit channel enabled
 Side tone enabled, Gain = –12 dB
 TX channel high pass filter disabled
 TX channel slope filter enabled
 RX channel HP filter disabled (low pass only)
 Buzzcon disabled
 Linear mode only
 TX and RX channel normal mode (no loopback)
 Tone mode disabled (voice mode only)
 MIC amp 1 gain = 23.5 dB
MIC amp 2 gain = 6 dB
TX PGA gain = 0 dB
Total TX gain = 29.5 dB
 Receive PGA = –4 dB
Receive PGA 2 = 0 dB
Volume = 0 dB
Total RX gain = –4 dB
 Clock = 2.048 MHz