TLV320AIC28
SLAS418B FEBRUARY 2004 REVISED MAY 2005
www.ti.com
52
REGISTER 02H: CODEC DAC Gain Control
BIT
NAME
RESET
VALUE
READ/
WRITE
FUNCTION
D15
DALMU
1
R/W
DAC Left Channel Mute
1 => DAC Left Channel Muted
0 => DAC Left Channel not muted
D14D8
DALVL
1111111
R/W
DAC Left Channel Volume Control
0000000 => DAC left channel volume = 0 dB
0000001 => DAC left channel volume = 0.5 dB
…..
1111110 => DAC left channel volume = 63.0 dB
1111111 => DAC left channel volume = 63.5 dB
D7
DARMU
1
R/W
DAC Right Channel Mute
1 => DAC Right Channel Muted
0 => DAC Right Channel not muted
D6D0
DARVL
1111111
R/W
DAC Right Channel Volume Control
0000000 => DAC right channel volume = 0 dB
0000001 => DAC right channel volume = 0.5 dB
…..
1111110 => DAC right channel volume = 63.0 dB
1111111 => DAC right channel volume = 63.5 dB
REGISTER 03H: Mixer PGA Control
BIT
NAME
RESET
VALUE
READ/
WRITE
FUNCTION
D15
ASTMU
1
R/W
Analog Sidetone Mute Control
1 => Analog sidetone mute
0 => Analog sidetone not muted
D14D8
ASTG
1000101
R/W
Analog Sidetone Gain Setting
0000000 => Analog sidetone = 34.5 dB
0000001 => Analog sidetone = 34 dB
0000010 => Analog sidetone = 33.5 dB
...
1000101 => Analog sidetone = 0 dB
1000110 => Analog sidetone = 0.5 dB
...
1011100 => Analog sidetone = 11.5 dB
1011101 => Analog sidetone = 12 dB
1011110 => Analog sidetone = 12 dB
1011111 => Analog sidetone = 12 dB
11xxxxx => Analog sidetone = 12 dB
D7D5
MICSEL
000
R/W
Selection for Mic Input and Aux Input for ADC/Cell phoneoutput/Analog sidetone.
000 => Single-ended input MICIN_HED selected
001 => Single-ended input MICIN_HND selected
010 => Single-ended input AUX1 selected
011 => Single-ended input AUX2 selected
100 => Differential input MICIN_HED and AUX1 connected to ADC.
101 => Differential input MICIN_HED and AUX2 connected to ADC.
110 => Differential input MICIN_HND and AUX1 connected to ADC.
111 => Differential input MICIN_HND and AUX2 connected to ADC.
Note: When D7=1 (differential input selected), analog sidetone path is not valid
D4
MICADC
0
R/W
Selection of ADC input
0 => Nothing connected
1 => Input selected by MICSEL connected to ADC.
D3
CPADC
0
R/W
Connects Cell phone input to ADC
0 => Cell phone input not connected to ADC.
1 => Cell phone input connected to ADC.
D2D1
Reserved
0’s
R
Reserved
D0
ASTGF
0
R
Analog Sidetone PGA Flag (Read Only)
0 => Gain Applied
≠ PGA Register setting
1 => Gain Applied = PGA register setting.
Note: This flag indicates when the softstepping for analog sidetone is completed.