tlv320aic26 Datasheet, PDF (42/63 Pages) Texas Instruments – LOW POWER STEREO AUDIO CODEC WITH HEADPHONE/SPEAKER AMPLIFIER AND 12-BIT BATTERY / TEMPERATURE / AUXILIARY ADC

TLV320AIC26
SLAS412− DECEMBER 2003
www.ti.com
BIT
D4−D1
NAME
AGCTC
D0
AGCEN
READ/
WRITE
R/W
R/W
RESET
VALUE
0000
0
FUNCTION
AGC Time Constant. These four bits set the AGC attack and decay time constants.
Time constants remain the same irrespective of any sampling frequency.
Attack Time (ms)
0000
8
0001 11
0010 16
0011 20
0100
8
0101 11
0110 16
0111 20
1000
8
1001 11
1010 16
1011 20
1100
8
1101 11
1110 16
1111 20
Decay Time (ms)
100
100
100
100
200
200
200
200
400
400
400
400
500
500
500
500
AGC Enable
0 => AGC is off
1 => AGC is on
(ADC PGA is controlled by D15−D8 ADC PGA Control)
(ADC PGA is controlled by AGC)
REGISTER 02H: CODEC DAC Gain Control
READ/
BIT
NAME
WRITE
D15
DALMU
R/W
D14−D8 DALVL
R/W
RESET
VALUE
1
1111111
FUNCTION
DAC Left Channel Muted
1 => DAC left channel muted
0 => DAC left channel not muted
DAC Left Channel Volume Control
0000000 => DAC left channel volume control = 0 dB
0000001 => DAC left channel volume control = −0.5 dB
0000010 => DAC left channel volume control = −1.0 dB
−−−−−
1111110 => DAC left channel volume control = −63.0 dB
1111111 => DAC left channel volume control = −63.5 dB
D7
DARMU
R/W
D6−D0 DARVL
R/W
1
1111111
DAC Right Channel Muted
1 => DAC right channel muted
0 => DAC right channel not muted
DAC Right Channel Volume Control
0000000 => DAC right channel volume control = 0 dB
0000001 => DAC right channel volume control = −0.5 dB
0000010 => DAC right channel volume control = −1.0 dB
−−−−−
1111110 => DAC right channel volume control = −63.0 dB
1111111 => DAC right channel volume control = −63.5 dB
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