Datasheet


SLAS412− DECEMBER 2003
www.ti.com
42
BIT FUNCTION
RESET
VALUE
READ/
WRITE
NAME
D4−D1 AGCTC R/W 0000 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) Decay Time (ms)
0000 8 100
0001 11 100
0010 16 100
0011 20 100
0100 8 200
0101 11 200
0110 16 200
0111 20 200
1000 8 400
1001 11 400
1010 16 400
1011 20 400
1100 8 500
1101 11 500
1110 16 500
1111 20 500
D0 AGCEN R/W 0 AGC Enable
0 => AGC is off (ADC PGA is controlled by D15−D8 ADC PGA Control)
1 => AGC is on (ADC PGA is controlled by AGC)
REGISTER 02H: CODEC DAC Gain Control
BIT NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15 DALMU R/W 1 DAC Left Channel Muted
1 => DAC left channel muted
0 => DAC left channel not muted
D14−D8 DALVL R/W 1111111 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 1 DAC Right Channel Muted
1 => DAC right channel muted
0 => DAC right channel not muted
D6−D0 DARVL R/W 1111111 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