參數(shù)資料
型號： TLV320AIC29IRGZTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQCC48
封裝： 7 X 7 MM, GREEN, PLASTIC, QFN-48
文件頁數(shù)： 49/87頁
文件大?。?/td> 1051K
代理商： TLV320AIC29IRGZTG4
TLV320AIC29
SLAS494B DECEMBER 2005 REVISED OCTOBER 2007
www.ti.com
53
REGISTER 01H: Gain Control for Headset/Aux Input
BIT
NAME
RESET
VALUE
READ/
WRITE
FUNCTION
D15
ADMUT_HED
1
R/W
Headset/Aux Input Mute
1 => Headset/Aux Input Mute
0 => Headset/Aux Input not muted
Note: If AGC is enabled and Headset/Aux Input is selected then ADMUT_HED+ADPGA_HED
reflects gain being applied by AGC.
D14D8
ADPGA_HED
1111111
R/W
ADC Headset/Aux PGA Settings
0000000 => 0 dB
0000001 => 0.5 dB
0000010 => 1.0 dB
………
1110110 => 59.0 dB
..........
1111111 => 59.5 dB
Note: If AGC is enabled and Headset/Aux Input is selected then ADMUT_HED+ADPGA_HED
reflects gain being applied by AGC.
If AGC is on, the decoding for read values is as follows
01110111 => +59.5 dB
01110110 => +59.0 dB
………
00000000 => 0 dB
……….
11101001 => 11.5 dB
11101000 => 12 dB
D7D5
AGCTG_HED
000
R/W
AGC Target Gain for Headset/Aux Input. These three bits set the AGC’s targeted ADC output
level.
000 => 5.5 dB
001 => 8.0 dB
010 => 10 dB
011 => 12 dB
100 => 14 dB
101 => 17 dB
110 => 20 dB
111 => 24 dB
D4D1
AGCTC_HED
0000
R/W
AGC Time Constant for Headset/Aux Input. These four bits set the AGC attack and decay time
constants. Time constants remain same irrespective of any sampling frequency
Attack time
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_HED
0
R/W
AGC Enable for Headset/Aux Input
0 => AGC is off for Headset/Aux Input
(ADC Headset/Aux PGA is controlled by ADMUT_HED+ADPGA_HED)
1 => AGC is on for Headset/Aux Input
(ADC Headset/Aux PGA is controlled by AGC)
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