參數(shù)資料
型號: TLV320AIC28IRGZ
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): 55/85頁
文件大?。?/td> 1053K
代理商: TLV320AIC28IRGZ
TLV320AIC28
SLAS418B FEBRUARY 2004 REVISED MAY 2005
www.ti.com
59
REGISTER 1EH: Gain Control for Handset Input
BIT
NAME
RESET VALUE
READ/WRITE
FUNCTION
D15
ADMUT_HND
1
R/W
Handset Input Mute
1 => Handset Input Mute
0 => Handset Input not muted
Note: If AGC is enabled and handset Input is selected then
ADMUT_HND+ADPGA_HND will reflect gain being applied by AGC.
D14D8
ADPGA_HND
1111111
R/W
ADC Handset 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 handset Input is selected then
ADMUT_HND+ADPGA_HND will reflect 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
……….
11101000 => 12 dB
D7D5
AGCTG_HND
000
R/W
AGC Target Gain for Handset 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_HND
0000
R/W
AGC Time Constant for Handset Input.
These four bits set the AGC attack and decay time constants. Time
constants remain the 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_HND
0
R/W
AGC Enable for Handset Input
0 => AGC is off for Handset Input
(ADC PGA is controlled by ADMUT_HND+ADPGA_HND)
1 => AGC is on for Handset Input
(ADC PGA is controlled by AGC)
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