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參數(shù)資料
| 型號： | TSC2111IRGZTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.4 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC48 |
| 封裝： | PLASTIC, QFN-48 |
| 文件頁數(shù)： | 73/99頁 |
| 文件大?。?/td> | 1143K |
| 代理商： | TSC2111IRGZTG4 |
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TSC2111
SLAS495A JUNE 2006 REVISED OCTOBER 2007
www.ti.com
75
REGISTER 24H: AGC for Cell-Phone Input Control
BIT
NAME
RESET
VALUE
READ/
WRITE
FUNCTION
D15
0
R
Reserved (Write only 0)
D14
AGCNF_CELL
0
R
Noise Threshold Flag.
The read values indicate the following
0 => Signal power greater than noise threshold
1 => Signal power is less than noise threshold
Note: Valid only if AGC is selected for the Cellphone input (CP_IN).
D13D11
AGCNL
000
R/W
AGC Noise Threshold.
These settings apply to both Headset/Aux/Handset and Cellphone input.
000 => 30 dB
001 => 30 dB
010 => 40 dB
011 => 50 dB
100 => 60 dB
101 => 70 dB (not valid for Cellphone AGC)
110 => 80 dB (not valid for Cellphone AGC)
111 => 90 dB (not valid for Cellphone AGC)
D10D9
AGCHYS_CELL
00
R/W
AGC Hysteresis Selection for Cellphone Input
00 => 1 dB
01 => 2 dB
10 => 4 dB
11 => No Hysteresis
D8
CLPST_CELL
0
R/W
AGC Clip Stepping Disable for Cellphone Input
0 => Disable clip stepping for cell-phone input
1 => Enable clip stepping for cell-phone input
D7D5
AGCTG_CELL
000
R/W
AGC Target Gain for Cellphone 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_CELL
0000
R/W
AGC Time Constant for Cell 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
10
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_CELL
0
R/W
AGC Enable for Cellphone Input
0 => AGC is off for Cellphone input
1 => AGC is on for Cellphone input
(Cell PGA is controlled by AGC
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