參數(shù)資料
型號(hào): TWL1103TPBSRQ1
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP32
封裝: PLASTIC, TQFP-32
文件頁數(shù): 14/30頁
文件大?。?/td> 458K
代理商: TWL1103TPBSRQ1
TWL1103T Q1
VOICEBAND AUDIO PROCESSOR (VBAP)
SGLS120B APRIL 2002 REVISED APRIL 2008
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
receive operation
receive channel gain control
The values in the receive PGA control registers control the gain in the receive path. PGA gain is set from 6 dB
to 6 dB in 1-dB steps through the I2C interface. The default receive channel gain is 1 dB.
Table 5. Receive PGA Gain Control
BIT NAME
RELATIVE GAIN
RP3
RP2
RP1
RP0
MIN
TYP
MAX
UNIT
0
5.8
6
6.2
dB
0
1
4.8
5
5.2
dB
0
1
0
3.8
4
4.2
dB
0
1
2.8
3
3.2
dB
0
1
0
1.8
2
2.2
dB
0
1
0
1
0.8
1
1.2
dB
0
1
0
0.2
0
0.2
dB
0
1
1.2
1
0.8
dB
1
0
2.2
2
1.8
dB
1
0
1
3.2
3
2.8
dB
1
0
1
0
4.2
4
3.8
dB
1
0
1
5.2
5
4.8
dB
1
0
6.2
6
5.8
dB
sidetone gain control
The values in the sidetone PGA control registers control the sidetone gain. Sidetone gain is set from 12 dB
to 24 dB in 2-dB steps through the I2C interface. Sidetone can be muted by setting bit 7 of the power control
register. The default sidetone gain is 12 dB.
Table 6. Sidetone Gain Control
BIT NAME
RELATIVE GAIN
ST2
ST1
ST0
MIN
TYP
MAX
UNIT
0
12.2
12
11.8
dB
0
1
14.2
14
13.8
dB
0
1
0
16.2
16
15.8
dB
0
1
18.2
18
17.8
dB
1
0
20.2
20
19.8
dB
1
0
1
22.2
22
21.8
dB
1
0
24.2
24
23.8
dB
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