參數(shù)資料
型號: TWL1101PFB
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: PLASTIC, TQFP-48
文件頁數(shù): 13/31頁
文件大小: 408K
代理商: TWL1101PFB
TWL1101
VOICE-BAND AUDIO PROCESSOR (VBAP
)
SLWS074A – MAY 1998 REVISED MARCH 1999
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
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 4. 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
receive volume control
The values in the volume control PGA control registers provide volume control into the earphone. Volume
control gain is set from 0 dB to –18 dB in 2-dB steps through the I2C interface. The default RX volume control
gain is 0 dB.
Table 5. rx Volume Control
BIT NAME
RELATIVE GAIN
RV3
RV2
RV1
RV0
MIN
TYP
MAX
UNIT
0
–0.2
0
0.2
dB
0
1
–2.2
–2
–1.8
dB
0
1
0
–4.2
–4
–3.8
dB
0
1
–6.2
–6
–5.8
dB
0
1
0
–8.2
–8
–7.8
dB
0
1
0
1
–10.2
–10
–9.8
dB
0
1
0
–12.2
–12
–11.8
dB
0
1
–14.2
–14
–13.8
dB
1
0
–16.2
–16
–15.8
dB
1
0
1
–18.2
–18
–17.8
dB
earphone amplifier
The analog signal can be routed to one of two earphone amplifiers: one with differential output (EAR1ON and
EAR1OP), or one with single-ended output (EAR2O) .
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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