參數(shù)資料
型號: TWL1110TQFP
廠商: Texas Instruments, Inc.
英文描述: VOICE-BAND AUDIO PROCESSOR VBAPE
中文描述: 語音頻帶音頻處理器VBAPE
文件頁數(shù): 31/37頁
文件大?。?/td> 496K
代理商: TWL1110TQFP
TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP
)
SLWS103 – NOVEMBER 2000
31
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
using VBAP as a general purpose voice codec
In situations when a general purpose voice codec is needed and programming features are not necessary, the
receive and transmit channels can be enabled for voice mode only by setting the powerup select pin to V
CC
level.
When set to default, the following features are activated:
REF is powered up
Ear Amp1 selected, Ear Amp 2 = OFF
Receive channel enabled
MIC bias enabled
MIC 2 selected
Transmit channel enabled
Side tone enabled – Gain = –12 dB
TX channel high pass filter disabled
TX channel slope filter enabled
RX channel HP filter disabled (low pass only)
Buzzcon disabled
Linear mode only
TX and RX channel normal mode (no loopback)
Tone mode disabled (voice mode only)
MIC Amp 1 gain
MIC Amp 2 gain
TX PGA gain
Total TX gain
=
=
=
=
23.5 dB
6 dB
0 dB
29.5 dB
Receive PGA
Receive PGA 2
Volume
Total RX gain
=
=
=
=
–4 dB
0 dB
0 dB
–4 dB
Clock = 2.048 MHz
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