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參數資料
型號: TWL1110PBSR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP32
封裝: PLASTIC, QFP-32
文件頁數: 25/40頁
文件大小: 564K
代理商: TWL1110PBSR
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 VCC level.
When set to default, the following features are activated:
D REF is powered up
D Ear Amp1 selected, Ear Amp 2 = OFF
D Receive channel enabled
D MIC bias enabled
D MIC 2 selected
D Transmit channel enabled
D Side tone enabled – Gain = –12 dB
D TX channel high pass filter disabled
D TX channel slope filter enabled
D RX channel HP filter disabled (low pass only)
D Buzzcon disabled
D Linear mode only
D TX and RX channel normal mode (no loopback)
D Tone mode disabled (voice mode only)
D MIC Amp 1 gain = 23.5 dB
MIC Amp 2 gain
=
6 dB
TX PGA gain
=
0 dB
Total TX gain
=
29.5 dB
D Receive PGA
=
– 4 dB
Receive PGA 2
=
0 dB
Volume
=
0 dB
Total RX gain
=
– 4 dB
D Clock = 2.048 MHz
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相關代理商/技術參數
參數描述
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