參數(shù)資料
型號(hào)： AK4671EG
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： Stereo CODEC with MIC/RCV/HP-AMP
中文描述： 立體聲編解碼器麥克風(fēng)/垃圾車/惠普腺苷
文件頁數(shù)： 76/164頁
文件大?。?/td> 1792K
代理商： AK4671EG
[AK4671]
MS0666-E-00
2007/10
- 76 -
■
Digital Volume for Recording of Received Voice (DATT-B)
The AK4671 has a digital output volume (DATT-B: 256 levels, 0.5dB step, Mute) for recording of received voice. The
volume can be set by the BVL7-0 bits. The volume is included in front of an SRC-B block. The input data of SRC-B is
changed from +12 to –115dB or MUTE. This volume has a soft transit function. The transition time between set values of
BVL7-0 bits is 256/fs2. It takes 256/fs2 (=32ms@fs2=8kHz) from 00H (+12dB) to FFH (MUTE).
BVL7-0
00H
01H
02H
:
(default)
18H
:
FDH
114.5dB
FEH
115.0dB
FFH
MUTE (
∞
)
Table 38. Digital Volume B Code Table
■
Digital Volume for Received Voice (DATT-C)
The AK4671 has a digital output volume (DATT-C: 256 levels, 0.5dB step, Mute) for received voice. The volume can be
set by the CVL7-0 bits. The volume is included in front of SDTOB output. The input data of SRC-C is changed from +12
to –115dB or MUTE. This volume has a soft transition function. The transition time between set values of CVL7-0 bits is
256/fs2. It takes 256/fs2 (=32ms@fs2=8kHz) from 00H (+12dB) to FFH (MUTE).
CVL7-0
00H
01H
02H
:
(default)
18H
:
FDH
114.5dB
FEH
115.0dB
FFH
MUTE (
∞
)
Table 39. Digital Volume C Code Table
■
Side Tone Volume for B/T Phone Call (SVOLB)
The AK4671 has the side tone volume (5 levels, 6dB step) for B/T phone call. The volume can be set by the SVL2-0 bits.
The volume is included at mixing path from SRC-A to DATT-C. The output data of SRC-A is changed from 0 to –24dB.
SVB2-0
0H
1H
6dB
2H
12dB
3H
18dB
4H
24dB
Others
Table 40. Side Tone Volume B Code Table (N/A: Not available)
Gain
+12.0dB
+11.5dB
+11.0dB
:
0dB
:
Step
0.5dB
Gain
+12.0dB
+11.5dB
+11.0dB
:
0dB
:
Step
0.5dB
Gain
0dB
(default)
N/A
相關(guān)PDF資料
PDF描述
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