參數(shù)資料
型號: AK2307LV
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: SPEECH CODEC for Digital Key telephone (5.0V/3.3V)
中文描述: 語音編解碼器的數(shù)字按鍵電話(5.0V/3.3V)
文件頁數(shù): 15/39頁
文件大?。?/td> 468K
代理商: AK2307LV
ASAHI KASEI [AK2307/LV]
3-2 Voice path gain Controls
AK2307/LV provides the RX and TX voice gain control functions both in analog domain and in digital domain. These
gain
can be controlled from following five registers.
3-2-1. RX voice path gain controls
RX side voice path has three gain control blocks and two gain Pads. These gain stages are controlled
through following four registers, Path Control 2, RX digital Volume control, RX handset control, RX Headset
control and RX speaker control.
Path Control 2
Register Type : Read Write[Address:0001 D6-D5,D1-D0:(RX_Pad, Side_Tone,SW10-SW9)]
ADD
D7
D6
D5
D4
D3
1
RX
_Apad
_Pad
Tone
Default
0
1
0
0
0
RX_Apad ; Analog +3dB gain pad at three RX voice output amps. This gain for to get the extra
gain in the RX level diagram. This means, for example, the analog output will be equivalent to
one correspond to –7dBm0 digital code when this gain is enabled. However, please notice
the maximum analog output can not exceed the one which is defined in analog characteristics
specification. The three gain stages at each output can not be changed individually.
Name
Porarity
0
0dB
RX_Apad
1
+3dB
RX_Pad; A digital –9dB gain pad at D/A digital domain. This gain pad is for a gain adjustment between
the in-system call and the external call.
Name
Porarity
0
0dB
RX_Pad
1
-9dB
MS0190-E-05
2005/12
15
D2
u-law
A-law
0
D1
SW10
D0
SW9
RX
Side
PCM_1
PCM_0
0
0
Comment
default
Comment
default
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