5.7 Microphone Volume Register (Index 0Eh) Mute Microphone Mute. Setting this bit mutes the MIC1 or MIC2 signal. The " />
參數(shù)資料
型號: CS4205-KQZ
廠商: Cirrus Logic Inc
文件頁數(shù): 24/81頁
文件大?。?/td> 0K
描述: IC CODEC AC97 I2S 48-LQFP
標準包裝: 250
類型: 音頻編解碼器 '97
數(shù)據(jù)接口: 串行
分辨率(位): 18,20 b
ADC / DAC 數(shù)量: 1 / 2
三角積分調(diào)變:
動態(tài)范圍,標準 ADC / DAC (db): 90 / 90
電壓 - 電源,模擬: 4.75 V ~ 5.25 V
電壓 - 電源,數(shù)字: 4.75 V ~ 5.25 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(9x9)
包裝: 托盤
產(chǎn)品目錄頁面: 754 (CN2011-ZH PDF)
其它名稱: 598-1182
CS4205
30
DS489PP4
5.7
Microphone Volume Register (Index 0Eh)
Mute
Microphone Mute. Setting this bit mutes the MIC1 or MIC2 signal. The selection of the MIC1
or MIC2 input pin is controlled by the MS bit in the General Purpose Register (Index 20h).
20dB
Microphone 20 dB Boost. When ‘set’, the 20dB bit enables the +20 dB microphone boost
block. In combination with the 10dB boost bit in the Misc. Crystal Control Register (Index 60h)
this bit allows for variable boost from 0 dB to +30 dB in steps of 10 dB. Table 6 summarizes
this behavior.
GN[4:0]
Microphone Volume Control. The GN[4:0] bits are used to control the gain level of the Micro-
phone input source to the Input Mixer. Each step corresponds to 1.5 dB gain adjustment, with
01000 = 0 dB. The total range is +12 dB to -34.5 dB gain. See Table 6 for further details.
Default
8008h. This value corresponds to 0 dB gain and Mute ‘set’.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
00000000
20dB
0
GN4
GN3
GN2
GN1
GN0
GN4 - GN0
Gain Level
10dB = 0,
20dB = 0
10dB = 1,
20dB = 0
10dB = 0,
20dB = 1
10dB = 1,
20dB = 1
00000
+12.0 dB
+22.0 dB
+32.0 dB
+42.0 dB
00001
+10.5 dB
+20.5 dB
+30.5 dB
+40.5 dB
...
00111
+1.5 dB
+11.5 dB
+21.5 dB
+31.5 dB
01000
0.0 dB
+10.0 dB
+20.0 dB
+30.0 dB
01001
-1.5 dB
+8.5 dB
+18.5 dB
+28.5 dB
...
11111
-34.5 dB
-24.5 dB
-14.5 dB
-4.5 dB
Table 6. Microphone Input Gain Values
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