參數(shù)資料
型號(hào): AK4650
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi): Codec
英文描述: 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
中文描述: 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁(yè)數(shù): 25/86頁(yè)
文件大?。?/td> 824K
代理商: AK4650
[AK4650]
MS0502-E-01
2007/04
- 25 -
MIC Input
ADC
+20dB/0dB IPGA with ALC
HP, SP
MOUT+/
ATT
MICAD bit
MICM bit
MICL bit
ATT
ATTM bit
ATTS2-0 bits
MGAIN bit
IPGA5-0 bits
ALC1 bit
INT pin
EXT pin
MSEL bit
MDIF bit
AK4650
MICOUT pin
AIN pin
Figure 16. Microphone Input
The AK4650 has the following functions for Mic Input.
(1)
2 Inputs Selector. The switch configure is controlled by MDIF and MSEL bits (Table 9).
(2)
1
st
MIC Amplifier with +20dB gain, The gain can be selected ON/OFF by MGAIN bit (Table 10).
(3)
IPGA with ALC. This volume is controlled by IPGA5-0 bits (Table 14).
(4)
Attenuator for stereo mixer. The volume is controlled by ATTS2-0 bits (Table 7).
(5)
Attenuator for mono mixer. The attenuator level is 4dB and the ON/OFF is controlled by ATTM bit (Table 8).
ATTS2-0
Attenuation
0H
6dB
1H
9dB
2H
12dB
3H
15dB
4H
18dB
5H
21dB
6H
24dB
7H
27dB
Table 7. Attenuator Table (IPGA
Stereo Mixer)
ATTM
Attenuation
0
1
Table 8. Attenuator Table (IPGA
Mono Mixer)
STEP
(default)
3dB
(default)
0dB
4dB
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