參數資料
型號: AK4671
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/垃圾車/惠普腺苷
文件頁數: 83/164頁
文件大?。?/td> 1792K
代理商: AK4671
[AK4671]
MS0666-E-00
2007/10
- 83 -
Stereo Line Output (LOUT1/ROUT1 pins)
When DACL and DACR bits are “1”, Lch/Rch signal of DAC is output from the LOUT1/ROUT1 pins which is
single-ended. When DACL and DACR bits are “0”, output signal is muted and LOUT1/ROUT1 pins output VCOM
voltage. The load impedance is 10k
Ω
(min.). When the PMLO1=PMRO1=LOPS1 bits = “0”, LOUT1/ROUT1 enters
power-down mode and the output is pulled-down to VSS1 by 100k
Ω
(typ). When the LOPS1 bit is “1”, LOUT1/ROUT1
enters power-save mode. Pop noise at power-up/down can be reduced by changing PMLO1 and PMRO1 bits at LOPS1
bit = “1”. In this case, output signal line should be pulled-down to VSS1 by 20k
Ω
after AC coupled as
Figure 65
. Rise/Fall
time is 300ms(max) at C=1
μ
F and AVDD=3.3V. When PMLO1=PMRO1 bits = “1” and LOPS1 bit = “0”,
LOUT1/ROUT1 is in normal operation.
L1VL3-0 bits control the volume of LOUT1/ROUT1.
When LOM bit = “1”, DAC output signal is output to LOUT1 and ROUT1 pins as (L+R) mono signal.
When LOOPM bit = “1”, the MIC-Amp signal is output to LOUT1 and ROUT1 pins as (L+R) mono signal.
LOPS1
PMLO1
Mode
0
Power-down
0
1
Normal Operation
0
Power-save
1
1
Power-save
Table 65. Stereo Line Output Mode Select (LOUT1)
LOPS1
PMRO1
Mode
0
Power-down
0
1
Normal Operation
0
Power-save
1
1
Power-save
Table 66. Stereo Line Output Mode Select (ROUT1)
L1VL2-0
Attenuation
6H
+6dB
5H
4H
6dB
3H
12dB
2H
18dB
1H
24dB
0H
MUTE
Table 67. Stereo Line Output Volume Setting
LOUT1 pin
Pull-down to VSS1
Normal Operation
Fall down to VSS1
Rise up to VCOM
(default)
ROUT1 pin
Pull-down to VSS1
Normal Operation
Fall down to VSS1
Rise up to VCOM
(default)
(default)
0dB
LOUT1
ROUT1
1
μ
F
220
Ω
20k
Ω
Figure 65. External Circuit for Stereo Line Output (in case of using Pop Noise Reduction Circuit)
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相關代理商/技術參數
參數描述
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