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[AK4675]
MS0963-E-00
2008/05
- 101 -
ミ
Stereo Line Output 3 (LOUT3/ROUT3 pins)
When DACSL and DACSR bits are “1”, Lch/Rch signal of DAC is output from the LOUT3/ROUT3 pins which is
single-ended. When DACSL and DACSR bits are “0”, output signal is muted and LOUT3/ROUT3 pins output VCOM
voltage. The load impedance is 10k
Ω
(min.). When the PMLO3=PMRO3=LOPS3 bits = “0”, LOUT3/ROUT3 enters
power-down mode and the output is pulled-down to VSS1 by 100k
Ω
(typ). When the LOPS3 bit is “1”, LOUT3/ROUT3
enters power-save mode. Pop noise at power-up/down can be reduced by changing PMLO3 and PMRO3 bits at LOPS3
bit = “1”. In this case, output signal line should be pulled-down to VSS1 by 20k
Ω
after AC coupled as
. Rise/Fall
time is 300ms(max) at C=1
μ
F and AVDD=3.3V. When PMLO3=PMRO3 bits = “1” and LOPS3 bit = “0”,
LOUT3/ROUT3 is in normal operation.
L3VL3-0 bits control the volume of LOUT3/ROUT3.
When LOM3 bit = “1”, DAC output signal is output to LOUT3 and ROUT3 pins as (L+R) mono signal.
When LOOPM3 bit = “1”, the MIC-Amp signal is output to LOUT3 and ROUT3 pins as (L+R) mono signal.
LOPS3 PMLO3
Mode
LOUT3
pin
0
Power-down
Pull-down to VSS1
(default)
0
1
Normal Operation
Normal Operation
0
Power-save
Fall down to VSS1
1
1
Power-save
Rise up to VCOM
Table 70. Stereo Line Output Mode Select (LOUT3)
LOPS3 PMRO3
Mode
ROUT3
pin
0
Power-down
Pull-down to VSS1
(default)
0
1
Normal Operation
Normal Operation
0
Power-save
Fall down to VSS1
1
1
Power-save
Rise up to VCOM
Table 71. Stereo Line Output Mode Select (ROUT3)
L3VL1 L3VL0
Attenuation
1 1
+3dB
1 0 0dB
(default)
0 1
−
3dB
0 0
−
6dB
Table 72. Stereo Line Output Volume Setting
LOUT3
ROUT3
1
μ
F
220
Ω
20k
Ω
Figure 73. External Circuit for Stereo Line Output (when using Pop Noise Reduction Circuit)