[AK4675]
■ 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 10kΩ (min.). When the PMLO1=PMRO1=LOPS1 bits = “0”, LOUT1/ROUT1 enters
power-down mode and the output is pulled-down to VSS1 by 100kΩ(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 20kΩ after AC coupled as Figure 64. Rise/Fall
time is 300ms(max) at C=1μF and AVDD=3.3V. When PMLO1=PMRO1 bits = “1” and LOPS1 bit = “0”,
LOUT1/ROUT1 is in normal operation.
L1VL2-0 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
0
PMLO1
Mode
LOUT1 pin
0
1
0
1
Power-down
Normal Operation
Power-save
Pull-down to VSS1
Normal Operation
Fall down to VSS1
Rise up to VCOM
(default)
(default)
1
Power-save
Table 65. Stereo Line Output Mode Select (LOUT1)
LOPS1
0
PMRO1
Mode
ROUT1 pin
0
1
0
1
Power-down
Normal Operation
Power-save
Pull-down to VSS1
Normal Operation
Fall down to VSS1
Rise up to VCOM
1
Power-save
Table 66. Stereo Line Output Mode Select (ROUT1)
L1VL2-0
6H
Attenuation
+6dB
5H
0dB
(default)
4H
−6dB
3H
2H
1H
0H
−12dB
−18dB
−24dB
MUTE
Table 67. Stereo Line Output Volume Setting
LOUT1
ROUT1
1μF
220Ω
20kΩ
Figure 64. External Circuit for Stereo Line Output (in case of using Pop Noise Reduction Circuit)
MS0963-E-00
2008/05
- 92 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
