ak4671 AKM Semiconductor, Inc., ak4671 Datasheet - Page 84

• Manufacturer Part Number: ak4671
• Description: Stereo Codec With Mic/rcv/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

<Stereo Line Output Control Sequence (in case of using Pop Noise Reduction Circuit)>
MS0666-E-00
(1) Set LOPS1 bit = “1”. Stereo line output enters the power-save mode.
(2) Set PMLO1=PMRO1 bits = “1”. Stereo line output exits the power-down mode.
(3) Set LOPS1 bit = “0” after LOUT1 and ROUT1 pins rise up. Stereo line output exits the power-save mode.
(4) Set LOPS1 bit = “1”. Stereo line output enters power-save mode.
(5) Set PMLO1=PMRO1 bits = “0”. Stereo line output enters power-down mode.
(6) Set LOPS1 bit = “0” after LOUT1 and ROUT1 pins fall down. Stereo line output exits the power-save mode.
P M L O 1 b it
P M R O 1 b it
L O P S 1 b it
L O U T 1 p in
R O U T 1 p in
Figure 66. Stereo Line Output Control Sequence (in case of using Pop Noise Reduction Circuit)
LOUT1 and ROUT1 pins rise up to VCOM voltage. Rise time is 200ms (max 300ms) at C=1 μ F and
AVDD=3.3V.
Stereo line output is enabled.
LOUT1 and ROUT1 pins fall down to VSS1. Fall time is 200ms (max 300ms) at C=1 μ F and AVDD=3.3V.
( 1 )
( 2 )
≥ 3 0 0 m s
( 3 )
N o r m a l O u tp u t
- 84 -
( 4 )
( 5 )
≥ 3 0 0 m s
( 6 )
[AK4671]
2007/10