ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 65

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

<Stereo Line Output Control Sequence (in case of using Pop Reduction Circuit)>
MS0625-E-01
(1) Set LOPS bit = “1”. Stereo line output enters the power-save mode.
(2) Set PMLO bit = “1”. Stereo line output exits the power-down mode.
(3) Set LOPS bit = “0” after LOUT and ROUT pins rise up. Stereo line output exits the power-save mode.
(4) Set LOPS bit = “1”. Stereo line output enters power-save mode.
(5) Set PMLO bit = “0”. Stereo line output enters power-down mode.
(6) Set LOPS bit = “0” after LOUT and ROUT pins fall down. Stereo line output exits the power-save mode.
P M L O b it
L O P S b it
L O U T , R O U T p in s
LOUT and ROUT 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.
LOUT and ROUT pins fall down to VSS1. Fall time is 200ms (max. 300ms) at C=1 μ F and AVDD=3.3V.
Figure 45. External Circuit for Stereo Line Output (in case of using Pop Reduction Circuit)
Figure 46. Stereo Line Output Control Sequence (in case of using Pop Reduction Circuit)
( 1 )
( 2 )
≥ 3 0 0 m s
( 3 )
ROUT pin
LOUT pin
N o r m a l O u tp u t
- 65 -
1μF
220Ω
20kΩ
( 4 )
( 5 )
≥ 3 0 0 m s
( 6 )
[AK4648]
2007/06