AK4644 Datasheet, PDF (55/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV-AMP

ASAHI KASEI
[AK4644]
<Stereo Line Output Control Sequence (in case of using Pop Reduction Circuit)>
(2)
P M L O b it
(1)
(3)
LO P S bit
(5)
(4)
(6)
L O U T , R O U T p in s
N orm al O utput
≥ 300 m s
≥ 300 m s
Figure 46. Stereo Line Output Control Sequence (in case of using Pop Reduction Circuit)
(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.
LOUT and ROUT pins rise up to VCOM voltage. Rise time is 200ms (max 300ms) at C=1µF and
AVDD=3.3V.
(3) Set LOPS bit = “0” after LOUT and ROUT pins rise up. Stereo line output exits the power-save mode.
Stereo line output is enabled.
(4) Set LOPS bit = “1”. Stereo line output enters power-save mode.
(5) Set PMLO bit = “0”. Stereo line output enters power-down mode.
LOUT and ROUT pins fall down to AVSS. Fall time is 200ms (max 300ms) at C=1µF and AVDD=3.3V.
(6) Set LOPS bit = “0” after LOUT and ROUT pins fall down. Stereo line output exits the power-save mode.
MS0477-E-01
- 55 -
2006/10