[AK4753]
<Bypass Mode Control Sequence>
The AK4753 has a mute control output pin (MUTEN pin) for external speaker amplifier. In order to prevent a pop noise
through the AK4753, the MTUEN pin is connected to a mute pin or a standby pin of the external speaker amplifier.
H
BYPASS pin
L
H
MUTEN pin
L
ON
DSP Status
OFF
2ms 2ms
(typ) (typ)
2ms 2ms
(typ) (typ)
(1)
(3)
(4)
(5)
LOUT/ROUT
pins
(2)
(2)
Figure 45. Bypass Mode Control Sequence
(1) When the BYPASS pin turns “H”, the MUTEN pin is set “L”.
(2) Pop noise occuers after 2ms(@fs=48kHz), when the DSP bypass mode is changed.
(3) DSP bypass mode is chaneged, then the MUTEN pin is set “H” after 2ms(@fs=48kHz).
(4) When the BYPASS pin turns “L”, the MUTEN pin is set “L”.
(5) DSP bypass mode is chaneged, then the MUTEN pin is set “H” after 2ms(@fs=48kHz).
MS1311-E-00
2011/07
- 33 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
