MS6334/6335
MOSA
OPERATION PROCEDURE
16-Bit Stereo Audio DAC integrated HP Driver with Volume Control
The sequence of operation: power on→ active → power down → active → power off. The basic flowcharts are as
follows:
Power Down
(Shut Down)
Power Turn On
Active
Power Off
All the Digital Interface Signals
Pull Low
I2C pull low
Audio Format Selection
Right justified: 80H (default)
I2S: 81H
Volume Control
volume down to mute
both 2 channels mute on
Active mode
All Devices are active
Audio inputs pull low
(BCK, WS, DATA)
VDD = GND
Volume Control
volume down to mute
both 2 channels mute on
Power up
Code : 6DH
Power Down
code : 6FH
All devices are not active
except CAPPD keep active
Wait 1sec
Power On
VDD = Supply voltage
Code : 61H
All Devices are active
Default Codes Inside The Chip
Volume control :00H
Power Off Preparation
code : 82H or 83H
wait 0.2 sec
Power down : 7FH
Audio format : 80H
Keep All the Digital Interface
Signals unchanged
Default Status
DAC Mute Off
Code : 60H
The chip is in the power down
mode, all devices are not active
Volume Mute On
Power Down
code : 6FH
All devices are not active except
CAPPD keep active
Volume Control
Default volume = mute
Volume up/down step by step
All the Digital Interface Signals
Pull Low
I2C pull low
Audio inputs pull low
(BCK, WS, DATA)
Power Off
Disconnect VDD
VDD will be down to 0V
Fig.6 Operational procedure
REV 1.0
12
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