MS6864_1 Datasheet, PDF (13/21 Pages) MOSA ELECTRONICS – Dual 2W Power Amplifier, I2C interface Stereo Input with Volume Control

MOSA
MS6864
Dual 2W Power Amplifiers with Volume Control
OPERATION PROCEDURE
The sequence of operation: power on→ active → power down → active → power off. The basic flowcharts are as
follows:
For HP mode and HP/BTL mode
Power On
Activating
Power Down
(Shut Down)
Power Off
All the Digital Interface Signals
Pull Low
I2C pull low
VDD = GND
Power On
VDD = Supply voltage
Default Status
[Attenuation & Mute]
Mute on (max attenuation)
[ Input Gain ]
0dB
[ Power Down Mode ]
All are power down status
[ Output Mode]
BTL mode
Setting Input Gain Is Fixed
[ Enable Input & Input Gain ]
Code: Lch 100xxx00
Rch 101xxx00
Disable Power Down
[ Power Down Mode ]
Code: 11010011 (D3h)
Wait 0.5 sec
CAPPD = 0
[ Power Down Mode ]
Code: 11010010 (D2h)
Wait 0.5 sec
PDPR = 0
[ Power Down Mode ]
Code: 11010000 (D0h)
Wait 0.5 sec
Volume Down To Mute
Input Channels Mute On
[ Attenuation and Mute ]
Code: Lch 00111111 (3Fh)
Rch 01111111 (7Fh)
Power Down Preparation
[ Power Down Mode ]
Code: 11010010 (D2h)
[ Disable Input & Gain = 0dB]
Code: Lch 10000011 (83h)
Rch 10100011 (a3h)
wait 7 sec
Power Down All The Devices
Only CAPPD Keep Activating
[ Power Down Mode ]
Code: 11011110 (DEh)
Keep All The Digital Interface
Signals Unchanged
Mute Off And Volume Up/Down
Step By Step
[ Attenuation and Mute ]
Code: Lch 00xxxxxx
Rch 01xxxxxx
Volume Down To Mute
Input Channels Mute On
[ Attenuation and Mute ]
Code: Lch 00111111 (3Fh)
Rch 01111111 (7Fh)
Power Down Preparation
[ Power Down Mode ]
Code: 11010010 (D2h)
[ Disable Input & Gain = 0dB]
Code: Lch 10000011 (83h)
Rch 10100011 (a3h)
wait 7 sec
Power Down All The Devices
Pull Down CAP Pin To Ground
[ Power Down Mode ]
Code: 11011111 (DFh)
All The Digital Interface Signals
Pull Low
I2C pull low
Power Off
Disconnect VDD
VDD will be fell down to 0V
REV 2
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