MS6714
MOSA
4 Stereo Inputs / 2 Channels Output Audio Processor
Interface Protocol
The format consists of the following
‧A START condition
‧A chip address byte including the MS6714 address. (7bits)
‧The 8th bit of the byte must be “0”.(write=0, read=1)
‧MS6714 must always acknowledge the end of each transmitted byte.
‧A data sequence (N-bytes + Acknowledge)
‧A STOP condition
SDA
SCL
1-7
8
9
1-7
8
9
1-7
8
9
S
P
--
R / W
START
CONDITION
STOP
CONDITION
ADDRESS
ACK
DATA
ACK
DATA
ACK
Address Code
The chip address of the MS6714 is 88H.
1
0
0
0
1
0
0
0
7 bits address
MS6714 address
W
Data Bytes Description
The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers
are mute and the gains of the input stage, the bass and the treble are 0dB.
MSB
LSB
A0
A0
A0
S0
Function
0
1
1
0
0
0
0
1
1
1
1
1
B2
0
B1
B1
B1
G1
0
B0
B0
B0
G0
C3
C3
A2
A2
A2
S2
A1
A1
A1
S1
Volume Control
Speaker ATT L
Speaker ATT R
Audio Switch
Bass Control
1
0
1
C2
C2
C1
C1
C0
C0
1
1
Treble Control
Where Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; Gx = 3.75dB steps
REV1.0
9
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MOSA [ MOSA ELECTRONICS ]
