MOSA
Interface Protocol
MS6714
4 Stereo Inputs / 2 Channels Output Audio Processor
The format consists of the following
‧A
START condition
‧A
chip address byte including the MS6714 address. (7bits)
‧The
8
th
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
START
CONDITION
ADDRESS
W
R / --
P
ACK
DATA
ACK
DATA
ACK
STOP
CONDITION
Address Code
The chip address of the MS6714 is 88H.
1
0
0
0
1
0
0
0
W
7 bits address
MS6714 address
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
0
1
1
0
0
0
0
1
1
1
1
1
B2
0
1
0
1
1
B1
B1
B1
G1
0
1
B0
B0
B0
G0
C3
C3
A2
A2
A2
S2
C2
C2
A1
A1
A1
S1
C1
C1
LSB
A0
A0
A0
S0
C0
C0
Function
Volume Control
Speaker ATT L
Speaker ATT R
Audio Switch
Bass Control
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 ]
