MS6865
MOSA
3 Stereo inputs / 2W PA output with Volume Control
I2C CONTROL INTERFACE
Data are transmitted to and from the MCU and MS6865 via the SDA and SCL. The SDA and SCL make up the
BUS interface. It should be noted that pullꢀup resistors must be connected to the positive supply voltage.
VDD
Rp
Rp
Pull up resistors
SDA (Serial Data Line)
SCL (Serial Clock Line)
MCU
MS6865
I2C interface protocol
The format consists of the following:
•A START condition
•A chip address byte including the chip address. (7bits)
•The 8th bit of the byte must be “0”.(write=0, read=1)
•The chip must always acknowledge the end of each transmitted byte.
•A data sequence (Nꢀbytes + Acknowledge)
•A STOP condition
SDA
SCL
1ꢀ7
8
9
1ꢀ7
8
9
1ꢀ7
8
9
S
P
STOP
ADDRESS
ACK
DATA
ACK
DATA
ACK
R / W
START
CONDITION
CONDITION
I2C chip address
88H
1
0
0
0
1
0
0
0
7 bits address
W
REV 2
9/22
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MOSA [ MOSA ELECTRONICS ]
