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MS6266SSGU Datasheet(PDF) 7 Page - MOSA ELECTRONICS |
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MS6266SSGU Datasheet(HTML) 7 Page - MOSA ELECTRONICS |
7 / 11 page MOSA MS6266 6-Channel Electronic Volume Controller REV1 7 www.mosanalog.com.tw BUS INTERFACE Data are transmitted to and from the MCU to the MS6266 via the SDA and SCL. The SDA and SCL make up the BUS interface. It should be noted that pull-up resistors must be connected to the positive supply voltage. SDA (Serial Data Line) Rp Rp SCL (Serial Clock Line) Pull up resistors V DD MCU MS6266 Interface protocol The format consists of the following ‧A START condition ‧A chip address byte including the MS6266 address. (7bits) ‧The 8 th bit of the byte must be “0”.(write=0, read=1) ‧MS6266 must always acknowledge the end of each transmitted byte. ‧A data sequence (N-bytes + Acknowledge) ‧A STOP condition SCL SDA 1-7 8 9 1-7 8 9 9 8 1-7 S P ADDRESS R/ W -- ACK ACK ACK DATA DATA START CONDITION STOP CONDITION Address code The MS6266 has four address codes, they were selected by AC1(pin17)and AC2(pin4). AC1 AC2 Address code 0 0 80H 0 1 84H 1 0 88H 1 1 8CH AC1=1, AC2=0 1000 00 10 7 bits address MS6266 address W 0: connected to GND, 1: connected to VDD |
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