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LC01700PW 데이터시트(PDF) 7 Page - Sanyo Semicon Device |
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LC01700PW 데이터시트(HTML) 7 Page - Sanyo Semicon Device |
7 / 18 page LC01700PW No.A1337-7/18 3. Data transmission The length of each byte output to the SDA line is always 8 bits. An acknowledge bit is always necessary after each byte, Data is transmitted sequentially from the most significant bit (MSB). During data transfer, the slave address is transmitted after the "Start" condition (S). Data transfer is always ended by the "Stop" condition (P) generated by the master. 4. Acknowledge (Confirmation of reception) When the master generates the acknowledge clock pulse, the transmitter opens the SDA line (SDA line entering the "H" state). When the acknowledge clock pulse is in the "H" state, the receiver sets the SDA line to "L" each time it receives one byte (eight bits) of data. When the master functions as receiver, the master informs the end of data to the slave by omitting acknowledgement at the end of data sent from the slave. START condition clock pulse for ACK ACK ; acknowledgement NACK ; not acknowledgement Dataoutput by Transmitter Release the SDA line(HIGH) NACK(master is reciever) ACK(master is transmitter) Dataoutput by Receiver SCL from Master S 9 8 2 1 SDA SCL D7 Most- significant bit of MSB byte complete, interrupt within slave clock line held low while interrupts are serviced D6 D1 D0 ACK signal from slsave clock pulse for ACK clock pulse for ACK START or repeated START condition STOP or repeated START condition ACK signal from receiver S or Sr Sr or P Sr 9 2 3-8 1 89 7 2 1 P ACK ; acknowledgement |
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