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BQ24297 Datasheet(PDF) 31 Page - Texas Instruments |
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BQ24297 Datasheet(HTML) 31 Page - Texas Instruments |
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31 / 55 page  1 7 Slave Address S 1 1 ACK 8 Reg Addr ACK 1 ACK 1 1 P 7 0 1 Data NCK 8 Slave Address 1 1 1 S 1 7 Slave Address S 1 1 ACK 8 Reg Addr ACK 1 Data Addr ACK 1 1 P 8 0 START SCL SDA S 1-7 8 9 ACK 1-7 8 9 ACK 1-7 8 9 STOP P ADDRESS R/W DATA ACK DATA SCL SDA START or Repeated START S or Sr 1 2 7 8 9 MSB ACK Acknowledgement signal from slave 1 2 8 9 ACK Acknowledgement signal from receiver STOP or Repeated START P or Sr bq24296, bq24297 www.ti.com SLUSBP6B – SEPTEMBER 2013 – REVISED NOVEMBER 2014 Programming (continued) Figure 23. Data Transfer on the I2C Bus 9.5.1.4 Acknowledge (ACK) and Not Acknowledge (NACK) The acknowledge takes place after every byte. The acknowledge bit allows the receiver to signal the transmitter that the byte was successfully received and another byte may be sent. All clock pulses, including the acknowledge 9th clock pulse, are generated by the master. The transmitter releases the SDA line during the acknowledge clock pulse so the receiver can pull the SDA line LOW and it remains stable LOW during the HIGH period of this clock pulse. When SDA remains HIGH during the 9th clock pulse, this is the Not Acknowledge signal. The master can then generate either a STOP to abort the transfer or a repeated START to start a new transfer. 9.5.1.5 Slave Address and Data Direction Bit After the START, a slave address is sent. This address is 7 bits long followed by the eighth bit as a data direction bit (bit R/W). A zero indicates a transmission (WRITE) and a one indicates a request for data (READ). Figure 24. Complete Data Transfer 9.5.1.5.1 Single Read and Write Figure 25. Single Write Figure 26. Single Read If the register address is not defined, the charger IC send back NACK and go back to the idle state. Copyright © 2013–2014, Texas Instruments Incorporated Submit Documentation Feedback 31 Product Folder Links: bq24296 bq24297 |
Similar Part No. - BQ24297_15 |
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Similar Description - BQ24297_15 |
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