The requires the following:

• A start condition
• A valid I²C address
• A register address byte
• A data byte for a single update

After the receipt of each byte, the device acknowledges by pulling the SDA line low during the high period of a single clock pulse. A valid I²C address selects the device. The device performs an update on the falling edge of the acknowledge signal that follows the LSB byte.

Figure 8-7 “Write” Data Transfer Format in Standard-, Fast, and Fast-Plus Modes

Figure 8-8 “Read” Data Transfer Format in Standard-, Fast, and Fast-Plus Modes