Writing data to a target device consists of three
parts, as illustrated in Figure 6-5:
- The controller begins with a start condition
followed by the target device address with the R/
W bit set to 0’b.
- After an ACK from the target device, the 8-bit
register word address is written.
- After an ACK from the target device, the 8-bit
data is written, followed by a stop
condition.