37.4.1.3 Client Operation in 7-Bit Addressing Modes
The upper seven bits of an address byte are used to determine a client’s address, while the LSb
of the address byte is reserved as the Read/not Write (R/W)
bit. When R/W is set (R/W =
1
), the host device intends to read data from the client. When
R/W is clear (R/W =
0
), the host device intends to write data to the client. When an
address match occurs, the R/W bit is copied to the Read
Information (R) bit, and the 7-bit address is copied to I2CxADB0.