Host Operation in 10-Bit Addressing Modes

In Host 10-bit Addressing modes, the client’s 10-bit address and R/W bit value are loaded into either the I2CxADB0 and I2CxADB1 registers (when ABD = 0), or I2CxTXB (when ABD = 1). When the host intends to read data from the client, it must first transmit the full 10-bit address with the R/W bit clear (R/W = 0), issue a Restart condition, then transmit the address high byte with the R/W bit set (R/W = 1). When the host intends to write data to the client, it must transmit the full 10-bit address with the R/W bit clear (R/W = 0).