36.4.1.4 Client Operation in 10-Bit Addressing Modes
In 10-bit Addressing modes, the first two bytes following a Start condition form the
10-bit address (see Figure 36-20). The first byte (address high byte) holds the upper two address
bits, the R/W bit, and a five digit code
(11110) as defined by the I2C Specification. The second
byte (address low byte) holds the lower eight address bits. In all 10-bit Addressing
modes, the R/W value contained in the first byte must always be
zero (R/W = 0). If the host intends to read
data from the client, it must issue a Restart condition, followed by the address high
byte with R/W set (R/W =
1).
The first byte is compared to the values in the I2CxADR1 and
I2CxADR3
registers in 10-bit Addressing mode, or to the masked value of I2CxADR1 in 10-bit
Addressing with Masking mode. The second byte is compared to the values in the I2CxADR0 and
I2CxADR2
registers in 10-bit Addressing mode, or to the masked value of I2CxADR0 in 10-bit
Addressing with Masking mode. If an address high byte match occurs, the high address
byte is copied to I2CxADB1 and the R/W bit value is copied to the
Read Information (R) bit, and if an address low byte match occurs, the low address byte is
copied to I2CxADB0.
