SPRUJ53B April 2024 – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
The 10-bit addressing format can be enabled by setting expanded address (I2CMDR.XA = 1) and disabling free data format (I2CMDR.FDF = 0).
The 10-bit addressing format (see Figure 26-11) is similar to the 7-bit addressing format, but the controller sends the target address in two separate byte transfers. The first byte consists of 11110b, the two MSBs of the 10-bit target address, and R/W. The second byte is the remaining 8 bits of the 10-bit target address. The target must send acknowledgment after each of the two byte transfers. Once the controller has written the second byte to the target, the controller can either write data or use a repeated START condition to change the data direction. For more details about using 10-bit addressing, see the NXP Semiconductors I2C bus specification.