Figure 269. Master Initialization Flowchart; Figure 270. 10-Bit Address Read Access With Head10R=0 - ST STM32F423 Reference Manual

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master will re-launch automatically the slave address transmission until ACK is received. In
this case ADDRCF must be set if a NACK is received from the slave, in order to stop
sending the slave address.
If the FMPI2C is addressed as a slave (ADDR=1) while the START bit is set, the FMPI2C
switches to slave mode and the START bit is cleared when the ADDRCF bit is set.
Note: The same procedure is applied for a Repeated Start condition. In this case BUSY=1.
Initialization of a master receiver addressing a 10-bit address slave
•
If the slave address is in 10-bit format, the user can choose to send the complete read
sequence by clearing the HEAD10R bit in the FMPI2C_CR2 register. In this case the
master automatically sends the following complete sequence after the START bit is set:
(Re)Start + Slave address 10-bit header Write + Slave address 2nd byte + REStart +
Slave address 10-bit header Read
Fast-mode Plus Inter-integrated circuit (FMPI2C) interface

Figure 269. Master initialization flowchart

Figure 270. 10-bit address read access with HEAD10R=0

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