ST STM32G471

Inter-integrated circuit (I2C) interface RM0440
1890/2126 RM0440 Rev 4
Figure 650. Transfer sequence flowchart for I2C master receiver for N >255 bytes
MS19864V2
Master initialization
Master reception
Read I2C_RXDR
I2C_ISR.RXNE
=1?
No
Yes
NBYTES = 0xFF; N=N-255
RELOAD =1
Configure slave address
Set I2C_CR2.START
NBYTES
received?
I2C_ISR.TC =
1?
Yes
End
No
Yes
No
Set I2C_CR2.START with
slave addess NBYTES ...
I2C_ISR.TCR
= 1?
Yes
IF N< 256
NBYTES =N; N=0;RELOAD=0
AUTOEND=0 for RESTART; 1 for STOP
ELSE
NBYTES =0xFF;N=N-255
RELOAD=1
No