STMicroelectronics STM32F05 series - Figure 222. Transfer Sequence Flowchart for Smbus Slave Receiver N Bytes + PEC

RM0091 Inter-integrated circuit (I
2
C) interface
Doc ID 018940 Rev 1 509/742
Figure 222. Transfer sequence flowchart for SMBus slave receiver N Bytes + PEC
MS19868V1
Slave initialization
SMBus slave
reception
Read I2Cx_RXDR.RXDATA
I2Cx_ISR.RXNE =1?
I2Cx_ISR.TCR = 1?
No
Yes
I2Cx_ISR.ADDR =
1?
Yes
No
Read ADDCODE and DIR in I2Cx_ISR
I2Cx_CR2.NBYTES = 1, RELOAD =1
PECBYTE=1
Set I2Cx_ICR.ADDRCF
SCL
stretched
Read I2Cx_RXDR.RXDATA
Program I2Cx_CR2.NACK = 0
I2Cx_CR2.NBYTES = 1
N = N - 1
N = 1?
Read I2Cx_RXDR.RXDATA
Program RELOAD = 0
NACK = 0 and NBYTES = 1
I2Cx_ISR.RXNE
=1?
No
End
No
Yes
Yes