Figure 284. Transfer Bus Diagrams For I2C Master Receiver - STMicroelectronics STM32WLEx Reference Manual

RM0461
Example I2C master receiver 2 bytes, automatic end mode (STOP)
NBYTES
INIT: program Slave address, program NBYTES = 2, AUTOEND=1, set START
EV1: RXNE ISR: rd data1
EV2: RXNE ISR: rd data2
Example I2C master receiver 2 bytes, software end mode (RESTART)
INIT
NBYTES
xx
INIT: program Slave address, program NBYTES = 2, AUTOEND=0, set START
EV1: RXNE ISR: rd data1
EV2: RXNE ISR: read data2
EV3: TC ISR: program Slave address, program NBYTES = N, set START

Figure 284. Transfer bus diagrams for I2C master receiver

S Address A data1
INIT
xx 2
RXNE
S Address A data1
A
EV1
2
Inter-integrated circuit (I2C) interface
RXNE RXNE
data2 NA P
A
EV1 EV2
RXNE TC
data2 NA ReS Address
EV2
N
RM0461 Rev 5
legend:
transmission
reception
SCL stretch
legend:
transmission
reception
SCL stretch
MS19865V1
979/1306
1014