ST STM32F301 6 Series Reference Manual page 679

RM0366
Example I2C
NBYTES
INIT: program
EV1: RXNE ISR: rd data1
EV2: RXNE ISR: rd data2
Example I2C
INIT
NBYTES
xx
INIT: program
EV1: RXNE ISR: rd data1
EV2: RXNE ISR: read data2
EV3: TC ISR: program
25.4.10 I2C_TIMINGR register configuration examples
The following tables provide examples of how to program the I2C_TIMINGR register to
obtain timings compliant with the I²C-bus specification. To get more accurate configuration
values, use the STM32CubeMX tool (I2C Configuration window).
Figure 268. Transfer bus diagrams for I2C controller receiver
controller receiver 2 bytes, automatic end mode (STOP)
S Address A data1
INIT
xx 2
target address, program NBYTES = 2, AUTOEND=1, set START
controller receiver 2 bytes, software end mode (RESTART)
RXNE
S Address A data1
A
2
target address, program NBYTES = 2, AUTOEND=0, set START
target address, program NBYTES = N, set START
(mandatory events only)
RXNE RXNE
data2 NA
A
EV1 EV2
RXNE TC
data2 NA ReS Address
EV1 EV2
N
RM0366 Rev 5
Inter-integrated circuit interface (I2C)
legend:
P
legend:
transmission
reception
SCL stretch
transmission
reception
SCL stretch
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