STMicroelectronics STM32F05 series - Figure 215. Transfer Bus Diagrams for I2 C Master Transmitter

Inter-integrated circuit (I
2
C) interface RM0091
494/742 Doc ID 018940 Rev 1
Figure 215. Transfer bus diagrams for I2C master transmitter
MS19862V1
Example I2C master transmitter 2 bytes, automatic end mode (STOP)
Address
S
INIT: program Slave address, program NBYTES = 2, AUTOEND=1, set START
EV1: TXIS ISR: wr data1
EV2: TXIS ISR: wr data2
A
data1
A
TXISTXIS
data2
A
NBYTES
P
legend:
transmission
reception
SCL stretch
EV1 EV2
xx
2
INIT
Example I2C master transmitter 2 bytes, software end mode (RESTART)
Address
S
INIT: program Slave address, program NBYTES = 2, AUTOEND=0, set START
EV1: TXIS ISR: wr data1
EV2: TXIS ISR: wr data2
EV3: TC ISR: program Slave address, program NBYTES = N, set START
A
data1
A
TXIS TXIS
data2
A
NBYTES
ReS
legend:
transmiss
ion
reception
SCL stret
ch
EV1 EV2
2xx
INIT
TC
Address
TXE
TXE
EV3