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ST STM32WL55JC User Manual

ST STM32WL55JC
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Page #1076 background image
Inter-integrated circuit (I2C) interface RM0453
1076/1454 RM0453 Rev 2
Figure 292. Transfer sequence flowchart for I2C master transmitter for N≤255 bytes
MS19860V2
Master initialization
Master
transmission
Write I2C_TXDR
I2C_ISR.TXIS
=1?
No
Yes
I2C_ISR.NACKF =
1?
Yes
No
NBYTES = N
AUTOEND = 0 for RESTART; 1 for STOP
Configure slave address
Set I2C_CR2.START
End
NBYTES
transmitted?
I2C_ISR.TC =
1?
Yes
End
No
Yes
No
Set I2C_CR2.START with
slave addess NBYTES ...

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ST STM32WL55JC Specifications

General IconGeneral
SeriesSTM32WL
Speed48MHz
Flash Memory256 KB
RAM64 KB
Voltage - Supply (Vcc/Vdd)1.8 V ~ 3.6 V
RF Frequency150MHz ~ 960MHz
Data ConvertersA/D 12x12b; D/A 1x12b
ADC Channels12
DAC Channels1
Sub-GHz RadioYes
Core ProcessorARM Cortex-M4
ConnectivityI2C, SPI, UART
Oscillator TypeInternal
Operating Temperature-40°C ~ 85°C
Communication InterfacesI2C, SPI, USART
Wireless ConnectivityLoRa, Sigfox
Radio Frequency Range150MHz ~ 960MHz
PeripheralsDMA, POR, PWM, WDT

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