ST STM32WL55JC User Manual

Universal synchronous/asynchronous receiver transmitter (USART/UART) RM0453
1124/1454 RM0453 Rev 2
Figure 306. Word length programming
MS33194V2
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8
Start
bit
Stop
bit
Next
Start
bit
Idle frame
9-bit word length (M = 01 ), 1 Stop bit
Possible
Parity
bit
Break frame
Data frame
Clock **
Start
bit
Stop
bit
Start
bit
Stop
bit
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7
Start
bit
Stop
bit
Next
Start
bit
Idle frame
8-bit word length (M = 00 ), 1 Stop bit
Possible
Parity
bit
Break frame
Data frame
Clock **
Start
bit
Stop
bit
Start
bit
Stop
bit
Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 Bit6
Start
bit
Stop
bit
Next
Start
bit
Idle frame
7-bit word length (M = 10 ), 1 Stop bit
Possible
Parity
bit
Break frame
Data frame
Clock
** LBCL bit controls last data clock pulse
**
Start
bit
Stop
bit
Start
bit
Stop
bit

ST STM32WL55JC Specifications

General

Series	STM32WL
Speed	48MHz
Flash Memory	256 KB
RAM	64 KB
Voltage - Supply (Vcc/Vdd)	1.8 V ~ 3.6 V
RF Frequency	150MHz ~ 960MHz
Data Converters	A/D 12x12b; D/A 1x12b
ADC Channels	12
DAC Channels	1
Sub-GHz Radio	Yes
Core Processor	ARM Cortex-M4
Connectivity	I2C, SPI, UART
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C
Communication Interfaces	I2C, SPI, USART
Wireless Connectivity	LoRa, Sigfox
Radio Frequency Range	150MHz ~ 960MHz
Peripherals	DMA, POR, PWM, WDT