STM32WB50CG datasheet(44/119 Pages) STMICROELECTRONICS

44 / 119 page

Functional overview

STM32WB50CG STM32WB30CE

44/119

DS13047 Rev 5

3.19

Universal synchronous/asynchronous receiver transmitter

(USART)

The devices embed one universal synchronous receiver transmitter.

This interface provides asynchronous communication, IrDA SIR ENDEC support,

multiprocessor communication mode, single-wire half-duplex communication mode and has

LIN Master/Slave capability. It provides hardware management of the CTS and RTS signals,

and RS485 driver enable.

The USART is able to communicate at speeds of up to 4 Mbit/s, and also provides Smart

Card mode (ISO 7816 compliant) and SPI-like communication capability.

The USART supports synchronous operation (SPI mode), and can be used as an SPI

master.

The USART has a clock domain independent from the CPU clock, allowing it to wake up the

MCU from Stop mode using baudrates up to 200 kbaud. The wake up events from Stop

mode are programmable and can be:



the start bit detection



any received data frame



a specific programmed data frame.

The USART interface can be served by the DMA controller.

3.20

Serial peripheral interface (SPI1)

The SPI interface enables communication up to 32 Mbit/s in master and up to 24 Mbit/s in

slave modes, in half-duplex, full-duplex and simplex modes. The 3-bit prescaler gives 8

master mode frequencies and the frame size is configurable from 4 bits to 16 bits. The SPI

interface supports NSS pulse mode, TI mode and Hardware CRC calculation.

The SPI interface can be served by the DMA controller.

3.21

Development support

3.21.1

Serial wire JTAG debug port (SWJ-DP)

The Arm® SWJ-DP interface is embedded, and is a combined JTAG and serial wire debug

port that enables either a serial wire debug or a JTAG probe to be connected to the target.

Independent clock

Wakeup from Stop 0 / Stop 1 mode on address match

Wakeup from Stop 2 mode on address match

1. X: supported.

Table 12. I2C implementation (continued)

I2C features(1)

I2C1

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