STM32F051X4 datasheet(25/122 Pages) STMICROELECTRONICS

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STM32F051x4 STM32F051x6 STM32F051x8

Functional overview

3.17

Universal synchronous/asynchronous receiver/transmitter

(USART)

The device embeds up to two universal synchronous/asynchronous receivers/transmitters

(USART1, USART2) which communicate at speeds of up to 6 Mbit/s.

They provide hardware management of the CTS, RTS and RS485 DE signals,

multiprocessor communication mode, master synchronous communication and single-wire

half-duplex communication mode. USART1 supports also SmartCard communication (ISO

7816), IrDA SIR ENDEC, LIN Master/Slave capability and auto baud rate feature, and has a

clock domain independent of the CPU clock, allowing to wake up the MCU from Stop mode.

The USART interfaces can be served by the DMA controller.

SMBus

Wakeup from STOP

1. X = supported.

Table 9. STM32F051xx I2C implementation (continued)

I2C features(1)

I2C1

I2C2

Table 10. STM32F051xx USART implementation

USART modes/features(1)

1. X = supported.

USART1

USART2

Hardware flow control for modem

Continuous communication using DMA

Multiprocessor communication

Synchronous mode

Smartcard mode

Single-wire half-duplex communication

IrDA SIR ENDEC block

LIN mode

Dual clock domain and wakeup from Stop mode

Receiver timeout interrupt

Modbus communication

Auto baud rate detection

Driver Enable

STM32F051X4 Datasheet(PDF) 25 Page - STMicroelectronics