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STM32F303xB STM32F303xC Functional overview

3.20 Universal synchronous/asynchronous receiver transmitter

(USART)

The STM32F303xB/STM32F303xC devices have three embedded universal

synchronous/asynchronous receiver transmitters (USART1, USART2 and USART3).

The USART interfaces are able to communicate at speeds of up to 9 Mbits/s.

They provide hardware management of the CTS and RTS signals, they support IrDA SIR

ENDEC, the multiprocessor communication mode, the single-wire half-duplex

communication mode and have LIN Master/Slave capability. The USART interfaces can be

served by the DMA controller.

3.21 Universal asynchronous receiver transmitter (UART)

The STM32F303xB/STM32F303xC devices have 2 embedded universal asynchronous

receiver transmitters (UART4, and UART5). The UART interfaces support IrDA SIR

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

mode. The UART4 interface can be served by the DMA controller.

Refer to Table 8 for the features available in all U(S)ART interfaces.

SMBus X X

Wakeup from STOP X X

1. X = supported.

Table 7. STM32F303xB/STM32F303xC I

C implementation (continued)

I2C features

(1)

I2C1 I2C2

Table 8. USART features

USART modes/features

(1)

USART1 USART2 USART3 UART4 UART5

Hardware flow control for modem X X X - -

Continuous communication using DMA X X X X -

Multiprocessor communication X X X X X

Synchronous mode X X X - -

Smartcard mode X X X - -

Single-wire half-duplex communication X X X X X

IrDA SIR ENDEC block X X X X X

LIN mode XXXXX

Dual clock domain and wakeup from Stop mode X X X X X

Receiver timeout interrupt XXXXX

Modbus communication X X X X X

Auto baud rate detection X X X - -

Driver Enable X X X - -

1. X = supported.

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