STM32F301C6 datasheet(27/141 Pages) STMICROELECTRONICS

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DS9895 Rev 8

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STM32F301x6 STM32F301x8

Functional overview

3.18

Universal synchronous/asynchronous receiver transmitter

(USART)

The STM32F301x6/8 devices have three embedded universal synchronous receiver

transmitters (USART1, USART2 and USART3).

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

All USARTs support hardware management of the CTS and RTS signals, multiprocessor

communication mode, single-wire half-duplex communication mode and synchronous

mode.

USART1 supports SmartCard mode, IrDA SIR ENDEC, LIN Master capability and

autobaudrate detection.

All USART interfaces can be served by the DMA controller.

Refer to Table 8 for the features available in all USARTs interfaces.

3.19

Serial peripheral interfaces (SPI)/inter-integrated sound

interfaces (I2S)

Two SPI interfaces (SPI2 and SPI3) allow communication up to 18 Mbit/s in slave and

master modes in 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.

Two standard I2S interfaces (multiplexed with SPI2 and SPI3) are available, that can be

operated in master or slave mode. These interfaces can be configured to operate with 16/32

bit resolution, as input or output channels. Audio sampling frequencies from 8 kHz up to

192 kHz are supported. When either or both of the I2S interfaces is/are configured in master

Table 8. USART features

USART modes/features(1)

1. X = supported.

USART1

USART2

USART3

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

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