STM32F303XD datasheet(30/173 Pages) STMICROELECTRONICS

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Functional overview

STM32F303xD STM32F303xE

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

served by the DMA controller.

3.22

Universal asynchronous receiver transmitter (UART)

The STM32F303xD/E 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.

3.23

Serial peripheral interface (SPI)/Inter-integrated sound

interfaces (I2S)

Up to four SPIs are able to communicate up to 18 Mbit/s in slave and master modes in full-

duplex and half-duplex communication 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) supporting four different audio

standards can operate as master or slave at half-duplex and full duplex communication

modes. They can be configured to transfer 16 and 24 or 32 bits with 16-bit or 32-bit data

resolution and synchronized by a specific signal. Audio sampling frequency from 8 kHz up to

192 kHz can be set by 8-bit programmable linear prescaler. When operating in master mode

it can output a clock for an external audio component at 256 times the sampling frequency.

Refer to Table 9 for the features available in SPI1, SPI2, SPI3 and SPI4.

Table 8. USART features

USART modes/features(1)

USART1

USART2

USART3

UART4

UART5

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

XXX

Dual clock domain and wakeup from Stop mode

Receiver timeout interrupt

XXX

Modbus communication

Auto baud rate detection

Driver Enable

1. X = supported.

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