STM32F030x4 datasheet(22/88 Pages) STMICROELECTRONICS

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Functional overview

STM32F030x4 STM32F030x6 STM32F030x8

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DocID024849 Rev 1

3.14

Universal synchronous/asynchronous receiver transmitters

(USART)

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

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

They provide hardware management of the CTS and RTS signals, multiprocessor

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

communication mode. The USART1 supports also auto baud rate feature.

The USART interfaces can be served by the DMA controller.

Refer to Table 8 for the differences between USART1 and USART2.

3.15

Serial peripheral interface (SPI)

Up to two SPIs are able to communicate up to 18 Mbits/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.

Refer to Table 9 for the differences between SPI1 and SPI2.

3.16

Serial wire debug port (SW-DP)

An ARM SW-DP interface is provided to allow a serial wire debugging tool to be connected

to the MCU.

Table 8. STM32F030x USART implementation

USART modes/features(1)

1. X = supported.

USART1

USART2

Hardware flow control for modem

Continuous communication using DMA

Multiprocessor communication

Synchronous mode

Single-wire half-duplex communication

Receiver timeout interrupt

Auto baud rate detection

Table 9. STM32F030x SPI implementation

SPI features(1)

1. X = supported.

SPI1

SPI2

Hardware CRC calculation

Rx/Tx FIFO

NSS pulse mode

TI mode

STM32F030x4 Datasheet(PDF) 22 Page - STMicroelectronics

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