STM32F373VC datasheet(25/128 Pages) STMICROELECTRONICS

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STM32F37x

Functional overview

Doc ID 022691 Rev 3

25/128

3.20

Universal synchronous/asynchronous receiver transmitter

(USART)

The STM32F37x embeds three universal synchronous/asynchronous receiver transmitters

(USART1, USART2 and USART3).

All USARTs interfaces are able to communicate at speeds of up to 9 Mbit/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, Smart Card mode (ISO 7816 compliant), autobaudrate feature and

have LIN Master/Slave capability. The USART interfaces can be served by the DMA

controller.

Refer to Table 8 for the features of USART1, USART2 and USART3.

3.21

Serial peripheral interface (SPI)/Inter-integrated sound

interfaces (I2S)

Up to three SPIs are able to communicate at 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 is configurable to 8 bits or 16 bits. The hardware CRC

generation/verification supports basic SD Card/MMC modes.

The SPIs can be served by the DMA controller.

Three standard I2S interfaces (multiplexed with SPI1, 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

Table 8.

STM32F37x USART implementation

USART modes/features(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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