STM32H533CE datasheet(53/231 Pages) STMICROELECTRONICS

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DS14539 Rev 1

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STM32H533xx

Functional overview

3.37.1

Universal synchronous/asynchronous receiver transmitter

(USART/UART)

The USART offers a flexible means to perform full-duplex data exchange with external

equipments requiring an industry standard NRZ asynchronous serial data format. A very

wide range of baud rates can be achieved through a fractional baud rate generator.

The USART supports both synchronous one-way and half-duplex single-wire

communications, as well as LIN (local interconnection network), Smartcard protocol, IrDA

(infrared data association) SIR ENDEC specifications, and modem operations (CTS/RTS).

Multiprocessor communications are also supported.

High-speed data communications up to 20 Mbauds are possible by using the DMA (direct

memory access) for multibuffer configuration.

The USART main features are:

•

Full-duplex asynchronous communication

•

NRZ standard format (mark/space)

•

Configurable oversampling method by 16 or by 8, to achieve the best compromise

between speed and clock tolerance

•

Baud rate generator systems

•

Two internal FIFOs for transmit and receive data

Each FIFO can be enabled/disabled by software and come with a status flag.

•

A common programmable transmit and receive baud rate

•

Dual-clock domain with dedicated kernel clock for peripherals independent from PCLK

Multiprocessor communication

Synchronous mode (master/slave)

Smartcard mode

Single-wire half-duplex communication

IrDA SIR ENDEC block

LIN mode

Dual-clock domain and wake-up from Stop mode

X(2)

Receiver timeout interrupt

Modbus communication

Auto-baud rate detection

Driver enable

USART data length

7, 8, and 9 bits

Tx/Rx FIFO

Tx/Rx FIFO size

8 bytes

1. X = supported.

2. Wake-up supported from Stop mode.

Table 10. USART, UART and LPUART features (continued)

Mode/feature(1)

USART

1/2/3/6

UART

4/5

LPUART

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