STM32F302xx/STM32F303xx
Functional overview
3.19
Universal synchronous/asynchronous receiver transmitter
(USART)
The STM32F302xx/STM32F303xx devices have three embedded universal
synchronous/asynchronous receiver transmitters (USART1, USART2 and USART3).
The USART interfaces are able to communicate at speeds of up to 9 Mbits/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 and have LIN Master/Slave capability. The USART interfaces can be
served by the DMA controller.
3.20
Universal asynchronous receiver transmitter (UART)
The STM32F302xx/STM32F303xx 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
UART interfaces can be served by the DMA controller.
Refer to Table 6 for the features available in all U(S)ARTs interfaces
Table 6.
USART features
USART modes/features(1)
USART1
USART2
USART3
UART4
UART5
Hardware flow control for modem
Continuous communication using DMA
Multiprocessor communication
Synchronous mode
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Smartcard mode
Single-wire half-duplex communication
IrDA SIR ENDEC block
X
X
X
X
X
X
X
X
X
X
X
X
LIN mode
Dual clock domain and wakeup from Stop mode
Receiver timeout interrupt
Modbus communication
Auto baud rate detection
Driver Enable
1. X = supported.
Doc ID 023353 Rev 5
27/133
STMICROELECTRONICS [ ST ]
