Usart Implementation; Usart Functional Description; Table 83. Stm32F05Xxx Usart Features - STMicroelectronics STM32F05 series Reference Manual

RM0091
25.4

USART implementation

This manual describes the full set of features implemented in USART1. USART2 supports a
smaller set of features, but is otherwise identical to USART1. The differences are listed in
the following table.
Table 83.
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
1. X = supported.
25.5

USART functional description

Any USART bidirectional communication requires a minimum of two pins: Receive Data In
(RX) and Transmit Data Out (TX):
RX: Receive Data Input is the serial data input. Oversampling techniques are used for data
recovery by discriminating between valid incoming data and noise.
TX: Transmit Data Output. When the transmitter is disabled, the output pin returns to its I/O
port configuration. When the transmitter is enabled and nothing is to be transmitted, the TX
pin is at high level. In single-wire and Smartcard modes, this I/O is used to transmit and
receive the data.
Universal synchronous asynchronous receiver transmitter (USART)
STM32F05xxx USART features
USART modes/features
Doc ID 018940 Rev 1
(1)
USART1 USART2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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