Usart Main Features - ST STM32F410 Reference Manual

Universal synchronous receiver transmitter (USART) /universal asynchronous receiver transmit-
24.2

USART main features

• Full duplex, asynchronous communications
•
NRZ standard format (Mark/Space)
• Configurable oversampling method by 16 or by 8 to give flexibility between speed and
clock tolerance
•
Fractional baud rate generator systems
–
•
Programmable data word length (8 or 9 bits)
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Configurable stop bits - support for 1 or 2 stop bits
•
LIN Master Synchronous Break send capability and LIN slave break detection
capability
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Transmitter clock output for synchronous transmission
•
IrDA SIR encoder decoder
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•
Smartcard emulation capability
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–
•
Single-wire half-duplex communication
•
Configurable multibuffer communication using DMA (direct memory access)
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•
Separate enable bits for transmitter and receiver
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Transfer detection flags:
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–
–
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Parity control:
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–
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Four error detection flags:
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–
–
–
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Ten interrupt sources with flags:
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628/771
Common programmable transmit and receive baud rate (refer to the datasheets
for the value of the baud rate at the maximum APB frequency.
13-bit break generation and 10/11 bit break detection when USART is hardware
configured for LIN
Support for 3/16 bit duration for normal mode
The Smartcard interface supports the asynchronous protocol Smartcards as
defined in the ISO 7816-3 standards
0.5, 1.5 stop bits for Smartcard operation
Buffering of received/transmitted bytes in reserved SRAM using centralized DMA
Receive buffer full
Transmit buffer empty
End of transmission flags
Transmits parity bit
Checks parity of received data byte
Overrun error
Noise detection
Frame error
Parity error
CTS changes
LIN break detection
Transmit data register empty
Transmission complete
RM0401 Rev 3