Usart Main Features - ST STM32F101 series Reference Manual

Universal synchronous asynchronous receiver transmitter (USART)
27.2

USART main features

• Full duplex, asynchronous communications
•
NRZ standard format (Mark/Space)
• Fractional baud rate generator systems
–
• Programmable data word length (8 or 9 bits)
•
Configurable stop bits - support for 1 or 2 stop bits
•
LIN Master Synchronous Break send capability and LIN slave break detection
capability
–
•
Transmitter clock output for synchronous transmission
•
IrDA SIR Encoder Decoder
–
•
Smartcard Emulation Capability
–
–
•
Single wire half duplex communication
•
Configurable multibuffer communication using DMA (direct memory access)
–
•
Separate enable bits for Transmitter and Receiver
779/1128
A common programmable transmit and receive baud rates up to 4.5 MBits/s
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 ISO 7816-3 standards
0.5, 1.5 Stop Bits for Smartcard operation
Buffering of received/transmitted bytes in reserved SRAM using centralized DMA
DocID13902 Rev 15
RM0008