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STM32WBA50KG Datasheet(PDF) 46 Page - STMicroelectronics |
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STM32WBA50KG Datasheet(HTML) 46 Page - STMicroelectronics |
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46 / 110 page  Functional overview STM32WBA50KG 46/110 DS14688 Rev 1 3.27.1 USART/UART The U(S)ART 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 U(S)ART 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 direct memory access (DMA) for multibuffer configuration. The U(S)ART main features are: • Full-duplex asynchronous communication • NRZ standard format (mark/space) • Configurable oversampling method by 16 or 8 to achieve the best compromise between speed and clock tolerance • Baud rate generator systems • Two internal FIFOs for transmit and receive data, each of them can be enabled/disabled by software and come with a status flag • A common programmable transmit and receive baud rate Table 16. U(S)ART and LPUART features USART modes/features(1) USART1 LPUART1 Hardware flow control for modem X X Continuous communication using DMA X X Multiprocessor communication X X Synchronous mode (master/slave) X - Smartcard mode X - Single-wire half-duplex communication X X IrDA SIR ENDEC block X - LIN mode X - Dual-clock domain and wake-up from Stop modes X X Receiver timeout interrupt X - Modbus communication X - Auto-baud rate detection X - Driver enable X X USART data length 7, 8, and 9 bits Tx/Rx FIFO X X Tx/Rx FIFO size 8 bytes Autonomous mode X X 1. X = supported. |
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