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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4228 датащи(PDF) 34 Page - STMicroelectronics |
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AN4228 датащи(HTML) 34 Page - STMicroelectronics |
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34 / 90 page  Peripheral migration AN4228 34/90 DocID024110 Rev 5 3.15 USART interface The STM32F3 series embeds a new USART peripheral versus the STM32F1 series. The architecture, features and programming interface are modified to introduce new capabilities. As a consequence, the STM32F3 series USART programming procedures and registers are modified from those of the STM32F1 series, so any code written for the STM32F1 series using the USART needs to be updated to run on STM32F3 series. The STM32F3 series USART provides best-in-class added features: A choice of independent clock sources allowing – UART functionality and wake-up from low power modes, – convenient baud-rate programming independently of the APB clock reprogramming. SmartCard emulation capability: T=0 with auto retry and T=1 Swappable Tx/Rx pin configuration Binary data inversion Tx/Rx pin active level inversion Transmit/receive enable acknowledge flags New Interrupt sources with flags: – Address/character match – Block length detection and timeout detection Timeout feature Modbus communication Overrun flag disable DMA disable on reception error Wake-up from STOP mode Auto baud rate detection capability Driver Enable signal (DE) for RS485 mode For more information about STM32F3 USART features, please refer to USART chapter in the corresponding Reference Manual. |
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