RS485 using USART or UART port on STM32












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On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?



I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.










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    2












    $begingroup$


    On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?



    I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.










    share|improve this question









    $endgroup$















      2












      2








      2





      $begingroup$


      On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?



      I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.










      share|improve this question









      $endgroup$




      On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?



      I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.







      stm32 uart rs485 3.3v






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      share|improve this question










      asked 1 hour ago









      scico111scico111

      352111




      352111






















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          $begingroup$

          It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.






          share|improve this answer









          $endgroup$









          • 1




            $begingroup$
            If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
            $endgroup$
            – Toor
            47 mins ago













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          $begingroup$

          It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.






          share|improve this answer









          $endgroup$









          • 1




            $begingroup$
            If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
            $endgroup$
            – Toor
            47 mins ago


















          4












          $begingroup$

          It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.






          share|improve this answer









          $endgroup$









          • 1




            $begingroup$
            If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
            $endgroup$
            – Toor
            47 mins ago
















          4












          4








          4





          $begingroup$

          It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.






          share|improve this answer









          $endgroup$



          It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 1 hour ago









          Tom L.Tom L.

          6,65011227




          6,65011227








          • 1




            $begingroup$
            If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
            $endgroup$
            – Toor
            47 mins ago
















          • 1




            $begingroup$
            If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
            $endgroup$
            – Toor
            47 mins ago










          1




          1




          $begingroup$
          If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
          $endgroup$
          – Toor
          47 mins ago






          $begingroup$
          If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
          $endgroup$
          – Toor
          47 mins ago




















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