RS485 using USART or UART port on STM32












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.






stm32 uart rs485 3.3v







share|improve this question









$endgroup$

















    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.






    stm32 uart rs485 3.3v







    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.






      stm32 uart rs485 3.3v







      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




      stm32 uart rs485 3.3v






      share|improve this question













      share|improve this question











      share|improve this question




      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
            58 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
            58 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
            58 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
            58 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
            58 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
          58 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
          58 mins ago




















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