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  4. USB to RS-232 converter with 5 Baud

USB to RS-232 converter with 5 Baud

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  • K Offline
    K Offline
    Kiran Satish
    wrote on last edited by
    #1

    Does anyone know a converter with this capability. I am looking for a USB to serial converter or chip (like FTDI, Prolific, Microchip) that is capable of doing 5 Baud. thanks

    PKNT

    L A S 3 Replies Last reply
    0
    • K Kiran Satish

      Does anyone know a converter with this capability. I am looking for a USB to serial converter or chip (like FTDI, Prolific, Microchip) that is capable of doing 5 Baud. thanks

      PKNT

      L Offline
      L Offline
      Lost User
      wrote on last edited by
      #2

      5 baud? Thats very slow. Do the standard USN to serial cables go this low?

      ============================== Nothing to say.

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      • K Kiran Satish

        Does anyone know a converter with this capability. I am looking for a USB to serial converter or chip (like FTDI, Prolific, Microchip) that is capable of doing 5 Baud. thanks

        PKNT

        A Offline
        A Offline
        Albert Holguin
        wrote on last edited by
        #3

        Why are you trying to go that slow? ...you can simply oversample a slow incoming signal btw (turn it into a high rate signal), but you have to make sure you have DC coupling wherever the slow signal is coming into, not sure if USB is AC or DC coupled. If it happens to be AC coupled, the slow DC rates are going to get filtered out by the coupling capacitor.

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        • K Kiran Satish

          Does anyone know a converter with this capability. I am looking for a USB to serial converter or chip (like FTDI, Prolific, Microchip) that is capable of doing 5 Baud. thanks

          PKNT

          S Offline
          S Offline
          Steve44
          wrote on last edited by
          #4

          Hi Kiran, I ran into the same problem some time back, a communication link had a 5-baud initialization sequence where communication parameters were negotiated. Unfortunately we did not find any UART that supported this reliably. So our solution was to use a GPIO pin combined with a UART, implement the 5-baud initialization by sampling the GPIO input and after the negotiation switched the GPIO to high-Z and enabled the UART, now with a supported, high baud rate. Hope this helps.

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