1 Reply Latest reply on Oct 20, 2019 9:44 PM by WinstonF_61

    Connect CYW920819EVB-02 Evaluation Kit to SIM5360A

    WyLa_4527361

      Hi I am trying to see if I could connect CYW920819EVB-02 Evaluation Kit to the sim5360 which is a SIM card module.

      https://simcom.ee/modules/wcdma-hspa/sim5360/  

       

      I see they both accept Uart but the voltage is higher on the SIM module than the CYW920819EVB-02 Evaluation Kit. Would the transistor on the PUART let me step the voltage up? Also, would I be able to send and receive data between the two?

       

      Thanks

      Wyatt

        • 1. Re: Connect CYW920819EVB-02 Evaluation Kit to SIM5360A
          WinstonF_61

          Hi Wyatt,

           

          A level translator would be the best choice for your design. Using a Transistor should also work, but it depends on the baud rate you are using. For slower baud rates (eg. 9600) a transistor could work.

           

          To keep the circuit to a minimum, you could connect the SIM module Tx line through a resistor voltage divider to the Rx of the CYW920829EVAL-02.

           

          The SIM module Rx you will need a transistor to raise the voltage. I suggest you monitor this line on a scope to ensure the slew rate is sufficient for the Baud rate in use.

           

          Winston.

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