1 Reply Latest reply on May 1, 2018 6:21 PM by rzzh

    I2C speed setting of MBR.

    user_245806886

      Hello

       

      I use the device wwhich is CY8CMBR3116-LQXI.

      It can select I2C speed to 50、100、400 kHz on I2C speed setting.

      how range does I2C seting of host acceptable to frequency gap from slave setting?

        • 1. Re: I2C speed setting of MBR.
          rzzh

          Suzuki-san,

           

          Good morning.

          50kHz, 100kHz, 400kHz, all are standard speed of I2C clock. The spec can be found in I2C standard spec: https://www.nxp.com/docs/en/user-guide/UM10204.pdf .

          Hence, in my mind, I2C speed options of a host should be 50kHz, 100kHz, 400kHz either.

          Besides,

          if I2C slave clock is set as 50kHz, it can support 50kHz I2C_Clk from host;

          if I2C slave clock is set as 100kHz, it can support 50kHz, 100kHz I2C_Clk from host;

          if I2C slave clock is set as 400kHz, it can support 50kHz ,100kHz, 400kHz I2C_Clk from host.

          I hope that I understood your questions correctly and above information can help you out.

           

          Thanks,

          Ryan