Rise and Fall time specifications for SCL and SDA lines of I2C

Version 2

    Translation - Chinese: I2C的SCL和SDA线的上升和下降时间规范 - Community Translated (ZH)

     

    Question:
    What are the Rise and Fall time specifications for SCL and SDA lines of I2C communication in PSoC device?

     

    Response:
    The PSoC is fully compliant to the Philips I2C bus standard which may be downloaded from the below link. 

    http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf

    The following table shows the rise and fall time specifications for both SCL and SDA lines in both Full speed and Standard speed of operation.

     

                                                                                                               

      

         Parameter

     
      

         Standard mode(100KHz)

     
      

         Fast Mode(400KHz)

     
      

         Unit

     
      

         Min

     
      

         Max

     
      

         Min

     
      

         Max

     
      

         Rise Time(for both SCL and SDA)

     
      

         _

     
      

         1000

     
      

         20+0.1Cb*

     
      

         300

     
      

         ns

     
      

         Fall Time(for both SCL and SDA)

     
      

         _

     
      

         300

     
      

         20+0.1Cb*

     
      

         300

     
      

         ns

     

     

    *Cb -> Total capacitance of one bus line in pF.