Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

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

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

DineshbabuM_66
Employee
First like received
Employee

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

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

Translation - Japanese: I2C の SCL と SDA 信号の立ち上り(Rise)時間と立ち下り(Fall)時間の仕様 - ... - Cypress Developer Community

 

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.

0 Likes