SLLA662 March   2025 MCF8315A , MCF8315C , MCF8315C-Q1 , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D , MCF8329A , MCT8315A , MCT8316A , MCT8329A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2I2C Related Details for MCx83xx Family
    1. 2.1 TARGET_ID
    2. 2.2 CRC_EN
      1. 2.2.1 CRC Computational Details
    3. 2.3 MEM_SEC, MEM_PAGE, and MEM_ADDR
  6. 3I2C Secondary Device Feature Supported by MCx83xx Family
    1. 3.1 Clock Stretching
  7. 4Primary Device Read and Write Expected Flow
    1. 4.1 Read Sequence
    2. 4.2 Write Sequence
  8. 5Summary
  9. 6References

3.1 Clock Stretching

Clock stretching in I2C protocol allows a secondary device to pull down SCL line to slow down communication from the primary device to manage data, store received data, or prepare to transmit another byte of data.

Note: Except for MCF8316A and MCT8316A, all the devices support clock stretching. The clock low timeout is configured as 4.66ms in the devices which support clock stretching.