Problem Configuring STM32H747BIT6 in I2C FAST MODE and FAST MODE PLUS

[Rushali]

Hey all,

I am facing problem in configuring my board in I2c protocol. When  i configured the same board in standard mode it is working fine. Rest of the settings for pins(pull-up) ,rise time and fall time are same in both the files. 

Also attaching waveforms for both the mode. Can anyone suggest me what can be done to make the board work in fast mode as well.

Thanking you in advance.

[TDK · Accepted solution]

The pullup resistors on the SDA/SCL lines are insufficient for fast mode. Replace them with lower valued resistors. 2.2 kOhm is typically fine.

[Rushali]

Dear  TDK,

Thanks for your suggestion. Will implement the changes within the circuit and let you know if it is working or not.

👍.

[Rushali]

Dear TDK,

Thank you so much for your suggestion i have implemented the changes in the hardware and is it working fine. Thank you for being kind and replying.