Hi, I tried to solve the questions that occurred during the development of STM32 G0 Series through Googling, but I couldn't find anything related, so I'm leaving a post.
This is talk about I2C Analog Filter's Delay Time.
According to Reference Manual (RM0444), I2C peripheral support a analog filter on SDA & SCL both line, which can remove noise signal over 20MHz( -> 50nsec width pulse).
It also says that enabling this Filter can result in a response delay of up to 260 nsec.
I guessed this filter as LPF.
When you think of a LPF, the time delay is determined by the time constant value of the filter, which will be constatnt until the time constant value changes.
So I wondered if it could occur as the response delay value changed.
Q1. Does anyone know about the structure of that I2C Analog Filter?
Q2. Does anyone know about why they described it as "up to" when it comes to analog filter response delay?
Thanks for all response.
