STM32F072RB Jitter/Delay

[MF.2]

Small delays occur in projects and tests. The delays are usually about 6us. They also occur with simple calculations. What can be the reason? I have already tested with a new project without functionalities.

[TDK]

Not much info here. Delays in what? Could be the mcu is tied up doing other things, such as a systick interrupt.

[MF.2]

The processing time varies, as can be seen in the images. I consciously do not do other things on the side. I use the HAL API to use UART, SPI or ADC and observe this behaviour again and again.

[TDK]

Is the SysTick interrupt running? That would be my guess. You can replace SysTick with a non-interrupt based timer with some effort.