GPIO output is running slower than clock frequency

[SHong.5]

Hi

I'm trying out stm32h743 now, and try to make output signal from GPIO.

I've set same frequency on F429 & H743 with same code. However, The the signal much slower(longer) in H743.

• F429 400ns
• H743 4000ns

(well... my purpose is to shorten the length of the signal as much as possible)

Even if I maximized frequency of H743, the signal of H743 is still much slower(3200ns) than F429.

 

Could anybody help me to figure out the reason?

Thanks in advance.

[KnarfB · Accepted solution]

There were recent discussions on H7 GPIO speed, e.g. https://community.st.com/s/question/0D73W0000004bT4/detail

[SHong.5]

Thanks a lot! KnarfB

I'll refer to the link above.