SPI clock only giving 400mv

[Logann123321]

Hi I am trying spi master on the stm32h7 nucleo board, when I am measuring the spi clock it looks like it is only giving me 400mV max, can someone explain to me why and how to solve it?

Thanks!

[TDK]

A 12MHz signal should look better than that. What pin? Might be tied to something else onboard. What’s the bandwidth of your scope?

[Logann123321]

HI,

sorry turns out I had a wrong setting, now it is telling me 3.8 v

But the wave form still looks the same, is it supposed to be like that or should it be mroe like a square wave?

Thanks