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Logann123321
Logann123321
Associate II
October 30, 2019
Question

SPI clock only giving 400mv

  • October 30, 2019
  • 2 replies
  • 1179 views

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!0690X00000ArQd0QAF.jpg0690X00000ArQcvQAF.jpg

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2 replies

TDK
TDK
October 30, 2019

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

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Logann123321
Logann123321Author
Associate II
October 30, 2019

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

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