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I have checked What SPI frequencies does Raspberry Pi support? question, anyway its subject is RPi, not RPi Compute module.

Also, I want to check for usable frequency, not theoretical. Limitations on 'normal' RPi are probably due to design and despite 125MHz claimed theoretical speed, only 32MHz speed is achievable in practice.

This place https://elinux.org/index.php?title=RPi_SPI#Speed_2 brings the info about max speed of 32MHz

Additionaly,I would also be happy if anybody could mention about any other SBC's with usable SPI frequency speed above 32MHz.

smajli
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    I believe that using high frequencies would need careful wiring and design. Given that you haven't mentioned this factor I suspect you won't be able to achieve high frequencies. – joan Jan 10 '19 at 16:35
  • Could you add some context of why you need SPI with clocks above 32MHz? I suspect you're trying to do something that will not go well. There's a reason why high-speed standards like USB are not using SPI internally. – Dmitry Grigoryev Jan 11 '19 at 14:25

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