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TKey: A reasonably secure RISC-V computer in a USB stick
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this post was submitted on 26 Dec 2023
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https://developer.arm.com/documentation/dui0646/c/The-Cortex-M7-Instruction-Set/Instruction-set-summary
So is the Cortex M7. The entirety of the M0+, M4, and M7 microcontroller cores are very, very small ARMs.
Hmmm. Okay, so its an FPGA Risc-V then.
That's kind of sad, that means there's no hope that its as power-efficient as a proper ASIC core like ARM-M7.