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As an amateur EE it is so annoying that they reuse names of already existing ARM chips.

ARM Cortex-M4 or simply M4 is quite popular ARM architecture. I am using M0, M3 and M4 chips from ST on a daily basis.

It's not like the practice of giving marketing names to chips is generally a world of logical sanity if you look at Intel i5/i7/i9 etc.

As a professional EE, I know that ARM Cortex-M4 is not a chip. It's an embedded processor that is put into an SOC (which is a chip), such as the STM32-family from ST.

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