STM32F103
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The STM32F103 processor is used on the Blue Pill STM32 Development Board.
Fakes and Clones
There are a number of "clones" of the STM32F103 available. Most of those are likely properly licensed Cortex-M3 cores with peripherals designed to match the original STM32 and most can be used as drop-in replacements with some "quirks".
Unfortunately there are also quite a lot of fake chips available:
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| Fake STM32F103 (possibly a HK32) from some random Blue Pill | Real STM32F103 from my own Green Pill board |
These are chips labelled STM32F103xxx but they are not.
PIN Count
Extra Flash
The STM32F103C8 is supposed to have 64 kB of Flash memory.
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