STM32F103C6T6A(without CH340). STM32F103C6T6A(with CH340). STM32F103C6T6A Specifications. STM32F103C8T6(without CH340). STM32F103C8T6(with CH340). STM32F103C8T6 Specifications. TYPE-C: power input, USB/serial port (CH340) one of the two options.
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