Ahsanu Posted December 31, 2021 Report Posted December 31, 2021 hey, iam new in this forum and midibox, i try learn build stm32 midibox core by making schematic from zero, cause its my first time using stm32 uC i little bit confuse about i/o input voltage level, in midibox core, for example PC13 can connect to 5v and 3.3v using j19, but i look in datasheet, say that pin (pc13) is not 5v tolerant. so is connecting 5v to not 5v tolerant is safe? i am using stm32f103rb chip, and here i attach schematic and datasheet screenshot thanks for attention, sorry my bad english Quote
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