Questions tagged [f4]

Shorthand for the STM32F4xx series of microcontrollers from STMicroelectronics, commonly used on multirotor flight controllers boards. e.g. STM32F401, STM32F411

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What does it mean for SBUS to be an inverted protocol?

I've heard talk about how F4-based flight controllers can't natively support the SBUS receiver protocol without special circuitry. What does this mean and what hardware is needed to invert an inverted ...