easy5 pts · first answer countsmicrocontrollersclocksgpio

Peripheral registers ignore writes

On an STM32, you write to GPIOB mode registers but the pins do not change, and reading back gives 0. What is the most likely cause?

A.The pins need a pull-down firstB.GPIOB registers can only be written in an ISRC.The CPU is in little-endian modeD.The GPIOB clock was not enabled in the RCC

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Peripheral registers ignore writes

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