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STM32 Alternate Function Mapping (AFR Registers)

Updated 18 May 2026

Contents & prerequisites

Prerequisites

STM32 GPIO Registers: MODER, OTYPER, OSPEEDR, PUPDR, IDR, ODR

Unlocks

STM32 HAL Library: Init, DeInit, Poll, IT, DMA Functions

Article in preparation

STM32 Alternate Function Mapping (AFR Registers)

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Learning

PreviousSTM32 ADC: Oversampling, Injected, Regular, DMA Chain NextSTM32 Clock Tree: HSI, HSE, LSI, LSE, PLL Configuration

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