HSI

A Single Idea Ruined a Design in STM32 Development: The Dilemma of Ignoring USB Clock Requirements

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A Single Idea Ruined a Design in STM32 Development: The Dilemma of Ignoring USB Clock Requirements

Introduction Recently, I have been researching mechanical fault diagnosis and decided to create a small accelerometer, planning to use the STM32F1 as the main controller. Initially, I planned to use an external crystal oscillator as the main clock for the STM32, but to further reduce the size of the board, I decided to remove the … Read more

Comprehensive Overview of ARM Cortex-M Clocks

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Comprehensive Overview of ARM Cortex-M Clocks

Master the STM32 clock tree in one article – taking F401 as an exampleCW32L010-M0+ clock tree overview✅ HSE / LSE (external crystal oscillator) → high precision, but higher power consumption, requires startup time✅ HSI / LSI (internal RC oscillator) → fast startup, low power consumption, but poor precisionWhat is the RTC peripheral used for? It … Read more