Microcontroller BootUp Sequence: From Power-On Reset to main().

In this video, we deep dive into what actually happens inside an STM32 microcontroller before main() executes.

When a microcontroller powers on or resets (power reset, watchdog reset, soft reset), the hardware performs critical operations automatically. Understanding these steps is essential for bare-metal embedded programming and debugging startup issues.

🔍 Topics covered in this video:
• What happens immediately after power-on or reset
• How MSP (Main Stack Pointer) is loaded from address 0x00000000
• How PC (Program Counter) is loaded from address 0x00000004
• Memory aliasing in STM32 (Flash mapped to 0x00000000)
• Why the stack starts at the end of RAM
• Interrupt Vector Table (IVT) basics
• Role of Reset Handler
• How hardware transfers control before software execution
• Why linker script is critical during boot

This video clearly explains which parts are handled by hardware and which parts are the developer’s responsibility, setting the foundation for understanding startup files and linker scripts.

📌 In upcoming videos, we will:
• Deep dive into the startup file
• Explain linker script syntax line-by-line
• Show how stack, heap, and sections are placed in memory

👨‍💻 Who this video is for:
• Embedded software engineers
• STM32 developers
• Bare-metal programmers
• AUTOSAR engineers wanting low-level clarity
• Students preparing for embedded interviews

📺 Part of the playlist: https://youtube.com/playlist?list=PL5Zle-_zaQjB3G7PijwOq1AbH01tWf4w3&si=IjjAZOumPKqQ5T-j

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Видео Microcontroller BootUp Sequence: From Power-On Reset to main(). канала BitFlip Academy