Summary

This article explains how ARM Cortex-M processors handle interrupts and, more generally, exceptions, covering the architectural model, NVIC, vector table, and the entry/exit sequence. Readers will learn how stacking, context save/restore, and fault mechanisms affect firmware behavior and interrupt latency.

Key Takeaways

• Explain the Cortex-M exception model, including types of exceptions and the entry/exit sequence
• Describe the vector table layout and how to configure and relocate it for firmware
• Illustrate automatic stacking/unstacking and the processor stack frame saved on exception entry
• Identify common fault handlers (HardFault, MemManage, BusFault, UsageFault) and strategies for debugging them

Who Should Read This

Embedded firmware engineers and MCU developers with basic microcontroller knowledge who want a clear, practical understanding of Cortex-M interrupt and exception mechanics to write robust firmware.

TimelessIntermediate

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