PICAXE-20M2 Architecture

Author: Jeff + Claude AI

Genre: Electronics

Category: Microprocessor

Date: 26th May 2026

Description: Step inside the silicon and discover what makes one of the hobbyist world's most beloved microcontrollers tick. This comprehensive guide walks readers through every layer of the PICAXE-20M2, from its origins and design philosophy to its processor core, memory architecture, clocking, and power management. Detailed chapters explore digital and analog I/O, onboard sensors, communication protocols, and the programming environment that brings it all together. Whether you're an educator, maker, or engineer, this deep dive offers a clear and thorough understanding of the chip's inner workings and practical deployment.

Summary

Ch1. Origins and Design Philosophy

Ch2. Pin Configuration and Physical Layout

Ch3. The Core - Processor and Memory Architecture

Ch4. Clock Systems and Power Management

Ch5. Digital Input/Output Subsystems

Ch6. Analog Capabilities and Internal Sensors

Ch7. Communication Interfaces and Protocols

Ch8. Programming Environment and Practical Deployment