# MFRC522 RFID Reader ## Introduction to MFRC522 RFID Reader The MFRC522 RFID reader is one of the most popular and widely used RFID modules in the world of electronics and IoT projects. As an enthusiast who has worked extensively with various RFID technologies, I can confidently say that the MFRC522 offers an exceptional balance of affordability, functionality, and ease of use. My personal journey with RFID began when I needed to create a secure access system for my home workshop, and the MFRC522 proved to be the perfect solution. ## Technical Specifications and Parameters When selecting an RFID reader, understanding its technical capabilities is crucial. Here are the detailed technical specifications for the MFRC522 RFID reader module: **Operating Parameters:** - **Operating Frequency:** 13.56 MHz - **Supported Protocols:** ISO/IEC 14443 A/MIFARE, ISO/IEC 14443 B (only in parts) - **RF Interface:** ISO 14443 compliant reader/writer - **Operating Voltage:** 2.5V to 3.3V - **Current Consumption:** 13-26mA (operating), 10μA (sleep mode) - **Communication Interfaces:** SPI (up to 10Mbps), I2C (up to 400kHz in fast mode, 3400kHz in high-speed mode), UART (up to 1228.8kbaud) **Physical Dimensions:** - **Module Size:** 40mm × 60mm - **Antenna Size:** 50mm × 50mm (typical) - **Weight:** Approximately 10 grams **Chip Specifications:** - **Core Chip:** NXP MFRC522 - **Chip Code:** MFRC52201T/0FE, 3C (specific batch codes may vary) - **Chip Architecture:** 32-bit ARM Cortex-M0 processor - **Memory:** 8KB EEPROM, 512 bytes SRAM - **Crypto Support:** MIFARE Crypto1, AES-128 (limited) **Performance Characteristics:** - **Reading Distance:** Up to 50mm (depending on antenna design and tag type) - **Data Transfer Rate:** Up to 848kBaud - **Temperature Range:** -20°C to +85°C - **Clock Frequency:** 27.12MHz crystal oscillator *Note: These technical parameters are reference data. For precise specifications and custom requirements, please contact our backend management team.* ## My Experience with RFID Technology My fascination with RFID technology began during my college years when I discovered I had a natural aptitude for understanding wireless communication systems. This personal skill helped me quickly grasp the principles behind the MFRC522 RFID reader. I remember my first successful project—creating a library management system that could track books automatical