Introduction

This document describes the functionality and electrical specifications of the contactless reader/writer MFRC523.

General description

The MFRC523 is a highly integrated reader/writer for contactless communication at 13.56 MHz. The MFRC523 reader supports ISO/IEC 14443 A/MIFARE mode.

Features and benefits

Highly integrated analog circuitry to demodulate and decode responses

Buffered output drivers for connecting an antenna with the minimum number of external components

Supports ISO/IEC 14443 A/MIFARE

Supports ISO/IEC 14443 B Read/Write modes

Typical operating distance in Read/Write mode up to 50 mm depending on the antenna size and tuning

Supports MIFARE Mini, MIFARE 1K and MIFARE 4K encryption in Read/Write mode

Supports ISO/IEC 14443 A higher transfer speed communication at 212 kBd, 424 kBd and 848 kBd

Supports MFIN/MFOUT

Additional internal power supply to the smart card IC connected via MFIN/MFOUT

Supported host interfaces

‹SPI up to 10 Mbit/s

‹I2C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed mode

‹ RS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin voltage supply

FIFO buffer handles 64 byte send and receive

Flexible interrupt modes

Hard reset with low power function

Power-down by software mode

Programmable timer

Internal oscillator for connection to 27.12 MHz quartz crystal

2.5 V to 3.3 V power supply

CRC coprocessor

Programmable I/O pins

Internal self-test