►184◄RFID MFRC-522 RC522 IC card sensing module Arduino S50 Fudan card key

Introduction

to RC5

22 wafers: MF RC522 is a high-integration read and write card chip used in 13.56MHz contactless communication. It is a low-voltage, low-cost, and small-sized contactless read and write card chip launched by NXP for the "three meters" application. It is a good choice for the research and development of smart instruments and portable handheld devices. The MF RC522 utilizes advanced modulation

and d

emod

ulatio

n concepts t

o full

y integrate all types of passive contactless communication methods and protocols at 13.56MHz. Supports 14443A compatible transponder signals. The digital part handles ISO1444

3A fra

me and err

or det

ection. In addition, i

t also

supports fast CRYPTO1

encry

ption algorithm

and ve

rbally verify MI

FARE s

eries products.

The MF

RC522 supports the MIFARE series of higher-speed contactless communication, w

ith a

bidirectional d

ata tr

ansmission rate of

up to

424kbit/s. As a new

membe

r of the 13.56MHz hi

gh-int

egra

tion r

ead and write

card

series chip family,

the MF

RC5

22 has

many si

milari

ties with the MF R

C500 a

nd the MF RC53

0, and

also has many character

istics

and differenc

es. It

uses SPI mode f

or com

munication with the host, which is conducive to reducing connections, reducing PCB board size and reducing costs.   Introduction to RFID module: The MF522-AN module adopts Philips

MFRC52

2 original chip design card reading circuit, which is easy to use and low cost. It is suitab

le for

users who are advanced appli

cation

s such as equipment development and card reader development, and users who need to design/production of RF card terminals. This

module

can be directly loaded into various card reader mold

s. The

module adopts a voltage of 3.3V, and can be directly connected to any CPU motherboard of the use

r thro

ugh a few simple lines of th

e SPI

interface,

which

can ensure the module's stable a

nd rel

iable working and long card reading distanc

e; I

ntro

duction to electrical parameters: Working current: 13-26mA/DC 3.3V Idle current: 10-13mA/DC 3.3V Sleep current: <80uA Peak current: <30mA Operating frequency: 13.56MHz Supported card types: mifare1 S50, mifare1 S70, mifare UltraLight, mifare Pro, mifare Desfire Size: 40mm×60mm Ambient working temperature: -20-80 degrees Celsius Ambient storage temperature: -40-85 degrees Celsius Relative humidity in the environment: 5%-95% relative humidity   Module interface SPI parameters: Data transmission rate: maximum 10Mbit/s   Shipping list: RFID-RC522 module one. A standard S50 blank card. S50 special-shaped card (the keychain shape shown in the picture). One straight line and one bend line. RFID white card and sensor buckle instructions: Mifare Classic is a Mifare Classic used in parking lots in Taiwan. This RFID card has 1KB of EEPROM memory. In order to properly manage and achieve the multi-use function of one card, this memory space is divided into 16 sections, each section has 4 blocks, and Block 0 of section 0 contains the card's unique identification code UID (read only cannot be changed), also known as the "manufacturer identification code", Manufacturer Code. Programmers can plan and store contents by themselves according to different application occasions, for example: Section 1 can store employee numbers, Section 2 storage department numbers (areas where employees can enter and exit), Section 3 can store parking time, etc., and a card has multiple identification purposes. Mifare's control block (Trailer Block) Block 3 of a section is also called a control block (Sector Trailer, Trailer Block or Security Block). If the data structure shown above is imagined as a 16-story building, the control block is equivalent to the password lock of each floor; you must enter the correct password first when entering and exiting the floor, and each floor has two sets of passwords. The control block contains two sets of passwords (6-bit tuples each), as well as access control bits (4-bit tuples, but only the first 3-bit tuples are used). The preset of the key B is visible, while the key A is displayed as 00 during scanning due to security considerations. The access control bit is used to control whether each block in the segment (block 0 to block 3) can be accessed, written or other operations, and decides to verify through key A or key B. 0xFF0780 is the "factory preset value" of the control block, which represents: Key A is not visible; If verified by key A or key B, blocks 0~2 of this section can be read or written. If the key A is verified, the access control bits and key B of the section can be read or rewritten, and the key A can also be rewritten.