【 Weak current College 】 non-contact IC card read-write module MFRC530 works and application 】

Keywords: 1356MHzISO144431356MFRC530
Time: location: user: label type: operating frequency: standard: implementation of the company: solution providers: hardware providers:
【 Summary 】 non-contact IC card read-write module MFRC530 principle and application of
Summary: MFRC530 (Mifare Reader Circuit) is the Philips company latest a non-contact IC card read-write module. Using the module design of IC card card reader support 13.56 MHz under all types of contactless communication methods and protocols applicable to the various standards based on ISO/IEC14443A and requires low-cost, small size, high performance, single-supply of contactless communication applications.
Keywords: MFRC530; non-contact MFRC530; IC card is applied to 13.56 MHz contactless IC card read-write high integration module. The modules utilize advanced modulation and demodulation concept, fully integrated in 13.56 MHz all types of passive contactless communication method and Protocol. All the layers support ISO14443A MFRC530 means of communication.
Internal part of the Dispatcher does not need to increase the active circuit can direct drive close operation of antenna (up to 100 mm).
Receiver section provides a robust and effective demodulation and decoding circuit for ISO14443A compatible transponder signals.
The digital part of the deal with ISO14443A frames and error detection (parity and CRC). In addition it also support fast MIFARE Classic security algorithm, used to validate the MIFARE family of products.
Easy parallel interface can be directly connected to any 8 bit microprocessor, this gives the reader/terminal design provides great flexibility. In addition, it supports SPI interface.
The main features: MFRC530
(1) highly integrated analog circuit for IC card response signal demodulation and decoding;
(2) buffer output drives use a minimum of external components connected to the antenna;
(3) support for ISO14443A;
(4) support MIFARE dual interface smart card and MIFARE Classic agreement;
(5) support the baud rate up to 424 kHz contactless communication;
(6) compatible with SPI interface;
(7) flexible interrupt handling;
(8) Programmable timer;
(9) near distance (up to 100 mm);
(10) with low power consumption of the hardware reset;
(11) software for power-down mode;
(12) parallel microprocessor interface with internal address latches and IRQ line;
(13) automatically detects the type of microprocessor parallel interface; (14) 64 byt FIFO buffer is sent and received;
(15) for bits and bytes of frames;
(16) a unique serial number;
(17) Crypto1 and a reliable internal non-volatile memory key;
(18) MHz crystal oscillator connected 13.56 internal oscillation buffer with optimized low jitter;
(19) in the near distance, the dispatcher uses voltage 3.3 ~ 5V;
(20) the digital part 3.3 v or 5 V power supply
1 internal structure and PIN description
1.1 internal structure
Figure 1 shows the internal structure of MFRC530.

Parallel micro-controller interface to automatically detect the connection of 8 bit parallel interface of type that contains a two-way FIFO buffer and a configurable interrupt output, which provides connections to various MCU provides great flexibility, even with very low-cost devices also meet the high-speed contactless communication requirements.
Data processing components to perform data parallel serial conversion. It supports frames including CRC and parity, it completely transparent mode, enabling all layers. ISO14443A
Status and control section allows the device to be configured to adapt to the environment, and makes performance tuning to the best State. When MI-FAREStandard and MIFARE products and communicate using high-speed Crypto1 stream cipher unit and a reliable non-volatile key storage.
Analog circuit contains a low-impedance bridge drive output send parts, this makes the maximumoperating distance up to 100mm, receiver can detect and decode the signal very weak response. As a result of the very advanced technology, the receiver is no longer the limit operation distance factor.
1.2 pin description
The device is 32 feet SO package. Devices using three separate power supply for EMC characteristics and signal decoupling achieved the best performance. MFRC530 has excellent RF performance and analog and digital parts can adapt to different operating voltage.
1.2.1 antenna
Non-contact type antenna using the following four pin:
In order to drive through the antenna, MF TX1 and TX2 RC530 13.56 MHz energy carrier. According to the register set to send data to a signal by sending.
IC cards using RF field load modulation to respond. Antennas pick up signal antenna matching circuit to RX feet. MF RC530 internal receiver on theSignal detection and demodulation and according to the register set for processing. Then send the data to the parallel interface to read by the micro-controller.
MFRC530 on driving part using a separate power supply.

1.2.2 analog supply
In order to achieve optimal performance, the simulation also MFRC530 using a separate power supply. Its oscillator, analog modem and decoder circuits power supply. 1.2.3
MF Digital part use separate RC530.
1.2.4 auxiliary pin
You can select the internal signal driving the PIN AUX. It as a design and test.
1.2.5 Reset PIN
Reset PIN RSTPD prohibits the internal current source and the clock and make MFRC530 from microcontroller bus interface disengaged. If you execute the MFRC530 RST-PD release on time.
1.2.6 oscillator
13.56 MHz crystal oscillator with fast-on-chip buffers and connected to the OSCIN OSCOUT. If the device uses an external clock is available from the OSCIN input.
1.2.7 MIFARE interface
MFRC530 support MIFARE active antenna concept. It can handle pin MFIN and MFOUT Department MIFARE core module of the baseband signal NPAUSE and KOMP.
MIFARE interface can be used in the following ways and analog or digital MFRC530 partially separate communication:
1) analog circuits can be used independently by MIFARE interface. In this case, connect the external MFIN produces NPAUSE signal.
MFOUT provides KOMP signal.
2) digital circuits are available through the MIFARE interface driver external signal circuit. In this case, the in-house MFOUT NPAUSE signal MFIN connected to an external signal input of KOMP.
1.2.8
The following list of 16 pins are used to control the parallel interface:
2 application
Figure 3 shows the MFRC530 in non-contact IC card card reader in a typical application circuit.
The system adopts microcomputer control core 89C51, complete data acquisition, processing, storage and control system capabilities to P0 port and connects to the data bus MFRC530, achievable and RF card data wireless transmission. P2.7 as the movie selected end MFRC530, low level valid. RD, WR control read and write, MFRC530 INT0 received from IC card interrupt request and perform interrupt the program.


MFRC530 is and RF cards for wireless communication of core modules, and also the reader to read and write RF card key interface chips. It according to the register set to send the data in the buffer are sent to the modem, through the TX1, TX2 pin driver's antenna to send to the form of electromagnetic waves, RF card using RF field load modulation to respond. Antenna picks up RF card response signal antenna matching circuit to the RX pin, MFRC530 internal receive buffer on signal detection and demodulation and according to the register set for processing. The processed data is sent to the parallel interface chip reads.

3 closing
Non-contact IC card is based on radio frequency electromagnetic induction principle. It reads or writes the card in the reader within a certain distance away near to implement data exchange, without any contact, use a very convenient, fast, and not easily damaged. Accordingly, in public transport, access control, campus, enterprises and institutions, such as personnel management, entertainment and other aspects of broad application prospects. References
[1] room, Wang jinfeng xiaocui. scm utility system design technology [M]. defense industry press 2001., author: Charles Lee Huang, Mr. Guo Wei, (Chengdu University of technology school of information engineering)