Universal encoding-decoding and read-write device and method for non-contacting IC card

Abstract

The invention discloses a non-contact IC card universal coding decoding and reading and writing device and method, which strengthens the versatility of the hardware circuit, widens the coding and decoding range of the hardware circuit, reduces the power consumption of the hardware circuit, and improves the electromagnetic Energy conversion efficiency. The technical solution is: the device includes an antenna adjustment circuit, a synchronization / clock circuit, a microprocessor controller, a PCD / VCD command frame modulation control circuit, a PCD / VCD command frame encoding circuit, and RF signal detection / interference removal / Analog signal processing circuit, coded signal interference processing circuit, PICC / VICC coded signal digital quantization processing / deinterference circuit, coded signal processing circuit, PICC / VICC coded signal demodulation processing circuit, PICC / VICC data output circuit. The device also includes a non-contact IC card encoding, decoding, reading and writing method and self-adaptive algorithm. The invention is applied to the fields of universal encoding, decoding and reading and writing of IC cards.

Description

technical field [0001] The invention relates to a universal code decoding and reading and writing device for an IC card, in particular to a universal code decoding and reading and writing device for a non-contact (Radio Frequency Identification, RFID) IC card based on a frequency point of 13.56 MHz. Background technique [0002] The non-contact IC card system based on 13.56MHz frequency is being widely used, including IC card electronic wallet application, urban public transportation industry, wireless communication field, health care industry, closed place management, identification, telephone communication, building security system and more. Especially in the banking service system, IC smart cards have gradually matured to serve the public instead of the old magnetic cards. [0003] At the same time, the electronic label market is heating up at an unprecedented rate. The electronic label market is different from the non-contact smart IC card (including contact smart card...

AI Technical Summary

Problems solved by technology

First of all, the versatility of existing IC card read-write chips is not strong enough, and the range of encoding and decoding capabilities is not wide enough. A read-write chip can only read and write one type of IC card. For example, the reader-writer of SONY company can only read and write IC card of SONY Felica technical standard

Secondly, the circuit power consumption of these read-write chips is not small enough, and the conversion efficiency of electromagnetic energy is not high enough.

Most of the read-write chips do not consider the energy consumption of the circuit under the premise of pursuing the integrity of the IC card read-write function, consume a large amount of electric energy and generate a lot of heat (for example, the MFRC500 chip current of the Philips company described The consumption can reach 150mA, but the peak current consumption of the designed circuit does not exceed 50mA), which makes the circuit work unstable, or cannot be directly connected to the USB power supply of an external computer, etc., thereby inhibiting the application and performance

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