NXP reader chip
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MFRC531 belongs to the latest series of highly integrated reader IC, contactless communication can achieve 13.56 MHz. This series of card reader IC offers:

Excellent modulation and demodulation performance, which can realize the passive contactless communication

Various methods and protocols

Fully integrated type small package

Compatible with MFRC500, MFRC530 and SLRC400 pins

Support all the ISO/IEC 14443 and ISO/IEC 14443 B protocol layer communications standards:

Correct installation oscillator, power supply, coil and other additional components.

Correct deployment of ISO/IEC 14443-4 and/or standardized protocols such as ISO/IEC 14443 B protocol

Use up to the standard of ISO/IEC 14443 B the boon wisdom pu semiconductor devices may be infringement of the patent right for a third party.

MFRC531 supports the use of MIFARE high baud rate (see section 9.12 on page 38) for contactless communication. Provide a stable and efficient demodulation receiver module/decoding circuit scheme of compatible transponder signals (see section 9.10 on page 32).

Digital module management complete SO/IEC 14443 standard into frames and error detection (parity and CRC). In addition, it also supports fast MIFARE security algorithm, used for authentication, MIFARE product (see section 9.14 on page 40].

Internal transmitter module (see section 9.9 on page 29) driven directly without any additional active circuit for 100 mm closer to the work as far as design of antenna.

Parallel interface can be directly connected to any 8-bit microprocessor to ensure that the card reader/terminal design flexibility. In addition, also supports the compatibility of serial peripheral interface (SPI) the first section 9.1.4) (see page 9.

Characteristics and advantages

Highly integrated analog circuit for demodulation and decoding card/tag response

Buffer output drive can realize the antenna connection with minimal external components

As far as 100 mm closer to the working distance

At the same time support the ISO/IEC 14443 standards and ISO/IEC 14443 B

Support MIFARE Mini, MIFARE 1 k and MIFARE 4 k

To MIFARE higher baud rate for contactless communication (maximum 424 kBd)

Crypto1 and safety non-volatile internal main memory

Compatible with MFRC500, MFRC530 and SLRC400 pins

Microprocessor parallel interface with internal address latch and IRQ lines

SPI compatibility

Flexible interrupt handling

Automatic detection of microprocessor parallel interface type

64 bytes sent and received the FIFO buffer

Hard reset by low power function

Software control type power mode

Programmable timer

Unique serial number

A user programmable launch configuration

Facing the bits and bytes oriented as a way for the frame

For analog, digital and transmitter module, independent power supply pins

In view of the low phase jitter buffer and optimization of the internal oscillator can achieve 13.56 MHz quartz connection

Clock frequency filtering

Closer and closer to the application of the sender is the working voltage of 3.3 V to 5 V

Digital module of the working voltage of 3.3 V or 5 V

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