Any need to modify the chip, software and hardware were perfectly compatible FM17550 FM17522/FM17520/RC522/CV520, change can go directly to use, FM17550 FM17522/FM17520/RC522 CV520 hardware and software is fully compatible with

The key thing 3 times! Cost-effective! Cost-effective! Cost-effective!

Chip area, 13.56 M, speaking, reading and writing before RC522 NXP's flagship product is the highest utilization rate, fudan micro launch FM17520 later, FM17522 or FM17550 are too expensive, can now have A chip at the same time, the hardware and software is compatible with all chips, performance is stable, also compatible with A/B card, the key is, cost-effective!

Details will be able to communicate with 13802914278 Liu Gong

Work in 13.56 MHz chip, non-contact, speaking, reading and writing support ISO/IEC 14443 AB/MIFARE, without peripheral circuit, other Si522 internal transmitter antenna can drive, speaking, reading and writing and the ISO/IEC 14443 AB/MIFARE card and answering machine communication, the receiver module provides A powerful and efficient circuit to demodulation decoding the ISO/IEC 144443 AB/compatible MIFARE card and transponder signal, digital module processing complete ISO/IEC 14443 A frame and error detection function (parity and CRC)

Give you summary of chip parameters:
Highly integrated analog circuit, demodulation and decoding response
With buffer output drive, using the least amount of peripheral devices connected to the antenna
Support ISO/IEC 14443 AB/MIFARE
Reading and writing pattern of typical operating distance up to 50 mm, depends on the size and number of turns of the antenna
Read/write device mode support MIFARE card series
Support for multiple host interface
Support the ISO/IEC 14443 ab communication, higher rate of up to 848 KBD
64 bytes sent and received the FIFO buffer
Flexible interrupt mode
Low power consumption hard reset function
Software power mode
Programmable timer
Internal oscillator, connect the 27.12 MHz quartz crystal
2.5 V to 3.6 V power supply voltage
CRC coprocessor