NXP公司的MFRC522 是13.56 MHz 無接觸通信的高度集成的讀/寫IC,支持ISO/IEC 14443 A/MIFARE模式,兩個方向的傳輸速率高達848 kBd. MFRC522工作電壓2.5V到3.3V,提供SPI,串行UART和I2C總線接口,具有CRC協處理器和可編程I/O引腳,內部有自測試.本文介紹MFRC522主要特性, 簡化和詳細方框圖, 讀/寫模式, 總線接口圖以及典型應用方框圖.
MFRC522: Contactless reader IC
The MFRC522 is a highly integrated reader/writer IC for contactless communication at 13.56 MHz. The MFRC522 reader supports ISO/IEC 14443 A/MIFARE mode.The MFRC522’s internal transmitter is able to drive a reader/writer antenna designed to communicate with ISO/IEC 14443 A/MIFARE cards and transponders without additional active circuitry. The receiver module provides a robust and efficient implementation for demodulating and decoding signals from ISO/IEC 14443 A/MIFARE compatible cards and transponders. The digital module manages the complete ISO/IEC 14443 A framing and error detection (parity and CRC) functionality.
The MFRC522 supports MF1xxS20, MF1xxS70 and MF1xxS50 products. The MFRC522 supports contactless communication and uses MIFARE higher transfer speeds up to 848 kBd in both directions.
The following host interfaces are provided:
• Serial Peripheral Interface (SPI)
• Serial UART (similar to RS232 with voltage levels dependant on pin voltage supply)
• I2C-bus interface
MFRC522主要特性:
Highly integrated analog circuitry to demodulate and decode responses
Buffered output drivers for connecting an antenna with the minimum number of external components
Supports ISO/IEC 14443 A/MIFARE
Typical operating distance in Read/Write mode up to 50 mm depending on the antenna size and tuning
Supports MF1xxS20, MF1xxS70 and MF1xxS50 encryption in Read/Write mode
Supports ISO/IEC 14443 A higher transfer speed communication up to 848 kBd
Supports MFIN/MFOUT
Additional internal power supply to the smart card IC connected via MFIN/MFOUT
Supported host interfaces
SPI up to 10 Mbit/s
I2C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed mode
RS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin voltage supply
FIFO buffer handles 64 byte send and receive
Flexible interrupt modes
Hard reset with low power function
Power-down by software mode
Programmable timer
Internal oscillator for connection to 27.12 MHz quartz crystal
2.5 V to 3.3 V power supply
CRC coprocessor
Programmable I/O pins
Internal self-test
圖1.MFRC522簡化方框圖
圖2.MFRC522詳細方框圖
圖3.MFRC522讀/寫模式
圖4.MFRC522 I2C總線接口圖
圖5.MFIN和MFOUT信號路經圖
圖6.MFRC522典型應用方框圖
詳情請見:
http://www.nxp.com/acrobat_download/datasheets/MFRC522_33.pdf
MFRC522: Contactless reader IC
The MFRC522 is a highly integrated reader/writer IC for contactless communication at 13.56 MHz. The MFRC522 reader supports ISO/IEC 14443 A/MIFARE mode.The MFRC522’s internal transmitter is able to drive a reader/writer antenna designed to communicate with ISO/IEC 14443 A/MIFARE cards and transponders without additional active circuitry. The receiver module provides a robust and efficient implementation for demodulating and decoding signals from ISO/IEC 14443 A/MIFARE compatible cards and transponders. The digital module manages the complete ISO/IEC 14443 A framing and error detection (parity and CRC) functionality.
The MFRC522 supports MF1xxS20, MF1xxS70 and MF1xxS50 products. The MFRC522 supports contactless communication and uses MIFARE higher transfer speeds up to 848 kBd in both directions.
The following host interfaces are provided:
• Serial Peripheral Interface (SPI)
• Serial UART (similar to RS232 with voltage levels dependant on pin voltage supply)
• I2C-bus interface
MFRC522主要特性:
Highly integrated analog circuitry to demodulate and decode responses
Buffered output drivers for connecting an antenna with the minimum number of external components
Supports ISO/IEC 14443 A/MIFARE
Typical operating distance in Read/Write mode up to 50 mm depending on the antenna size and tuning
Supports MF1xxS20, MF1xxS70 and MF1xxS50 encryption in Read/Write mode
Supports ISO/IEC 14443 A higher transfer speed communication up to 848 kBd
Supports MFIN/MFOUT
Additional internal power supply to the smart card IC connected via MFIN/MFOUT
Supported host interfaces
SPI up to 10 Mbit/s
I2C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed mode
RS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin voltage supply
FIFO buffer handles 64 byte send and receive
Flexible interrupt modes
Hard reset with low power function
Power-down by software mode
Programmable timer
Internal oscillator for connection to 27.12 MHz quartz crystal
2.5 V to 3.3 V power supply
CRC coprocessor
Programmable I/O pins
Internal self-test
圖1.MFRC522簡化方框圖
圖2.MFRC522詳細方框圖
圖3.MFRC522讀/寫模式
圖4.MFRC522 I2C總線接口圖
圖5.MFIN和MFOUT信號路經圖
圖6.MFRC522典型應用方框圖
詳情請見:
http://www.nxp.com/acrobat_download/datasheets/MFRC522_33.pdf
粵公網安備 44030902003195號