RFID
来自Jack's Lab
目录 |
1 Reader Chip
1.1 EM4095
Use in an RFID basestation to perform the following functions:
- antenna driving with carrier frequency - AM modulation of the field for writable transponder - AM demodulation of the antenna signal modulation induced by the transponder communicate with a microprocessor via simple interface.
Features:
- Integrated PLL system to achieve self adaptive carrier frequency to antenna resonant frequency
- No external quartz required
- 100 to 150 kHz carrier frequency range
- Multiple transponder protocol compatibility (e.g. EM400X, EM4050, EM4150, EM4070, EM4170, EM4069)
- Sleep mode 1µA
- USB compatible power supply range
- Small outline plastic package SO16 or PSOP2 16
http://www.emmicroelectronic.com/products/rf-identification-security/rf-reader-ics/em4095
1.2 MFRC522
The MFRC522 supports all variants of the MIFARE Mini, MIFARE 1K, MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus RF identification protocols.
Features:
- Support RFID frequency 13.56MHz
- Supports ISO/IEC 14443 A/MIFARE and NTAG
- 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
- 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
- Power-down by software mode
- Internal oscillator for connection to 27.12 MHz quartz crystal
- 2.5 V to 3.3 V power supply
2 Antenna
- http://ww1.microchip.com/downloads/en/AppNotes/00678b.pdf
- http://ww1.microchip.com/downloads/en/appnotes/00710c.pdf
- http://www.sonnetsoftware.com/support/files/appnote/SAN-206A%20RFID%20Antenna%20Design%200602.pdf
- https://www.sabanciuniv.edu/mdbf/telecom/eng/RWL/report.pdf
3 Card Chip
UHF:
HF (e.g. 13.56MHz):
LF (e.g. 125KHz):
4 Reference
