RFID

2017年7月17日 (一) 12:40的版本

1 Overview

2 Reader Chip

2.1 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

2.2 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

RC522 Datasheet

3 Antenna

4 Card Chip

UHF:

HF (e.g. 13.56MHz):

LF (e.g. 125KHz):

@@ 第77行： / 第77行： @@
-'''HF:'''
+'''HF (e.g. 13.56MHz):'''
 * [http://upload.digoodcms.com/30/editor_66_NXP%20series.pdf NXP series.pdf]
@@ 第86行： / 第86行： @@
-'''LF:'''
+'''LF (e.g. 125KHz):'''
 * [http://upload.digoodcms.com/30/editor_80_ATA5577.pdf T5577.pdf]