EM4170 Datasheet, PDF (2/13 Pages) EM Microelectronic - MARIN SA – 125kHz CRYPTO READ/WRITE Contactless Identification Device

EM4170
System Principle
Tranceiver
Data to be sent
to transponder
Modulator
Oscillator
Antenna
Driver
Filter
and
Gain
Demodulator
Transponder
Coil1
EM4170
Coil2
Block Diagram
Data decoder
Data received
from transponder
Signal on
Transceiver coil
RECEIVE MODE
Signal on
Transponder coil
RF Carrier
Data
Signal on
Transceiver coil
READ MODE
Signal on
Transponder coil
RF Carrier
Data
Fig. 2
Modulator
Encoder
Serial
Data
Coil1
Cr
Coil2
V_{POS_REG}
AC/DC
converter
GND
Clock
Extractor
Data
Extractor
V_DD
Power
Cs
Control
Sequencer
Command
Decoder
RESET
PWR
Control
Logic
EEPROM
Crypto-
Algorithm
Copyright  2002, EM Microelectronic-Marin SA
2
Fig. 3
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