Description

The EM4056 is a CMOS integrated circuit intended foruse in contactless Read/Write transponders. The user’s configurable 2 kbits EEPROM memory contained in the chip is organised in 125 words of 16 bits, each word can be irreversibly protected against reading or/and writing attempts.

The user can define a password and protect part or all of the memory.

Features

• 2 kBits EEPROM organized in 125 words of 16 bits

• 3 words of 16 Bits Laser ROM for application number and serial number

• Programmable (OTP) Read and/or Write Protection on every word

• Programmable PIN coverage of the memory (0, 25, 50, 75 or 100 %)

• Power check for EEPROM Write operation

• Reader Talk First communication protocol

• Data transmission performed by Amplitude Modulation (ASK) and Biphase (CDP) coding

• Data rate 2 KBauds (Bit Period = 64 periods of carrier frequency)

• 100 to 150kHz carrier frequency

• Long range Read/Write operations

• Block check of data transmission (CRC)

• Anticollision protocol based on unique ID number(unlimited number of tags)

• PIN Code identification linked with counter of false attempts

• On chip arithmetic operation (addition, comparison of secret and non secret data, etc.)

• 340pF ± 3% on chip Resonant Capacitor

• No external supply buffer capacitance

• On chip Rectifier and Voltage Limiter

Applications

• Ticketing

• Hands free Access control

• Prothesis identification

• Prepayment devices

• Manufacturing automation with portable database

• Industrial logistics