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EM4056 Datasheet(PDF) 1 Page - EM Microelectronic - MARIN SA |
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EM4056 Datasheet(HTML) 1 Page - EM Microelectronic - MARIN SA |
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1 / 14 page  EM4056 Copyright © 2005, EM Microelectronic-Marin SA 1 www.emmicroelectronic.com 2KBIT Read/Write with ANTICOLLISION Contactless Identification Device Description The EM4056 is a CMOS integrated circuit intended for use 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. Serial and identification numbers are laser programmed during IC manufacturing. A reserved application numbering may be made available and customer specific on request. The EM4056 transmits its data towards the reader by amplitude modulation of the magnetic field and receives the commands from the reader in a similar way. Simple set of commands allow the dialogue between the EM4056 and the reader. Read and write commands access directly to an address of memory. The EM4056 has a built-in anticollision protocol which allows an unlimited number of transponders in the reader field to dialogue simultaneously. The transmission antenna is the only external element required, all the other elements are integrated on chip. 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 Typical Operating Configuration C2 EM4056 L Typical value for inductance L is 4.78mH at fO = 125 KHz C1 Fig. 1 EM MICROELECTRONIC - MARIN SA |
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