AT88RF04C datasheet(2/158 Pages) ATMEL

2 / 158 page

AT88SC0808/1616/3216/6416CRF, AT88RF04C

5276C–RFID–3/09

Description

The CryptoRF

® family integrates a 13.56 MHz RF interface with CryptoMemory® security features. This product line is ideal for

RF tags and contactless smart cards that can benefit from advanced security and cryptographic features. The device is

optimized as a contactless secure memory for secure data storage without the requirement of an internal microprocessor.

For communications the RF interface utilizes the ISO/IEC 14443–2 and –3 Type B bit timing and signal modulation schemes,

and the ISO/IEC 14443-3 Slot-MARKER Anticollision Protocol. Data is exchanged half duplex at a 106k bit per second rate, with

a two byte CRC_B providing error detection capability. The RF interface powers the other circuits, no battery is required. Full

compliance with the ISO/IEC 14443 –2 and –3 standards provides both a proven RF communication interface, and a robust

anticollision protocol.

The five products in the CryptoRF family contain 4 Kbits to 64 Kbits of User Memory plus 2 Kbits of Configuration Memory. The

2 Kbits of Configuration Memory contains read/write password sets, four crypto key sets, security access registers for each user

zone, and password/key registers for each zone.

The CryptoRF command set is optimized for a multi-card RF communications environment. A programmable AFI register allows

this IC to be used in numerous applications in the same geographic area with seamless discrimination of cards assigned to a

particular application during the anticollision process.

Figure 1.

Block Diagram

EEPROM

Command

and

Response

Data Transfer

Authentication

Encryption

and

Certification

Unit

Frame

Formatting

and

Error

Detection

Interface

Password

Verification

Anticollision

Random Number

Generator

RF Interface

AC1

AC2

Over

Voltage

Clamp

Regulator

VDD

VSS

Clock

Extraction

Data

Extraction

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