2

AT88SC0204CRF

5022CS–CRRF–12/06

Block Diagram

Figure 1. Block Diagram

Communications

All personalization and communication with this device is performed through the RF

interface. The IC includes an integrated tuning capacitor, enabling it to operate with only

the addition of a single external coil antenna.

The RF communications interface is fully compliant with the electrical signaling and RF

power specifications in ISO/IEC 14443-2:2001 for Type B only. Anticollision operation and

frame formatting are compliant with ISO/IEC 14443-3:2001 for Type B only.

ISO/IEC 14443 nomenclature is used in this specification where applicable. The

following abbreviations are utilized throughout this document. Additional terms are

defined in the section in which they are used.

•

PCD – Proximity Coupling Device: the reader/writer and antenna

•

PICC – Proximity Integrated Circuit Card: the tag/card containing the IC and

antenna

•

RFU – Reserved for Future Use: any feature, memory location, or bit that is held as

reserved for future use

•

$ xx – Hexadecimal Number: denotes a hex number “xx” (Most Significant Bit on

left)

Anticollision Protocol

When the PICC enters the 13.56 MHz RF field of the host reader (PCD), it performs a

power on reset (POR) function and waits silently for a valid Type B polling command.

The CryptoRF PICC processes the antitearing registers as part of the POR process.

The PCD initiates the anticollision process by issuing an REQB or WUPB command.

The WUPB command activates any card (PICC) in the field with a matching AFI code.

RF Interface

AC1

C

AC2

Over

Voltage

Clamp

VSS

V

DD

Regulator

Clock

Extraction

Data

Extraction

Command

and

Response

EEPROM

Data Transfer

Password

Verification

Frame Formatting

and

Error Detection

Interface

Anticollision

Random Number

Generator

Authentication

Encryption and

Certification Unit