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AT88SC3216C
(Rev.:2008)

CryptoMemory Specification For Standard Mode of Operation

Atmel Corporation 

2.1 Embedded Applications

A 2-wire serial interface running at 1.0 MHz is used for fast and efficient communications with up

to 15 devices that may be individually addressed. CryptoMemory is available in industry stan-

dard 8-lead packages with the same familiar pinout as 2-wire serial EEPROM’s supporting only

the synchronous communications protocol.

2.2 Smart Card Applications

CryptoMemory offers the ability to communicate with virtually any smart card reader using the

asynchronous T=0 protocol defined in ISO 7816-3. For devices with 32K bits of user memory

and larger, communication speeds up to 153,600 baud are supported by utilizing ISO 7816-3

Protocol and Parameter Selection. All CryptoMemory devices in smart card module form will

also communicate using a synchronous 2-wire serial interface.

Figure 2-1. Block Diagram

VCC

GND

Power

Management

Authentication,

Encryption and

Certification Unit

SCL/CLK

SDA/IO

Synchronous

Interface

Asynchronous

ISO Interface

Data Transfer

Password

Verification

EEPROM

RST

Reset Block

Answer to Reset

2.3 Scope and Purpose of This Document

This document covers only the Standard Mode of operation of CryptoMemory. The other modes

of operation are the Authentication and Encryption Modes. This document provides all the infor-

mation needed to utilize CryptoMemory in the Standard Mode. The scoping of this document

allows for free distribution without formal requirements of any user agreements and serves the

purpose of developing applications using only the Standard Mode of operation. Documents con-

taining detailed description of the cryptographic technology, operation and function of the

Authentication and Encryption Modes of CryptoMemory are secure and so only available under

Non-Disclosure and Limited Licensing Agreements (NDA and LLA). Contact your regional

Atmel sales office to obtain these secure documents.

2 AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C

5210B–SMIC–11/08

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