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5015HS–SMEM–11/08

AT88SC6416C

Description

ory providing 64 Kbits of user memory with advanced security and cryptographic features built

in. The user memory is divided into 16 512-byte zones, each of which may be individually set

with different security access rights or effectively combined together to provide space for one to

sixteen data files.

Smart Card

Applications

The AT88SC6416C provides high security, low cost, and ease of implementation without the

need for a microprocessor operating system. The embedded cryptographic engine provides for

dynamic and symmetric mutual authentication between the device and host, as well as perform-

ing stream encryption for all data and passwords exchanged between the device and host. Up to

four unique key sets may be used for these operations. The AT88SC6416C offers the ability to

communicate with virtually any smart card reader using the asynchronous T = 0 protocol (Gem-

plus Patent) defined in ISO 7816-3. Communication speeds up to 153,600 baud are supported

by utilizing ISO 7816-3 Protocol and Parameter Selection.

Embedded

Applications

Through dynamic and symmetric mutual authentication, data encryption, and the use of

encrypted checksums, the AT88SC6416C provides a secure place for storage of sensitive infor-

mation within a system. With its tamper detection circuits, this information remains safe even

under attack. A 2-wire serial interface running at 1.0 MHz is used for fast and efficient communi-

cations with up to 15 devices that may be individually addressed. The AT88SC6416C is

available in industry standard 8-lead packages with the same familiar pinout as 2-wire serial

EEPROMs.

Figure 2. Block Diagram

Pin

Descriptions

Supply Voltage (V

The V

Clock (SCL/CLK)

In the asynchronous T = 0 protocol, the SCL/CLK input is used to provide the device with a car-

rier frequency f. The nominal length of one bit emitted on I/O is defined as an “elementary time

unit” (ETU) and is equal to 372/f. When the synchronous protocol is used, the SCL/CLK input is

used to positive edge clock data into the device and negative edge clock data out of the device.

Random

Generator

Authentication,

Encryption and

Certification Unit

EEPROM

Answer to Reset

Data Transfer

Password

Verification

Reset Block

Asynchronous

ISO Interface

Synchronous

Interface

Power

Management

VCC

GND

SCL/CLK

SDA/IO

RST