AT88SC25616C-MP 查看數據表（PDF） - Atmel Corporation

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AT88SC25616C-MP

CryptoMemory 256 Kbit

Atmel Corporation 

Description

Smart Card

Applications

Embedded

Applications

The AT88SC25616C member of the CryptoMemory® family is a high-performance secure mem-

ory providing 256 Kbits of user memory with advanced security and cryptographic features built

in. The user memory is divided into 16 2-Kbyte zones, each of which may be individually set with

different security access rights or effectively combined together to provide space for 1 to 16 data

files.

The AT88SC25616C 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 AT88SC25616C 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.

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

encrypted checksums, the AT88SC25616C provides a secure place for storage of sensitive

information 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 com-

munications with up to 15 devices that may be individually addressed. The AT88SC25616C is

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

EEPROMs.

Figure 2. Block Diagram

VCC

GND

Power

Management

Authentication,

Encryption and

Certification Unit

Random

Generator

SCL/CLK

SDA/IO

Synchronous

Interface

Asynchronous

ISO Interface

Data Transfer

Password

Verification

EEPROM

RST

Reset Block

Answer to Reset

Pin

Descriptions

Supply Voltage (VCC)

Clock (SCL/CLK)

The VCC input is a 2.7V to 5.5V positive voltage supplied by the host.

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.

2 AT88SC25616C

5017HS–SMEM–11/08

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