AT88SC0808C-CI datasheet, PDF - EEWORLD Datasheet

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AT88SC0808C-CI: DescriptionCryptoMemory 8 Kbit; Categorystorage storage; File Size173KB，14 Pages; ManufacturerAtmel (Microchip)

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AT88SC0808C-CI Overview

CryptoMemory 8 Kbit

AT88SC0808C-CI Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Atmel (Microchip)
package instruction	,
Reach Compliance Code	compli

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Features

•

One of a Family of Devices with User Memories from 1 Kbit to 1 Mbit

•

8-Kbit (1-Kbyte) EEPROM User Memory

– Eight 128-byte (1-Kbit) Zones

– Self-timed Write Cycle (5 ms)

– Single Byte or 16-byte Page Write Mode

– Programmable Access Rights for Each Zone

2-Kbit Configuration Zone

– 37-byte OTP Area for User-defined Codes

– 160-byte Area for User-defined Keys and Passwords

High Security Features

– 64-bit Patented Dynamic Symetric Mutual Authentication Protocol (Under

Exclusive Patent License from

ELVA)

– Encrypted Checksum

– Stream Encryption

– Four Key Sets for Authentication and Encryption

– Eight Sets of Two 24-bit Passwords

– Anti-tearing Function

– Voltage and Frequency Monitor

Smart Card Features

– ISO 7816 Class A (5V) or Class B (3V) Operation

– ISO 7816-3 Asynchronous T = 0 Protocol

– Multiple Zones, Key Sets and Passwords for Multi-application Use

– Synchronous 2-wire Serial Interface for Faster Device Initialization

– Programmable 8-byte Answer-To-Reset Register

– ISO 7816-2 Compliant Modules

Embedded Application Features

– Low Voltage Operation: 2.7V to 5.5V

– Secure Nonvolatile Storage for Sensitive System or User Information

– 2-wire Serial Interface

– 1.5 MHz Compatibility for Fast Operation

– Standard 8-lead Plastic Packages

– Same Pinout as 2-wire Serial EEPROMs

High Reliability

– Endurance: 100,000 Cycles

– Data Retention: 10 years

– ESD Protection: 4,000V min

•

CryptoMemory

8 Kbit

AT88SC0808C

Summary

•

Table 1.

Pin Configuration

Pad

VCC

GND

SCL/CLK

SDA/IO

RST

Description

Supply Voltage

Ground

Serial Clock Input

Serial Data Input/Output

Reset Input

ISO Module Contact

Standard Package Pin

Card Module Contact

VCC = C1

RST = C2

SCL/CLK = C3

NC = C4

C5 = GND

C6 = NC

C7 = SDA/IO

C8 = NC

8-lead SOIC, PDIP or LAP

GND

VCC

SCL

SDA

Rev. 2024DS–SMEM–04/03

Note: This is a summary document. A complete document is

available under NDA. For more information, please contact your

local Atmel sales office.

Description

The AT88SC0808C member of the CryptoMemory family is a high-performance secure

memory providing 8 Kbits of user memory with advanced security and cryptographic

features built in. The user memory is divided into 8 128-byte zones, each of which may

be individually set with different security access rights or combined together to provide

space for 1 to 4 data files.

The AT88SC0808C provides high security, low cost, and ease of implementation with-

out the need for a microprocessor operating system. The embedded cryptographic

engine provides for dynamic, symmetric-mutual authentication between the device and

host, as well as performing stream encryption for all data and passwords exchanged

between the device and host. Up to four unique key sets may be used for these opera-

tions. The AT88SC0808C offers the ability to communicate with virtually any smart card

reader using the asynchronous T = 0 protocol defined in ISO 7816-3.

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

encrypted checksums, the AT88SC0808C provides a secure place for storage of sensi-

tive information within a system. With its tamper detection circuits, this information

remains safe even under attack. A 2-wire serial interface running at 1.5 MHz is used for

fast and efficient communications with up to 15 devices that may be individually

addressed. The AT88SC0808C is available in industry standard 8-lead packages with

the same familiar pinout as 2-wire serial EEPROMs.

Figure 1.

Block Diagram

Smart Card Applications

Embedded Applications

VCC

GND

Power

Management

Authentication,

Encryption and

Certification Unit

Random

Generator

Synchronous

Interface

SCL/CLK

SDA/IO

RST

Asynchronous

ISO Interface

Reset Block

Data Transfer

Password

Verification

Answer to Reset

EEPROM

Pin Descriptions

Supply Voltage (V

)

Clock (SCL/CLK)

The V

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 carrier frequency

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.

AT88SC0808C

2024DS–SMEM–04/03

AT88SC0808C

Serial Data (SDA/IO)

The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and

may be wired with any number of other open drain or open collector devices. An exter-

nal pull-up resistor should be connected between SDA and V

. The value of this

resistor and the system capacitance loading the SDA bus will determine the rise time of

SDA. This rise time will determine the maximum frequency during read operations. Low

value pull-up resistors will allow higher frequency operations while drawing higher aver-

age power supply current.

The AT88SC0808C provides an ISO 7816-3 compliant asynchronous answer to reset

sequence. When the reset sequence is activated, the device will output the data pro-

grammed into the 64-bit answer-to-reset register. An internal pull-up on the RST input

pad allows the device to be used in synchronous mode without bonding RST. The

AT88SC0808C does not support the synchronous answer-to-reset sequence.

Reset (RST)

Device Architecture

User Zones

The EEPROM user memory is divided into 8 zones of 1024 bits each. Multiple zones

allow for different types of data or files to be stored in different zones. Access to the user

zones is allowed only after security requirements have been met. These security

requirements are defined by the user during the personalization of the device in the con-

figuration zone. If the same security requirements are selected for multiple zones, then

these zones may effectively be accessed as one larger zone.

Table 2.

User Zones

ZONE

$000

128 bytes

User 0

–

$078

User 1

–

User 6

$000

–

$078

$000

128 bytes

User 7

–

$078

–

Control Logic

Access to the user zones occurs only through the control logic built into the device. This

logic is configurable through access registers, key registers and keys programmed into

the configuration zone during device personalization. Also implemented in the control

logic is a cryptographic engine for performing the various higher-level security functions

of the device.

2024DS–SMEM–04/03

AT88SC0808C-CI Related Products

	AT88SC0808C-CI	AT88SC0808C-ME	AT88SC0808C-PI
Description	CryptoMemory 8 Kbit	CryptoMemory 8 Kbit	CryptoMemory 8 Kbit
Is it Rohs certified?	incompatible	incompatible	incompatible
Maker	Atmel (Microchip)	Atmel (Microchip)	Atmel (Microchip)
Reach Compliance Code	compli	compli	compli

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