EMTG96 datasheet(2/3 Pages) EMMICRO

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Theseus™ Gold 96 3G

EMTG96-3G

www.emmicroelectronic.com

Introduction

The EMTG96-3G, also known as THESEUS™ Gold 96

3G, is a member of the Theseus family of devices

designed specifically for smart card applications. It is

software compatible with the industry standard 8051

micro-controller, to guarantee the maximum availability

of qualified software. The hardware implementation of

the core is a modern design not relying on microcode,

with an increase of up to 4 times on a standard 8051's

clocks per instruction.

Security

the

family

devices

makes

them

particularly

suitable

electronic

commerce

and

sensitive data areas. This is accomplished in hardware,

with not only protection against out of parameter

operation

the

device,

but

hardware

memory

management to protect against software security

attacks. The CPU clock is derived from its own internal

oscillator, so preventing attacks by clock manipulation,

or extrapolating program execution by monitoring

current variations on clock edges.

The need to support the emerging multifunction cards

requires that the device under software control can

download an application and run it when the device is

in the field embedded in a plastic card. This application

can be in the form of a script to be executed by an

interpreter or as a raw binary directly executed by the

processor. The device has to be protected against the

downloading of attack software designed to corrupt or

uncover the working or data contained in the device.

Traditionally this has been a software function, which

relies on the total integrity of the embedded software.

EMTG96-3G implements the first level of protection in

hardware. This maximises the security of the device,

and allows the reusability of developed certified code,

by isolating it from the actual hardware implementation

of the device. This protection mechanism allows for a

Secure Operating System to be embedded into the

device at manufacture, which has access rights to

features of the device that are denied to applications

that can be loaded into the device at manufacture or in

the field.

The Secure Operating System allocates to each

application programme, areas of the memory resources

of the device. The hardware then ensures that when

the application code is executing only accesses to

these designated spaces are made.

An extension of application mode has been developed

to facilitate Java Card virtual machine integration.

In systems where application isolation is not needed,

the security mechanism acts as a general protection

unit trapping software errors.

Serial interface

EMTG96-3G offers a unique serial interface compliant

with the ISO 7816-3 specification with several modes

implemented allowing serial connections at 9600 up to

357K bits per second at 3.57MHz. EMTG96-3G

supports T=0 asynchronous half duplex character

transmission protocol, T=1 asynchronous half duplex

block transmission and a proprietary T=14 protocol

used for fast loading of Code into the OTP by the card

manufacturer.

handles

minimum

guard

time

requirements

between

characters

specified

ISO7816-3

specification

automatically.

The

THESEUS

™ family is designed to be compatible with

the ISO7816-3 specification defining the characteristics

of Integrated Circuit Cards commonly referred to as

smart cards.

Random Number Generator

The on chip random number generator is fully Fips140-

1 compliant, providing a rapid stream of truly random

numbers. This allows use of the random numbers

generated beyond just the provision of numbers for

randomising transmissions or generating keys.

Clocks

EMTG96-3G has its own internal oscillator this allows

the core of the device to be independent of the external

clock. The processor can also be clocked much faster

than the IO CLK signal. This ensures the elimination of

fraudulent

attacks

involving

frequency

jitter

and

unequal

mark

space

ratios.

The

internal

clock

generator is connected to the core via a divider that is

under the control of the software. This allows the

Operating System writer to control the trade off

between execution speed and power drawn by the

device. Extending battery life in hand help applications

where slow interfaces are involved.

Anti tampering

EMTG96-3G has extensive anti tampering provision

including the monitoring of the connection to the device

to ensure that deviations beyond a prescribed criteria

result in the device being closed down before its

operating conditions are violated.

On chip voltage regulators

Several on chip regulators isolate the various elements

of the device from variations and fluctuations in the

supply

voltage.

This

allows

elements

characterised precisely, as they operate at one fixed

voltage, which in turn maximises the endurance of the

device.

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