Copyright

© 2005, EM Microelectronic-Marin SA

2

www.emmicroelectronic.com

Theseus

EMTG30

Introduction

EMTG30 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 of the family of devices makes them particularly

suitable in electronic commerce and sensitive data

areas. This is accomplished in hardware, with not only

protection against out of parameter operation of 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.

General Purpose Non Volatile Memory (GPNVM)

The General Purpose Non Volatile Memory offers ultra

low cost implementation of traditional EEPROM based

smart card ICs using one unique memory instance for

code and data storage. This one memory solution

provides compact implementation offering at the same

time a maximum flexibility. Therefore all code size

footprint reduction will directly benefits to the application.

A simple and secure memory protection mechanism is

relying on a flexible border between code and data

space.

With up to a 30KB GPNVM on chip memories EMTG30

eradicates the need for memory bank switching either

for data and code space.

The organisation of GPNVM in 128 bytes per pages

combined with efficient page management methods are

increasing application level performances such as:

-

High performances memory update

-

High resistance to page tearing

-

Extension of application level effective page cycling

endurance

-

Simple implementation of anti-tearing mechanism

An additional GPNVM system area of 1KB is available.

This system area hosts device systems parameters.

The remaining area could be used for several purposes

such boot loader commands extension, GPNVM update

backup buffer, hardware API functions etc…

This means that reel User’s available memory is actually

larger than 30KB.

Serial interface

EMTG30 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. EMTG30 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.

It

handles

minimum

guard

time

requirements between characters specified by ISO7816-

3 specification automatically. EMTG30 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 Fips140-2

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

EMTG30 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

The EMTG30 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 to be characterised

precisely, as they operate at one fixed voltage, which in

turn maximises the endurance of the device.

Technology

This product is using superior Flash memory SuperFlash

Technology licensed from SST and SuperFlash is a

registered trademark of SST (Silicon Storage

Technology Inc.).