ST19WG18 Datasheet, PDF (2/3 Pages) STMicroelectronics – Smartcard MCU With 18, 34, 66 Kbytes High Density EEPROM

ST19WG18, ST19WG34, ST19WG66
HARDWARE DESCRIPTION
The product, member of the ST19W platform, is a
serial access microcontroller specially designed
for cost effective secure portable applications.
It is manufactured using an advanced highly reli-
able ST CMOS EEPROM technology.
It is based on the STMicroelectronics 8 bit CPU al-
ready implemented on the ST19X product family
and includes on-chip memories: User ROM, User
RAM and EEPROM with state of the art security
features. ROM, RAM and EEPROM memories can
be configured into partitions with customized ac-
cess rules.
An additional ST ROM contains all ST provided
functions and libraries.
Access from any memory area to another are pro-
tected by hardware FIREWALLS. Access rules are
User defined and can be selected by mask options
or during the life of the product.
The chip includes a DES accelerator which is ac-
cessible via cryptographic software libraries locat-
ed in ST ROM.
As with all the other ST19W products, a serial in-
terface fully compatible with the ISO7816 standard
for Smartcard applications is available.
A CRC calculation block is also available and is di-
rectly accessible by the User.
Figure 2. Block Diagram
RAM
EEPROM
USER ROM
ST ROM and
DES LIBRARY
DES
ACCELE-
RATOR
MEMORY ACCESS FIREWALL
INTERNAL BUS
ST ROM and
DES FIREWALL
CRC
MODULE
CLOCK
GENE-
RATOR
MODULE
3X
8 BIT
TIMERS
SECU-
RITY
ADMIN.
GUN A
&
GUN B
8 BIT
CPU
1 SERIAL
INTER-
FACE
CLK
RESET
Vcc
GND
I/O
SOFTWARE DEVELOPMENT
Software development and firmware generation
(ROM and options) are supported by a compre-
hensive set of development tools, dedicated at de-
velopment and validation of softwares:
399
– Smartcard ICs Emulator,
– ST19X simulation package,
– ScDevTools pack environment for all
Windows^TM based stations,
– Powerful C/C++ compiler and debugger are
also available (third party tools).
2/3