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Features
SO8 Narrow
ST23YT34 major applications include:
■ Secure Internet/computer applications
Hardware features
■ Enhanced 8/16-bit ST23 CPU core with 16
Mbytes linear addressable memory
■ 110 Kbytes User ROM
■ 5 Kbytes User RAM
■ 2 Kbytes NESCRYPT RAM
■ 34 Kbytes User EEPROM including 128 Bytes
User OTP area:
– Highly reliable CMOS EEPROM submicron
technology
– 10-year data retention
– 500,000 Erase/Write cycles endurance
typical at 25° C
– 1 to 64 Bytes Erase or Program in 1.5 ms
■ Enhanced NESCRYPT crypto-processor for
public key cryptography
■ Three 8-bit timers with watchdog and interrupt
capability
■ 3V to 5.25V supply voltage range
■ 0 to 70 °C operating range in USB mode
■ High performance provided by:
– CPU clock frequency up to 29 MHz
■ Power-saving Standby state
■ Asynchronous Receiver Transmitter (IART) for
high speed serial data support (ISO 7816-3
and EMV™ compliant)
ST23YT34
Smartcard MCU
with USB and 34 KBytes EEPROM
Data Brief
■ Full-speed USB 2.0 interface
– 5 Endpoints
– 16 bytes bidirectional EP0
– 2x64 bytes In/Out Bulk for CCID
compliance
– 2x16 bytes for INT transfer
– Clock Recovery
■ 3 GPIO pins
– 2 bidirectional input/output pins
– 1 unidirectional input pin
■ ESD protection greater than 5 kV (HBM)
Security features
■ Active shield
■ Monitoring of environmental parameters
■ Protection mechanisms against faults
■ Hardware Security Enhanced DES accelerator
■ AIS-31 class P2 compliant True Random
Number Generator (TRNG)
■ ISO 3309 CRC calculation block
■ Memory Protection Unit (MPU)
■ Unique serial number on each die
Development environment
Software development and firmware generation
are supported by a comprehensive set of
development tools dedicated to software design
and validation:
■ C Compiler
■ Emulator
October 2008 Rev 1 1/5
For further information contact your local STMicroelectronics sales office.
www.st.com
1
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Description ST23YT34
1 Description
The ST23YT34 product is a serial access microcontroller specially designed for secure
smartcard applications.
It is based on an enhanced STMicroelectronics 8/16-bit CPU core offering 16 Mbytes linear
addressing space. It is manufactured using an advanced highly reliable ST CMOS EEPROM
technology.
The ST23YT34 is a secure USB microcontroller based on the ST23 core architecture. Its
high security level and versatile communication interfaces address user identification
functions for computer or network access or for computer-based local or remote
applications.
The ST23YT34 features a USB full-speed interface for communication with computers as
well as various I/Os.
Moreover, an ISO 7816-3 EMV-compliant Asynchronous Receiver Transmitter (IART)
communication peripheral is available.
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK
packages. ECOPACK
®
packages are lead-free. The category of second Level Interconnect
is marked on the package and on the inner box label, in compliance with JEDEC Standard
JESD97. The maximum ratings related to soldering conditions are also marked on the inner
box label.
®
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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ST23YT34 Description
Ai15222
Internal Bus
IART
8/16-bit
CPU
Core
3 x
8-bit
timers
CRC
Module
Clock
Gene-
rator
Module
True
Random
Number
Gene-
rator
RAM
ST ROM
(Boot
software)
Security
Monitor-
ing and
Control
EEPROM
EDES
Accelerator
User
ROM
ST ROM
Firewall
Full-
speed
USB
NES-
CRYPT
MPU
General-
purpose
I/Os
Multiplexed I/Os
DATA
CLK
RESET
I/Os
NES-
CRYPT
RAM
Figure 1. ST23YT34 block diagram
1.1 Development environment
Development tools for smartcard products include a complete range of hardware systems
and software tools from STMicroelectronics and third-party tool suppliers. The range of tools
includes solutions to help you to develop and debug your application and evaluate
smartcard products and their peripherals.
An Integrated Development Environment (IDE), the STMicroelectronics Visual Debug
(STVD), provides a set of tools for developing embedded applications. This interface
manages the project configuration, code edition, code generation and program debugging.
A Smartcard ICS emulator (SCICS) is available for developing and validating your
application code.
All the information needed to generate the application code and personalization will be
collected in a delivery file (.DLV extension). This file is created using the Delivery menu of
the STMicroelectronics configuration software tool, SCOOL.
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Revision history ST23YT34
2 Revision history
Table 1. Document revision history
Date Revision Changes
24-Oct-2008 1 First release.
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ST23YT34
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