ST ST23YT34 User Manual

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

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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