with USB and SPI interfaces and 66 KBytes EEPROM
TSSOP20
(6.4 x 6.2 mm)
Features
Hardware features
■ Enhanced 8/16-bit ST23 CPU core with
16 Mbytes linear addressable memory
■ 210 Kbytes of User ROM
■ 6.2 Kbytes of User RAM
■ 2 Kbytes of NESCRYPT RAM
■ 66 Kbytes of User EEPROM including 128
bytes of User OTP area:
– Highly reliable CMOS EEPROM submicron
technology
– 30-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
■ Hardware security enhanced DES accelerator
■ Three 8-bit timers with watchdog and interrupt
capability
■ 3V to 5.5V supply voltage range
■ 0 to 70 °C operating range
■ High performance provided by:
– CPU clock frequency up to 29 MHz
■ Power-saving Standby state
■ 10-MHz Master Serial Peripheral Interface
(SPI) bus
■ USB hardware accelerator for AutoPlay
■ 12 GPIO pins
– 7 bidirectional input/output pins
– 5 unidirectional input pins
ST23YT66
Smartcard MCU
Data brief
■ Full-speed USB 2.0 interface
– 8 Endpoints
– 2 x 16 bytes (EP0)
– 2 x 16 bytes for INT transfer (EP1)
– 2x64 bytes for In/Out Bulk and INT transfer
(EP2)
– 2x64 bytes for In/Out Bulk and INT transfer
(with hardware accelerator) (EP3)
– Clock recovery
■ ESD protection greater than 5 kV (HBM) for all
pads and 2 kV for XIN and XOUT pads
Security features
■ Active shield
■ Monitoring of environmental parameters
■ Protection mechanisms against faults
■ 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 and emulator
Applications
December 2010 Doc ID 15120 Rev 2 1/5
ST23YT66 major applications include:
■ Pay TV applications
■ Secure Internet/computer applications
www.st.com
1
ST23YT66 Description
1 Description
The ST23YT66 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 ST23YT66 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 ST23YT66 features a USB full-speed interface for communication with computers as
well as various I/Os and an SPI bus for user interfaces (keyboards, displays, etc.).
The ST23YT66 USB hardware accelerator provides a very efficient AutoPlay mode
implementation. This enables the content of a companion serial Flash memory to be
uploaded to a computer at a speed close to USB bandwidth.
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.
Doc ID 15120 Rev 2 2/5
Description ST23YT66
Ai12588
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
SPI
Multiplexed pins
NES-
CRYPT
RAM
Analog
transceivers
Figure 1. ST23YT66 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 ST Visual Develop (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.
3/5 Doc ID 15120 Rev 2
ST23YT66 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
24-Oct-2008 1 First release.
17-Dec-2010 2 Removed “Obsolete” watermark.
Doc ID 15120 Rev 2 4/5
ST23YT66
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5/5 Doc ID 15120 Rev 2
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