ST ST23YR08 User Manual
ST23YR08
259a.ai
Micromodule Wafer
Dual contactless smartcard MCU with 8 Kbytes EEPROM,
enhanced security, cryptoprocessor and optimized RF performance
Features
Hardware features
■ Enhanced 8/16-bit ST23 CPU core with
16 Mbytes linear addressable memory
■ 230 Kbytes of User ROM
■ 4 Kbytes of User RAM
■ 2 Kbytes of NESCRYPT RAM
■ 8 Kbytes of User EEPROM including 128 bytes
of User OTP area:
– 30-year data retention at 25° C
– 500,000 Erase/Write cycles endurance
typical at 25° C
– 1 to 64 bytes Erase or Program in 2 ms
■ Enhanced NESCRYPT crypto-processor for
public key cryptography
■ Hardware security enhanced DES accelerator
■ Three 8-bit timers with watchdog and interrupt
capability
■ 3 V and 5 V supply voltage ranges
■ External clock frequency up to 10 MHz
■ High performance provided by:
– CPU clock frequency up to 29 MHz
■ Adjustable clocks for better granularity
■ Power-saving Standby state
■ Contact assignment compatible with
ISO/IEC 7816-3 standards
■ Asynchronous receiver transmitter (IART) for
high speed serial data support
(ISO/IEC 7816-3 and EMV™ compliant)
■ ESD protection greater then 6 kV (HBM) for
contact pads and 4 kV for contactless pads
Contactless features
■ Complies with ISO/IEC 14443 type B,
Innovatron (type B’) and PayPass™ standards
■ 13.56 MHz carrier frequency
■ RF frame up to 512 bytes
■ RFUART (RF universal asynchronous receiver
transmitter) up to 848 Kbits/s
■ 0.5 Kbytes dedicated RFUART RAM
■ BPSK - NRZ load modulation (card-to-reader)
■ 8 to 14% amplitude modulation reception
(reader to card) as minimum range
■ Enhanced RF performance provided by CPU
clock frequency up to 29 MHz coupled with
clock frequency divider
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
Interface with RF readers supported through a
library of embedded software functions
compatible with ISO/IEC 14443 standards.
Software development and firmware generation
are supported by a comprehensive set of
development tools dedicated to software design
and validation:
■ C compiler, simulator and emulator
Applications
ST23YR08 major applications include:
■ EMVCo banking, ID and transport
Data brief
March 2010 Doc ID 17253 Rev 1 1/4
www.st.com
1
ST23YR08 Description
Ai15204
Internal Bus
2 I/Os
IART
GND
8/16-bit
CPU
Core
3 x
8-bit
Timers
CRC
Module
CLK
Clock
Gene-
rator
Module
Vcc
True
Random
Number
Gene-
rator
RAM
ST ROM
(Boot software)
Security
Monitor-
ing and
Control
RESET
EEPROM
EDES
Accelerator
User
ROM
ST ROM Firewall
NESCRYPT
NESCRYPT RAM
MPU
RF UART
RF
Inter-
face
AC0 AC1
RF UART
RAM
1 Description
The ST23YR08 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.
An RF Interface including an RF universal asynchronous receiver transmitter (RF UART)
enables contactless communication up to 848 Kbits/s compatible with the ISO 14443-B
standard and also enables Innovatron (type B’) communication.
Moreover, an ISO 7816-3 EMV-compliant asynchronous receiver transmitter (IART)
communication peripheral is available.
Figure 1. ST23YR08 block diagram
Doc ID 17253 Rev 1 2/4
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