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ST23YR08：ST23 Dual Interface Secure Microcontroller with 8 KBytes of EEPROM, enhanced security and Nescrypt cryptoprocessor

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.

Key Features

• Hardware featuresEnhanced 8/16-bit ST23 CPU core with 16 Mbytes linear addressable memory230 Kbytes of User ROM4 Kbytes of User RAM2 Kbytes of NESCRYPT RAM8 Kbytes of User EEPROM including 128 bytes of User OTP area:30-year data retention at 25° C500,000 Erase/Write cycles endurance typical at 25° C1 to 64 bytes Erase or Program in 2 msEnhanced NESCRYPT crypto-processor for public key cryptographyHardware security enhanced DES acceleratorThree 8-bit timers with watchdog and interrupt capability3 V and 5 V supply voltage rangesExternal clock frequency up to 10 MHzHigh performance provided by:CPU clock frequency up to 29 MHzAdjustable clocks for better granularityPower-saving Standby stateContact assignment compatible with ISO/IEC 7816-3 standardsAsynchronous 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
• Security featuresActive shieldMonitoring of environmental parametersProtection mechanisms against faultsAIS-31 class P2 compliant true random number generator (TRNG)ISO 3309 CRC calculation blockMemory protection unit (MPU)Unique serial number on each die
• Contactless featuresComplies with ISO/IEC 14443 type B, Innovatron (type B’) and PayPass™ standards13.56 MHz carrier frequencyRF frame up to 512 bytesRFUART (RF universal asynchronous receiver transmitter) up to 848 Kbits/s0.5 Kbytes dedicated RFUART RAMBPSK - NRZ load modulation (card-to-reader)8 to 14% amplitude modulation reception (reader to card) as minimum rangeEnhanced RF performance provided by CPU clock frequency up to 29 MHz coupled with clock frequency divider
• 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

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