ST22N256| Datasheet

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ST22N256 ST22N256-A
Smartcard 32-Bit RISC MCU with 256 Kbytes EEPROM Java CardTM HW Execution & Cryptographic Library
Data Brief

Features
ST22N256(-A) applications include:

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High-end USIM Multi-application Java CardTM

Hardware features

32-bit RISC CPU 24-bit linear memory addressing Dual instruction set: Native/Java CardTM 374 (N256), 394 (N256-A) KBytes User ROM 16 KBytes User RAM 256 KBytes User EEPROM Error Correction Code within 32-bit word 10-year data retention 500,000 Erase/Write cycles endurance 1 to 128 bytes Erase/Program in 2 ms (typ.) Asynchronous Serial Interface (ASI) 2 serial I/O ports compatible ISO 7816-3 T=0 and T=1 2 configurable 12-bit and 16-bit timers Interrupt controller with up to 16 lines 1.62 V to 5.5 V supply voltage External clock from 1 MHz to 10 MHz

Micromodule

Wafer

Software features

Hardware Abstraction Layer (HAL) available as a C-oriented API Cryptographic library including: Asymmetrical algorithms (ST22N256): RSA signature/verification, Prime number generation (up to 1024 bits) and RSA key generation (up to 2048 bits) SHA-1 Hash function (ST22N256) Symmetrical algorithms: DES, Triple DES and AES

Typical internal frequency up to 33 MHz Security EEPROM Flash programming mode Clock and power management Voltage and clock frequency sensors Highest security certification: CC EAL5+ Contact assignment ISO 7816-2 compatible

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Security features
CPU security instructions dedicated to: DES and Triple DES Modular arithmetic and elliptic curve CRC calculation (16-bit ISO 3309) Advanced Memory Protection Unit Application firewalling and access control Domain switching securely controlled Native/Java, Code/Data memory attributes Supervisor and User modes True Random Number Generator (AIS31 compliant) Unique serial number on each die

June 2006

Rev 2

1/9
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