DESCRIPTION
The ST16SF42, a member of the standard ST16 device family, is a serial access microcontroller especially designed for high volume and cost competitive Smartcard applications where firmware security algorithm must be implemented.
The ST16SF42 is based on 8 bit CPU core and includes on chip memories: 384 Bytes of RAM, 16 KBytes of USER ROM, 1.5 KByte of SYSTEM ROM, and 2048 Bytes of EEPROM.

■ 8 BIT ARCHITECTURE CPU
■ 16 KBytes of USER ROM, SECTOR COMBINATIVE
■ 1.5 KByte of SYSTEM ROM
■ 384 Bytes of RAM
■ 2048 Bytes of EEPROM, SECTOR COMBINATIVE
   – Highly reliable CMOS EEPROM technology
   – 10 year data retention
   – 300,000 Erase/Write cycle endurance
   – Protected One Time Programmable block (32 or 64 bytes)
   – 1 to 32 bytes block either Erase or Write in single cycle programming
■ EXTENDED VOLTAGE OPERATION
   – VCC Range: 2.7V to 5.5V
■ SERIAL ACCESS, ISO 7816-3 COMPATIBLE
■ POWER SAVING STANDBY MODE
■ UP TO 5 MHz INTERNAL OPERATING FREQUENCY
■ VERY HIGH SECURITY FEATURES INCLUDING EEPROM FLASH ERASE
■ CONTACT ASSIGNMENT COMPATIBLE ISO 7816-2
■ ESD PROTECTION GREATER THAN 5000V
■ MEETS GSM 11.11 AND 11.12 SPECIFICATIONS
■ 2 OPERATING CONFIGURATIONS
   – ISSUER
   – USER