ST21Y144 is a smartcard MCU with 144 Kbytes high density EEPROM. Its major applications include mobile communications (GSM and CDMA) and Java applications. Hardware features include enhanced 8/16-bit CPU core, 16 MBytes linear addressable memory, 400 Kbytes user ROM, 8 Kbytes user RAM, and 144 Kbytes user EEPROM.