ST22L096

The ST22Lxxx is a member of the SmartJ™ platform using a 32-bit Reduced Instruction Set Computer (RISC) core to execute both Native RISC instructions and JavaCard™ 2.x Technology instruction (byte codes) directly(See Figure 2. "SmartJ™ Platform EEPROM Architecture", on page 3).

Direct JavaCard™ byte code execution provides high performance advantage over processors that emulate the JavaCard™ byte code instruction set. The product features a 24-bit wide linear addressing capability and includes User ROM, User RAM, and User EEPROM.

Memory and Peripheral accesses are controlled by a Memory Protection Unit that allows to implement firewalls between applications.

Memories are accessed via two different buses, allowing simultaneous accesses to code and data. Memory load and stores can be performed at byte, short (2-bytes), or word (4-bytes) granularity, with optional pointer auto increment.

The ST22 core includes dedicated instructions to accelerate performances of the following algoriths:
DES and Triple DES
Modular Arithmetic on big numbers,
Characteristic two field arithmetic to support efficiently Elliptic Curves,
CRC 16-bit ISO 3309.

The product has clock and power management, 2 User configurable Timers, a Central Interrupt Controller and a Random Number Generator.