The SH7615 is a CMOS single-chip microcontroller that integrates a high-speed CPU core using an original Renesas architecture with supporting functions required for an Ethernet system.The CPU has a RISC (Reduced Instruction Set Computer) type instruction set. The CPU basically operates at a rate of one instruction per cycle, offering a great improvement in instruction execution speed. the 32-bit internal architecture provides improved data processing power, and DSP functions have also been enhanced with the implementation of extended Harvard architecture DSP data bus functions. With this CPU, it has become possible to assemble low-cost, high-performance/high-functionality systems even for applications such as realtime control, which could not previously be handled by microcontrollers because of their high-speed processing requirements. The SH7615 also includes a maximum 4-kbyte cache, for greater CPU processing power when accessing external memory.