Abstract
We have designed a microprocessor that is based on a single instruction multiple data stream (SIMD) architecture. It features a two-way superscalar architecture for multimedia embedded systems that need to support especially MPEG2 video decoding/encoding and 3DCG image processing. This microprocessor meets all requirements of embedded systems, including (a) MPEG2 (MP@ML) decoding and graphic processing capabilities for three-dimensional images, (b) programming flexibility, and (c) low power consumption and low manufacturing cost. High performance was achieved by enhanced parallel processing capabilities while adopting a SIMD architecture and a two-way superscalar architecture. Programming flexibility was increased by providing 170 dedicated multimedia instructions. Low power consumption was achieved by utilizing advanced process technology and power-saving circuits. The processor supports a general-purpose RISC instruction set. This feature is important, as the processor will have to work as a controller of various target systems. The processor has been fabricated by 0.21-/spl mu/m CMOS four-metal technology on a 9.84/spl times/10.12 mm die. It performs 2.16 GOPS/720 MFLOPS at an operating frequency of 180 MHz, with a power consumption of 1.2 W and a power supply of 1.8 V.
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