350 MHz time-multiplexed 8-port SRAM and word size variable multiplier for multimedia DSP

Abstract

A multimedia DSP optimized for digital audio/video applications provides simple flexible cost-effective solution capable of GUI acceleration, MPEG2 decoding, real-time MPEG1 encoding, personal video conferencing, 28.8 kbps fax/modem, and audio/sound functions. The main frequency of the chip is 62.5 MHz and the supply voltage is 3.3 V. The chip is fabricated in 0.5 /spl mu/m triple-metal CMOS, occupies 12.8/spl times/14.0 mm/sup 2/ and is mounted in a 240 QFP package with a heat-spreader. The chip integrates high-performance custom macro blocks: an interface for Rambus DRAMs (RAC), a 37 kb time-multiplexed 8-ported SRAM, 72 b scalable datapath and single oxide 3 V/5 V I/O. The focus here is the SRAM and word-size-variable multiplier.