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Toshiba develops configurable processor core
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Toshiba develops configurable processor core
By Yoshiko Hara, EE Times
April 29, 2002 (8:35 p.m. EST)
URL: http://www.eetimes.com/story/OEG20020429S0047
TOKYO — Toshiba Corp. will take the wraps off a configurable processor core that can be customized according to application at the Embedded Processor Forum this week in San Jose, Calif. The company plans to promote the MeP — for "media embedded processor" — as a de facto standard embedded solution for multimedia use.
Toshiba will offer MeP in two forms: as a family of system-on-chip ICs; and as licensable intellectual property (IP). A low-power version is scheduled to hit the market this year. For IP sales, Toshiba said it might recruit third parties to prepare a design environment.
Based on Toshiba's original 32-bit RISC architecture, the MeP core uses 16- and 32-bit variable-length instructions, and has 16 general-purpose registers, as well as a five-stage pipeline.
Depending on the application requirements, the core can be configured using varying instructions, memory configurations, debug support, interrup t controller, timer/counter and bus interface width.
'MeP modules'
Extensions in the form of hardware and software IP can be added to form "MeP modules." Extensions include user custom instructions, a DSP unit, hardware engines and a very long instruction word coprocessor. MeP modules with different functionality, such as video and audio decoders, are linked to a global data bus to form a one-chip system.
Toshiba started MeP architecture work around 2000 and developed an MPEG-2 high-definition decoder last year. Now the MeP engineers are working on a low-power version, called c2, using a 0.13-micron process. MeP-c2's minimum configuration has 46,000 gates, operates at 200 MHz (worst case), and packs a 2-kbyte Level 1 cache and 16 kbytes of data RAM.
Power consumption is 0.11 milliwatt per megahertz, which Toshiba said is about one-third the average power consumption of several 32-bit processors with the same size memory.
More Embedded Processor Forum coverage.
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