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High-performance VLSI microprocessors are becoming very power hungry;
this presents an increasing problem of heat removal in desk-top machines and
of battery life in portable machines. Asynchronous operation is proposed as a
route to more energy efficient computing. In his 1988 Turing Award Lecture,
Ivan Sutherland proposed a modular approach to asynchronous design based
on “Micropipelines”. The AMULET group at Manchester University has
developed an asynchronous implementation of the ARM microprocessor based
on micropipelines as part of a broad investigation into low power techniques.
The design is described in detail, the rationale for the work is presented and the
characteristics of the chip described. The first silicon from the design arrived in
April 1994 and an evaluation of it is presented here. |
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