Low Power Asynchronous DSP for Digital Mobile Phones

M.Lewis, L.Brackenbury

Abstract

The CADRE digital signal processor (DSP) architecture is presented. This DSP is intended for use in digital mobile phones and, in this application, it is necessary to balance the requirement of high processing throughput with the demand of low power for extended battery lifetime. These requirements are addressed by a multi-level power reduction strategy,involving the use of a parallel asynchronous architecture, a configurable compressed instruction set, a large register file, the use of sign-magnitude arithmetic, and reduced support for interrupts.

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