The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2003
Filed:
Sep. 08, 2000
Vincent Berg, Dublin, IE;
Christopher Bleakley, Dublin, IE;
Brian Murray, Dublin, IE;
Jose Rodriguez, Dublin, IE;
Massana Research Limited, Dublin, IE;
Abstract
An address generation unit (AGU) and a digital signal processor (DSP) including such an AGU are disclosed. The AGU ( ) has a register file ( ) providing order (R), stage (S), and displacement (N) values to a digital addressing unit (DAU) ( ) for performing one of eight addressing operations. The register file provides an input (X) to the DAU and receives an output (Y) from the DAU. Within the DAU ( ), selection multiplexers ( ) select full adder outputs to provide Y, or bit-select from adders and the input (X) to provide Y. For a radix- operation, most significant bits (MSBs) are taken from the input (X), middle bits are taken from the output of a first adder (adder ), and the least significant bits (LSBs) are taken from the output of a second adder (adder ) if there is a carry out from the first adder. The AGU may also include bit reverse blocks connected at both the input and output of an adder. The DSP includes a program control unit for delivering a control signal to the AGU for selection of a required addressing operation.