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:
Dec. 31, 2002
Filed:
Sep. 17, 1999
Applicant:
Inventors:
Craig MacKenna, Los Gatos, CA (US);
Gyle Yearsley, Boise, ID (US);
Assignee:
ZiLOG, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/576 ; G06F 1/208 ; G06F 1/316 ;
U.S. Cl.
CPC ...
G06F 1/576 ; G06F 1/208 ; G06F 1/316 ;
Abstract
A controller for executing instructions has one the order of five addressing modes and can allow executing of processes concurrently in multiple modes. A specific embodiment can effectively run legacy code written for the Z80 micoprocessor without requiring recompiling of code. An optional embodiment includes autonomous Multiply/Accumulator Engine (MAC) optimized to perform sum-of-products (SOP) operations with little controller overhead, making the invention capable of more effectively handling a number of processing tasks, particularly tasks related to digital signal processing (DSP).