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:
Feb. 06, 2001
Filed:
Aug. 25, 1997
Daniel P. Mann, Austin, TX (US);
Carl K. Wakeland, Scotts Valley, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A processor-based device incorporating a software debug port that utilizes a JTAG or similar standardized interface, thereby providing a software debug communication mechanism that does not require a special bond-out package. In one embodiment of the invention, only standard JTAG pins are used for communications between a host platform and a target system incorporating a target processor. In another embodiment of the invention, the software debug port of the target processor is augmented for higher-speed access via optional sideband signals. When used in conjunction with an on-chip trace cache, the software debug port provides trace information for reconstructing instruction execution flow on the processor and is also capable of examining register contents without halting processor operation. The software debug port alleviates many of the packaging and clock synchronization problems confronting existing debug solutions.