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:
Jul. 22, 2003
Filed:
Oct. 03, 2001
Michael John Williams, Cambridge, GB;
Andrew John Merritt, Cambridge, GB;
Arm Limited, Cambridge, GB;
Abstract
A processing system is described including a processor unit and a memory Diagnostic hardware within the processing system includes a shadow PC register that stores a shadow program counter value following the true program counter value held within a program counter register of the processor unit The diagnostic hardware is responsive to a program counter request signal from an external diagnostic system to transfer a program counter value into a scan chain from where it can be returned to the diagnostic system The operation of the processor unit is independent of any of the diagnostic operations and so true real time operation of the system may be observed and de-bugged.