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:
Oct. 19, 1999
Filed:
Sep. 11, 1997
Claude Moughani, Austin, TX (US);
William C Moyer, Dripping Springs, TX (US);
Taimur Aslam, Austin, TX (US);
Motorola Inc., Austin, TX (US);
Abstract
A data processing system (10) having an access protect unit (20) for tracing memory accesses. A trace bit (50) is associated with each page of memory and when set generates an interrupt signal on a first valid access to the page. The access protect unit (20) supports trace in both supervisor and user mode without the need for an emulation system or an on-chip emulator. Tracing is done without providing 'backdoor' access to the central processing unit (CPU). The access protect unit (20) allows programmable memory segment tracing. Signature monitoring of memory accesses is accomplished by storing sequential memory segments in a plurality of registers.