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. 10, 2004
Filed:
Dec. 28, 2001
Timothe Litt, Southborough, MA (US);
Richard E. Kessler, Shrewsbury, MA (US);
Thomas Hummel, Marlborough, MA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A system is disclosed in which an on-chip logic analyzer (OCLA) includes a loop detector logic which receives incoming program counter (PC) data and detects when software loops exist. When a software loop is detected, the loop detector may be configured to store the first loop in memory, while all subsequent iterations are not stored, thus saving space in memory which would otherwise be consumed. The loop detector comprises a content addressable memory (CAM) which is enabled by a user programmed signal. The CAM may be configured with a programmable mask to determine which bits of the incoming PC data to compare with the CAM entries. The depth of the CAM also is programmable, to permit the CAM to be adjusted to cover the number of instructions in a loop.