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.

Date of Patent:
Dec. 09, 2008

Filed:

Dec. 05, 2003
Applicants:

Gary L. Swoboda, Sugar Land, TX (US);

Bryan Thome, Missouri City, TX (US);

Inventors:

Gary L. Swoboda, Sugar Land, TX (US);

Bryan Thome, Missouri City, TX (US);

Assignee:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J 3/06 (2006.01); G01R 31/28 (2006.01);
U.S. Cl.
CPC ...
Abstract

In a test and debug system, a plurality of trace streams, including a timing trace stream, are transmitted from the target processing unit to the host processing unit for analysis. The timing trace stream, the trace stream that indicates activity or non-activity of the program counter each clock cycle, can occupy a large percentage of the bandwidth of the transmitted data. The transmitted data is organized into groups of packets, each packet having a control signal portion and a payload portion. Each information packet has a logic signal stored at each location indicating an activity or a non-activity of the program counter. By identifying portion of the timing trace stream wherein the activity or non-activity does not change for one or more groups of timing packets, the information in a plurality of packets can be represented by a header and an information packet that describes a number of packets in which the activity or non-activity of the program counter does not change.


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