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. 16, 2002
Filed:
Jul. 28, 1998
Fumiaki Yamashita, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An integrated circuit device sending trace data generated by a central processing unit (CPU) to a debug device without loss and a method of controlling the operation of the integrated circuit device. The integrated circuit device has the CPU executing various types of data processing. A trace buffer is connected via a parallel bus to a predetermined output terminal of the CPU. A buffer monitoring circuit is connected to an input terminal of the trace buffer and to a predetermined control terminal of the CPU. The CPU executes various types of data processing requested by a program and outputs trace data indicating an execution history. The trace buffer temporarily stores the trace data that is output in parallel by the CPU. When a usage amount of the trace buffer exceeds a preset threshold, the buffer monitoring circuit sends an interrupt signal BRKINT to the CPU to suspend the data processing of the CPU and, when a preset period of time elapses, releases the suspension of data processing of the CPU.