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:
Dec. 23, 2003
Filed:
Jul. 28, 1999
Applicant:
Inventor:
Shohei Maeda, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/05 ;
U.S. Cl.
CPC ...
H02H 3/05 ;
Abstract
In a microprocessor having a debug module and a JTAG unit based on the JTAG standards, there is provided a vector switching circuit in the CPU core which can switch a debug interruption vector address to a user space or to a system space. This vector switching circuit switches a debug interruption vector address depending upon the state of a debug module specified by a command inputted from external hardware such as an emulator via the JTAG interface. A user program can easily be debugged by allocating the debug program in the user space even if hardware such as an emulator is not connected to the microprocessor.