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:
Jun. 11, 2002
Filed:
May. 30, 1996
Applicant:
Inventor:
Simon Anthony Segars, Cambridge, GB;
Assignee:
Advanced Risc Machines Limited, Cambridge, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/12 ;
U.S. Cl.
CPC ...
G06F 1/12 ;
Abstract
A data processing apparatus comprising an integrated circuit having a processor core surrounded by a scan chain is described. The processor core can execute program instructions using either a system clock signal MClk or a test clock signal DClk. A clock selecting bit S within the program instructions for test operation indicates which clock is to be used and a clock selecting mechanism selects the indicated clock signal and passes this to the processor core When the system clock MClk is selected execution of the program instruction by the processor core may be coordinated with the operation of connected auxiliary circuits such as a DRAM