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:
Apr. 28, 2009
Filed:
Jun. 29, 2006
Robert Yin, Castro Valley, CA (US);
Robert Yin, Castro Valley, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
All the address lines in a data processing system can be tested by using one or more small memory device that do not occupy the full addressing capability of the address lines. In one embodiment, some of the address inputs of the memory device is connected to different address lines at different times. Instructions are pre-loaded into some locations of the memory device such that the address lines has to be asserted to fetch the instructions for execution. By executing the instructions and appropriately connecting the address lines to the address input, all the address lines can be tested. In another embodiment, some of the locations are pre-loaded with a set of predetermined values. A program then writes another set of predetermined values to associated locations. By reading the values in the locations and compared with the sets of predetermined values, it is possible to determine if the address lines are functioning properly.