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:
Aug. 26, 2003
Filed:
Oct. 06, 1999
Applicant:
Inventor:
Yu-Chuan Chang, Taipei, TW;
Assignee:
Inventec Corporation, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/100 ; G01R 3/128 ; G09G 1/28 ;
U.S. Cl.
CPC ...
G06F 1/100 ; G01R 3/128 ; G09G 1/28 ;
Abstract
A method of testing a plurality of registers in a RAMDAC, each of the registers having a plurality of bits. First, the bits of the registers are all reset to a first logic state. Then, one logic pattern is written to the registers so as to convert one bit of one of the registers into a second logic state and immediately read out. If the read logic pattern differs from the written logic pattern, an error message will be prompted. The steps are repeated until the testing of each of the bits of the registers is completed.