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:
Sep. 28, 1999
Filed:
Jan. 09, 1998
Theo J Powell, Dallas, TX (US);
Kuong Hua Hii, Singapore, SG;
Danny R Cline, Plano, TX (US);
Wah Kit Loh, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A read-only memory (ROM) embedded mask release number for a built-in self-test of a memory device is provided. A synchronous dynamic random access memory (10) comprises a conventional memory (12) and a built-in self-test arrangement (14). The built-in self-test arrangement (14) includes a read only memory (ROM) (72) which stores a plurality of algorithms. Each algorithm is comprised of a series of array access instructions (140) and program access instructions (142). The last instruction in ROM (72) is an idle instruction (120). Associated with idle instruction (120) is an identification number (132). Once stored in ROM (72), the identification number (132) can be read without the use of additional equipment.