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:
Jan. 15, 2002
Filed:
Aug. 14, 1998
Eugene Feng, San Jose, CA (US);
Gary Phillips, San Jose, CA (US);
Silicon Storage Technology, Inc., Sunnyvale, CA (US);
Abstract
A microcontroller system has a first and a second block of non-volatile programmable memory and includes a program memory space allocation circuitry. In a first mode of operation, the first and second blocks of programmable memory are prevented from being written by commands external to the microcontroller system. In a second mode, however, the first and second blocks of programmable memory are prevented from being written by commands external to the microcontroller system but the second block of programmable memory can be written based upon execution of commands stored in the first block of programmable memory. By having circuitry to so allocate the programmable memories, the security of the programmable memories is enhanced.