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:
Mar. 17, 2020
Filed:
Jan. 30, 2015
Gigadevice Semiconductor (Beijing) Inc., Beijing, CN;
GIGADEVICE SEMICONDUCTOR (BEIJING) INC., Beijing, CN;
Abstract
An information protection method and device based on a plurality of sub-areas for an MCU chip, the MCU chip comprises an instruction bus, a data bus, a flash controller and a user area of a flash memory, the method comprises: determining a preceding sub-area when the instruction bus accesses the user area; entering corresponding preceding sub-area working state; determining the current sub-area when the instruction bus accesses the user area; when the preceding sub-area is inconsistent with the current sub-area, entering the transition state; determining whether the duration of the transition state reaches the preset waiting time; if yes, entering the corresponding current sub-area working state. The information protection method and device prevent the cooperative companies which develop the program together from stealing program from each other.