Method and device of information protection for micro control unit chip
US10102155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2015 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Mar 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2141
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The disclosure discloses a method and a device of information protection for a micro control unit (MCU) chip, the MCU chip comprises an instruction bus, a data bus, a flash controller and a user area of a flash memory; the flash controller is used to divide the user area into a first sub-area and a second sub-area; the method comprising: when the instruction bus accesses the user area, determining, whether the instruction bus accesses the first sub-area; if yes, entering the first sub-area working state; in the first sub-area working state, if the instruction bus accesses the second sub-area, entering the transition state; determining whether the time at transition state reaches a preset waiting time; if yes, entering the second sub-area working state; the disclosure is used to protect program from being stolen by users and prevent the cooperative companies stealing program from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.