Data processing system and method for reading instruction data of instruction from memory including a comparison stage for preventing execution of wrong instruction data
US11507282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2020 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Jan 27, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1407
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In the disclosure, a data processing system includes a microprocessor and a memory. The integrity of data read from a memory by a microprocessor may be checked. When an instruction address is transmitted from the microprocessor to the memory for reading the instruction data corresponding to the instruction address, predetermined dummy data is also read from the memory while the instruction data is read. The integrity of the instruction data may be check by comparing the predetermined dummy data to a hardwire data that is not stored in the memory. If the dummy data matches the hardwire data, the instruction data read from the memory is determined to be correct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.