Access control apparatus, access control system, processor, access control method, memory access control apparatus, memory access control system, and memory access control method
US7653861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2006 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1408
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An access control apparatus includes a writer syndrome generator that generates a writer syndrome of writer mask data to mask the parity-added data, the writer syndrome being associated with a writer access ID used when a writer that requests writing of the write data in the memory accesses the memory; a write mask generator that generates the writer mask data based on the writer syndrome, the writer access ID, and a write address in the memory at which the writer writes the write data; a first XOR calculator that obtains first post-operation data by calculating an XOR between the parity-added data and the writer mask data; and a write address converter that converts the write address into another address determined by the writer access ID.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.