Multi port semiconductor memory device with direct access function in shared structure of nonvolatile memory and multi processor system thereof
US8171233B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Oct 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C8/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multiport semiconductor memory device and a multiprocessor system employing the same directly accesses a shared nonvolatile memory. The multiport semiconductor memory device includes a plurality of port units coupled with respective corresponding processors. A shared memory area is accessed by both the processors through the port units. A data path control unit controls a data path between the shared memory area and the port units and data transmission/reception is performed between the processors through the shared memory area. An access authority information storage unit is positioned outside of the memory cell array and stores information for an access authority of nonvolatile memory and provides the information to the processors. Accordingly, a direct access is performed by a processor indirectly connected to nonvolatile memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.