One-chip microcomputer
US6418055B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1999 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Dec 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a one-chip microcomputer that incorporates a nonvolatile memory in which data can be electrically erased and data can be written and read, as a program memory, a reference nonvolatile memory group 40 which is lower in characteristic than a nonvolatile memory 7 in a memory cell array is disposed, and, on the basis of a result of reference of the reference nonvolatile memory group 40, the erase voltage of an erasing operation which is previously stored in a specific address region of the nonvolatile memory 7 is changed by a control circuit 44. On the basis of a result of reference of the reference nonvolatile memory group 40, the reference level of a reading operation of a sense amplifier which is previously stored in a specific address region of the nonvolatile memory 7 is changed by the control circuit 44.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.