Multi-time programmable semiconductor memory device and multi-time programming method therefor
US7227802B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Dec 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C17/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multi-time programmable semiconductor memory device includes a unit array, a unit decoder and a cell distribution circuit. The unit array includes a plurality of programmable units, each of which has a plurality of one-time programmable cells. The unit decoder generates a unit select signal for selecting a programmable unit of the unit array based on an address signal. The cell distribution circuit generates an odd-numbered cell programming signal for programming one of odd-numbered one-time programmable cells of the plurality of the one-time programming cells of the programmable unit that is selected by the unit select signal, and an even-numbered cell programming signal for programming one of even-numbered one-time programmable cells of the plurality of the one-time programming cells, based on previous data state of the selected programmable unit received from the unit array, and present data state to be programmed to the selected programmable unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.