Power management system for serial EEPROM device
US5371709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Apr 1, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/143
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Power consumption of a serial EEPROM is reduced while simultaneously precluding data corruption during write operations. These results are achieved by operating a brownout detector in the device to sense EEPROM supply voltage below a predetermined level and thereupon to place the EEPROM in a reduced power mode, but only during an interval that a write sequence is taking place. Such an interval includes loading of data in a temporary storage cache and writing the loaded data into the EEPROM. At the same time that the low voltage level is detected during a write sequence, any load or write operation then in progress is aborted. The brownout detector is intentionally left disabled or in a sleep mode during any read mode or standby mode since there is no jeopardy of corrupting the EEPROM memory during those times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.