Storage subsystem with embedded circuit for protecting against anomalies in power signal from host
US7126857B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2005 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Jan 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage subsystem, such as a flash memory card, includes a voltage detection circuit that monitors the power signal from a host system to detect anomalies. The voltage detection circuit responds to a power signal anomaly by asserting a signal, such as a busy signal on a standard ready/busy signal line, to block the host system from performing write operations to the storage subsystem during presence of the anomaly. The storage system may also include a backup power source, such as a charge pump circuit, a capacitive array, and/or a rechargeable battery, that provides power to a controller of the storage subsystem during the presence of the anomaly, such that the storage system can complete outstanding operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.