Memory card control device
US5450365A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | May 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a memory card control device for interfacing an electronic still camera or similar electronic equipment and a memory card removably mounted on the equipment, a data processing device operates only at a supply voltage of 5 volts while a logic circuit operates at a supply voltage of 3 volts. A first level shifter converts the level of signals output from the memory card to a level matching the logic circuit. A second level shifter converts the level of signals output from the logic circuit to 5 volts and transfers it to the processing device, while converting the level of signals output from the processing device to 3 volts and feeding it to the logic circuit. The control device accommodates various kinds of memory cards each having a particular rated supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.