I/O cell configuration for multiple I/O standards
US6271679A · kind A · utility
86Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2000 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Mar 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018585
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Circuitry is provided to individually configure each I/O of an integrated circuit to be compatible with a different LVTTL I/O standards. This can be done with only one I/O supply voltage, where that voltage is the highest of the I/O voltages needed in a particular application. The circuitry operates by regulating the output voltage of the I/O cell so that it is above the VOH and below the maximum VIH for the LVTTL standard for which it will comply with. Since each I/O cell is individually configurable, any I/O can drive out to any LVTTL specification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.