Multifunction input/output circuit
US8217700B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2009 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Aug 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/1732
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one example, a chip includes integrated components configured to operate in the digital domain and the analog domain. An I/O pad located on the chip is configured to provide an external device access to the integrated components. A multifunction I/O interface cell between the I/O pad and the integrated components is configured to selectively connect different combinations of the components to the same I/O pad at different times. The multifunction I/O interface cell may include a first switching device connected to ground, a second switching device connected to a reference voltage, an analog input/output buffer, and a digital input/output buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.