Detection system for detecting button being pressed and method thereof
US8959258B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 2, 2014 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/3854
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method for detecting presses on buttons of an electronic device with a reduced number of General Purpose In/Out (GPI/O) ports includes a number of the GPI/O ports The number of the buttons is greater than the number of the GPI/O ports. A proportion of the buttons are each coupled between one of the I/O ports and ground, and the remaining proportion of the buttons are each coupled between any two of the I/O ports. The GPI/O ports are set to work in a first working state or in a second state to provide a first signal or second signal respectively. When a signal provided by a GPI/O port working at the first working mode changes, the method determines which one of the buttons has been pressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.