Enable power from an accessory to a host device based on whether the accessory is able to alter an electrical characteristic of the power path
US9274578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2012 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Sep 8, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods, systems, and apparatus for enabling a power path between a power source and a host device via an accessory. A host device may send, to an accessory arranged within the power path, via a first data pin arranged in the host device, a request for an accessory identifier. The accessory identifier identifies the accessory. The host device may then determine whether the accessory identifier is received from the accessory within a specified period of time or whether a received accessory identifier is valid. If the accessory identifier is not received from the accessory within the specified period of time, or a received accessory identifier is not valid, the host device sends a new request for the accessory identifier to the accessory via a second data pin different than the first data pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.