USB attach detection for USB 1.1 and USB OTG devices
US7268561B2 · kind B2 · utility
21Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2004 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Dec 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/0042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for detection of a USB host or a USB OTG device being attached to Vbus connector terminal of a USB device includes an attach detection pull down resistor isolated from the Vbus connector terminal. This attach detection feature guarantees USB attach detection and complies with current limits of both USB 1.1 and USB 2.0 OTG specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.