USB attach detection for USB 1.1 and USB OTG devices

Details USB attach detection for USB 1.1 and USB OTG devices USB attach detection for USB 1.1 and USB OTG devices

2007-09-11

2007-09-11

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C710S015000

Reexamination Certificate

active

10945465

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.

REFERENCES:
patent: 5912569 (1999-06-01), Alleven
patent: 6351809 (2002-02-01), St. Pierre et al.

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