USB device and mode detecting method thereof

Details USB device and mode detecting method thereof USB device and mode detecting method thereof

2011-04-19

2011-04-19

Tsai, Henry W (Department: 2184)

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral monitoring

C710S008000, C710S011000, C710S014000

Reexamination Certificate

active

07930441

ABSTRACT:
A USB peripheral device and a method of determining USB speed mode. The method of determining USB speed mode for an USB peripheral device, wherein the USB peripheral device is coupled to an USB host through an USB transmission cable, and the USB transmission cable comprises power and ground lines for power supply, and first and second data signals for transmitting data, the method comprising the USB peripheral device pulling up voltage level of the first data signal with a first pull-up device, the USB peripheral device pulling up voltage level of the second data signal with a second pull-up device, and the USB host determining a high/full speed mode for the USB peripheral device, when detecting only one of the first and second data signals exceeding a threshold, and then detecting the other data signal exceeding the threshold in a predetermined period.

REFERENCES:
patent: 6415342 (2002-07-01), Wahl et al.
patent: 2005/0144345 (2005-06-01), Nakano
patent: 2005/0188142 (2005-08-01), Nakajima
patent: 2005/0228934 (2005-10-01), Tsutsui
patent: 2006/0053244 (2006-03-01), Fruhauf et al.
patent: 2006/0218330 (2006-09-01), Tsunekawa
patent: 2003241870 (2003-08-01), None
CN office action mailed Apr. 4, 2008.

Affiliated with

Also associated with

Rating

USB device and mode detecting method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with USB device and mode detecting method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and USB device and mode detecting method thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2713791