Donald R Perkins

US Patent:

7480753, Jan 20, 2009

Filed:

Apr 27, 2006

Appl. No.:

11/412431

Inventors:

Mark R. Bohm - Village of Bear Creek TX, US
Donald L. Perkins - Austin TX, US
Carl J. Crawford - Austin TX, US

Assignee:

Standard Microsystems Corporation - Hauppauge NY

International Classification:

G06F 13/00

US Classification:

710104, 710313

Abstract:

System and method for switching logic in a Universal Serial Bus hub. The USB hub may include upstream logic and downstream logic for sending and receiving information from a host controller and a USB device respectively. The USB hub may include a plurality of ports operable to couple to a plurality of devices, including a first port coupled to the upstream logic and a second port coupled to the downstream logic. The USB hub may also include switching logic operable to switch the upstream and the downstream logic with respect to the first port and the second port respectively. The switching logic may switch the upstream and downstream logic by decoupling the first port from the upstream logic, decoupling the second port from the downstream logic, and coupling the second port to the upstream logic. Additionally, the first port may be coupled to the downstream logic.

US Patent:

20150331826, Nov 19, 2015

Filed:

May 1, 2015

Appl. No.:

14/701924

Inventors:

- Chandler AZ, US
Donald L. Perkins - Austin TX, US

Assignee:

Microchip Technology Incorporated - Chandler AZ

International Classification:

G06F 13/40
G06F 13/42

Abstract:

A USB hub integrated circuit device, comprising USB hub logic comprising a plurality USB ports, wherein at least one port comprises a pair of bi-directional transmission channels, wherein for the at least one port two physical layers are provided in parallel, each physical layer being associated with one bidirectional transmission channel, wherein the USB hub logic is further configured to select one of said physical layers for each port depending on a logic condition.