Eiko B Junus

US Patent:

7831748, Nov 9, 2010

Filed:

Aug 10, 2004

Appl. No.:

10/915065

Inventors:

Mitchell Stephen Dernis - Seattle WA, US
Ankur Varma - San Francisco CA, US
Wei Guo - Sammamish WA, US
Eiko Junus - San Jose CA, US
Gregory George Williams - Menlo Park CA, US
Harjit Singh - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 3/00
G06F 13/20
G06F 13/00
H04L 12/56
H04L 12/28

US Classification:

710 36, 710 8, 710 12, 710 14, 710 37, 710 49, 710313, 710317, 370392, 370402

Abstract:

An extension to the Universal Serial Bus (USB) protocol that utilizes reserved bits in the OHCI Endpoint Descriptors to signal which root hub port(s) should transmit the data. Typically, all ports transmit (broadcast) data. The present invention encodes transmission information that can be used by the hardware to effectively control which port(s) need to be tri-stated. However, by setting, the “on” bits for all the ports, the present invention retains standard USB functionality. Also provided is a method to increase the bandwidth of low speed devices connected to the USB bus by increasing the data payload for such devices.

US Patent:

20060020860, Jan 26, 2006

Filed:

Jul 22, 2004

Appl. No.:

10/897058

Inventors:

John Tardif - San Jose CA, US
Stephen Au - San Jose CA, US
Eiko Junus - San Jose CA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G01R 31/28

US Classification:

714724000

Abstract:

A Multiple Input Shift Register (MISR) is used to generate signatures, based on data from a device under test, in order to validate the proper sequence and content of the data over a defined period of time. The MISR described herein includes the ability to “tag” the signatures for each time period using an incrementing value, and make that tag and the signature readable by a test controller. The MISR has the flexibility to be reset to a known initial state (or otherwise load a seed value) at the beginning of each time period or to continue accumulating signatures without being reset (or using the seed value). Accumulation of signatures over an extended period of time allows a test controller to validate that no errors occurred during a long term test without having to closely monitor the intermediate results.