System and method for USB controllers

Details System and method for USB controllers System and method for USB controllers

2006-04-25

2006-04-25

Perveen, Rehana (Department: 2112)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output data buffering

C710S052000, C710S053000, C710S310000

Reexamination Certificate

active

07035948

ABSTRACT:
A USB controller is provided with multiple logic channels that share same physical address and data bus at an interface between the host system and the USB Host Controller; and dataports used by the host system to read and/or write data to the USB Host Controller. Also provided is a data packet format for transferring data, which comprises of an Endpoint Transfer Descriptor (“ETD”) that includes an EndPoint Descriptor and a Transfer Descriptor, wherein the host system programs the parameters of a communication channel for a particular Endpoint. Also included is a technique for partitioning a memory storage device into a first memory buffer and a second memory buffer; wherein the size of the first and second memory buffer may be programmed by the host system and the first and/or second memory buffer may contain more than one USB packet.

REFERENCES:
patent: 6047339 (2000-04-01), Su et al.
patent: 6421770 (2002-07-01), Huch et al.
patent: 6553460 (2003-04-01), Chopra et al.
patent: 6643755 (2003-11-01), Goodhue et al.
patent: 6718445 (2004-04-01), Lewis et al.
USB Specification 2.0, Apr. 27, 2000, pp. 58-65.

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