The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2009
Filed:
May. 14, 2007
Chao-hsuan Hsueh, Shijr, TW;
Chao-Hsuan Hsueh, Shijr, TW;
Aten International Co., Ltd, Shijr, TW;
Abstract
A USB device using one USB device controller to simulate multiple virtual USB devices with a virtual USB hub is described. The USB device controller is assigned a USB address and communicates with the USB host under the control of an MCU and its firmware. The USB device also includes a CPLD (or FPGA or ASIC) and an analog switch for filtering the USB packets from the host and replacing the address in the packet by a fixed address before sending the packet to the USB device controller. The address in the original packet is stored in the CPLD and accessible by the MCU. The MCU controls the USB device controller to simulate one or more USB hubs and multiple USB devices.