Invention Grant
- Patent Title: Method and system for high-speed detection handshake in universal serial bus based data communication system
- Patent Title (中): 基于通用串行总线数据通信系统的高速检测握手方法与系统
-
Application No.: US12628222Application Date: 2009-12-01
-
Publication No.: US08176227B2Publication Date: 2012-05-08
- Inventor: Mayank Devam , Vinay Gupta , Akshat Mittal , Parul K Sharma
- Applicant: Mayank Devam , Vinay Gupta , Akshat Mittal , Parul K Sharma
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agent Charles Bergere
- Main IPC: G06F13/42
- IPC: G06F13/42
Abstract:
A USB system includes a USB hub, a USB device, and a USB bus interconnecting the USB hub and the USB device. The USB hub asserts a reset signaling on the USB bus to initiate a high-speed detection handshake. The USB hub and the USB device activate corresponding dual-mode squelch detectors in a first (handshake) mode of operation. The USB device transmits a device chirp signal to the USB hub. The USB hub responds with a sequence of hub chirp signals. The USB device detects the hub chirp signals and then the USB hub and the USB device establish a communication link in a high-speed mode of communication in accordance with USB 2.0. The dual-mode squelch detectors in the USB hub and the USB device can also be activated in a second (normal) mode of operation.
Public/Granted literature
Information query
