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:
Oct. 29, 2013
Filed:
Apr. 19, 2011
Jiin Lai, New Taipei, TW;
Chin-sung Hsu, New Taipei, TW;
Terrance Shiyang Shih, New Taipei, TW;
Jinkuan Tang, Beijing, CN;
Buheng Xu, Beijing, CN;
Hui Jiang, Beijing, CN;
Jiin Lai, New Taipei, TW;
Chin-Sung Hsu, New Taipei, TW;
Terrance Shiyang Shih, New Taipei, TW;
Jinkuan Tang, Beijing, CN;
Buheng Xu, Beijing, CN;
Hui Jiang, Beijing, CN;
Via Technologies, Inc., Taipei, TW;
Abstract
The present invention is directed to a universal serial bus (USB) transaction translator and a micro-frame synchronization method. A device interface is coupled to a device via a device bus, and a host interface is coupled to a host via a host bus, wherein the host USB version is higher than the device USB version. At least two buffers configured to store data are disposed between the device interface and the host interface. A controller stores the data in the buffers alternately. A start-of-frame (SOF) counter is used to count the SOF packets, wherein the counting value of the SOF counter is compared to a predefined value. Specifically, the controller resets a SOF timer for sending the SOF packet when the counting value achieves the predefined value or is greater than the predefined value, such that the SOF packet and an isochronous timestamp packet (ITP) from the host are sent at the same time. Further, the controller delays the sending of the SOF packet for a period of time according to the ITP from the host. In another embodiment, the sending period of SOF packets may be dynamically adjusted in isochronous transfer.