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:
May. 25, 2010
Filed:
Aug. 13, 2007
LI Zhang, Suzhou, CN;
Su-fen Wei, Suzhou, CN;
Yan Xiao, Suzhou, CN;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
An application processor circuit has SD-compatible interface protocols and can perform both host and slave functions. The circuit includes SD bus interface logic for realizing SD interface signals defined in SD-compatible interface protocols; system bus interface logic for performing the interface function on the system bus side; a data buffer for adjusting the data transfer rate difference between the SD bus interface and the system bus interface; a data buffer controller for controlling access to the data buffer; and a configuration unit for configuring the circuit to work in the host mode or slave mode. The SD-compatible interface protocols include MMC/SD/SDIO protocol, high speed MMC/SD/SDIO protocol, and CE-ATA interface protocol. The SD host logic and slave logic are incorporated in a single module to support both the SD host and slave functions, so as to achieve more convenient data transfer between electronic devices.