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. 31, 2010
Filed:
Oct. 12, 2006
Takashi Kawamoto, Kokubunji, JP;
Tomoaki Takahashi, Hachioji, JP;
Shinya Kikuchi, Takasaki, JP;
Yoshimi Ishida, Kodaira, JP;
Hiromitsu Nishio, Funabashi, JP;
Takashi Kawamoto, Kokubunji, JP;
Tomoaki Takahashi, Hachioji, JP;
Shinya Kikuchi, Takasaki, JP;
Yoshimi Ishida, Kodaira, JP;
Hiromitsu Nishio, Funabashi, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
Disclosed is a semiconductor IC device using a low-price oscillator, which is capable of bidirectional communication with a host and features a low price. In bidirectional communication between a host and a device, the device comprises a synchronization establishment unit, a frequency difference detector, a frequency generator, and an oscillator providing a reference signal. The synchronization establishment unit to which an output signal from the host is inputted outputs a received signal, a synchronization establishment signal and a reception data. The frequency difference detector detects a frequency difference between a received signal and a transmitting signal, and outputs a frequency coordination signal to the frequency generator. The number of frequency division of the frequency generator is controlled by the frequency coordination signal, and the frequency generator is capable of matching the frequency of the transmitting signal which is an output signal with the frequency of the received signal.