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. 20, 2003
Filed:
Jan. 07, 2002
Yoshihide Bando, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An external command receiving circuit receives an external command signal supplied from the exterior, in synchronization with one transition edge of a first clock signal. An internal command receiving circuit receives an internal command signal internally generated, in synchronization with the other transition edge of the first clock signal. Namely, receiving operation of the internal command signal by the internal command receiving circuit shifts from that of the external command signal by the external command receiving circuit by at least a half cycle of the first clock signal. Immediately after starting an operation according to the external command signal, a control circuit for operating an internal circuit does not receive an operation request according to the internal command signal. This can prevent conflict in operation between the internal circuit according to the external command signal and the internal circuit according to the internal command signal, and also prevent malfunction.