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. 04, 1999
Filed:
Sep. 24, 1997
Kazuichi Ooe, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A memory protection setting unit sets a protection area in a multiport memory provided with two ports, that is, port A and port B. The CPU accesses the multiport memory through port A. At this time, an area other than the protection area can be accessed. The CPU transmits data to an external device through a transfer control device. The transfer control device accesses the multiport memory through port B. Only the protection area can be accessed at this time. Upon receipt of a request from the CPU, the transfer control device writes data received from the external device to the protection area and reads data to be sent to the external device from the protection area. Protection is removed by the memory protection setting unit from the protection area where data is read or written by the transfer control device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile