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. 28, 2007
Filed:
Dec. 01, 2005
Masahiro Tonami, Kanagawa, JP;
Masahiro Tonami, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A copy protection circuit to prevent illegal copy of a circuit configuration data when the user circuit data is read out and transferred from a storage device to a rewritable gate array (FPGA), includes a control circuit, a data generating circuit and a data switch circuit. The control circuit controls transfer of the circuit configuration data from the storage device to the FPGA, and the data generating circuit generates pseudo circuit configuration data. The data switch circuit transfers to the FPGA, the circuit configuration data read out from the storage circuit and the pseudo circuit configuration data outputted from the data generating circuit. The data switch circuit transfers to the FPGA the circuit configuration data which is less than a data amount that the FPGA needs, and then the pseudo circuit configuration data.