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:
Jul. 20, 2004
Filed:
Jan. 12, 2001
Kei Kubota, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
It is to provide a method of transferring a program to an internal memory from an external memory at a high speed and at a high efficiency. The external memory has program data to be transferred and set data of a dedicated register including wait information of the program data. A microcomputer has an internal ROM to which a transfer program for transferring data to an internal RAM from the external memory is prestored. If a CPU in the microcomputer accesses set data for the dedicated register at the head address of the external memory and receives the set data including the wait information of data to be transferred when reset is released, the data is transferred to the internal RAM via an address bus and a data bus by executing the transfer program in the internal ROM. An area of the transferred data in the internal RAM is rearranged at an area including a boot area and a vector table and the program data is executed by the CPU.