Patents by Inventor Wataru Okamoto

Wataru Okamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Single chip microcomputer with interrupt processing capability during hold states
    Patent number: 5386573
    Abstract: A novel single chip microcomputer comprises a bus, a random access memory connected to the bus, a read only memory, a peripheral interface, a central processing unit taking a hold state according to a hold request signal transmitted from an external device outside the microcomputer, an interrupt controller receiving an interrupt request signal and then delivering an interrupt process request signal to the central processing unit, and a control unit. The control means receives an interrupt request signal from an external device and then delivers both an interrupt process request signal and a hold release signal to the central processing unit to release the central processing unit from the hold state.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: January 31, 1995
    Assignee: NEC Corporation
    Inventor: Wataru Okamoto