Patents by Inventor Hiroki Sutou

Hiroki Sutou 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).

  • 1-chip microcomputer having controlled access to a memory and IC card using the 1-chip microcomputer
    Patent number: 7213117
    Abstract: A 1-chip microcomputer of the present invention has (a) a monitor flag for setting a flag indicating that a specified address space is accessed, (b) an access permission address range setting register, for setting an address range in which an access is permitted while the flag is set, (c) an access permission area detection circuit for judging whether the access is made within the address range thus set, (d) an access permission setting register, for setting whether or not an access with respect to an address other than the address range should be permitted, and (e) memory read-out control circuit and memory writing control circuit for controlling an access with respect to a nonvolatile memory based on a result thus judged and content set by the access permission setting register. With the arrangement, it is possible to provide a 1-chip microcomputer that maintains the security among application programs.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: May 1, 2007
    Assignees: Sharp Kabushiki Kaisha, Nippon Telegraph and Telephone Corporation
    Inventors: Masaki Wakabayashi, Ryuichi Ogawa, Kazuhiro Yaegawa, Susumu Kurioka, Kenji Ohno, Tadao Takeda, Hiroki Sutou, Masahiro Yoshizawa
  • 1-chop microcomputer and IC card using same
    Publication number: 20010027511
    Abstract: A 1-chip microcomputer of the present invention has (a) a monitor flag for setting a flag indicating that a specified address space is accessed, (b) an access permission address range setting register, for setting an address range in which an access is permitted while the flag is set, (c) an access permission area detection circuit for judging whether the access is made within the address range thus set, (d) an access permission setting register, for setting whether or not an access with respect to an address other than the address range should be permitted, and (e) memory read-out control circuit and memory writing control circuit for controlling an access with respect to a nonvolatile memory based on a result thus judged and content set by the access permission setting register. With the arrangement, it is possible to provide a 1-chip microcomputer that maintains the security among application programs.
    Type: Application
    Filed: March 14, 2001
    Publication date: October 4, 2001
    Inventors: Masaki Wakabayashi, Ryuichi Ogawa, Kazuhiro Yaegawa, Susumu Kurioka, Kenji Ohno, Tadao Takeda, Hiroki Sutou, Masahiro Yoshizawa