Patents by Inventor Yoshiaki Nagatomi

Yoshiaki Nagatomi 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).

  • Semiconductor device and entry into test mode without use of unnecessary terminal
    Patent number: 7372760
    Abstract: A semiconductor device includes a first power supply terminal, a second power supply terminal, a comparison circuit coupled to the first power supply terminal and the second power supply terminal to produce at an output node thereof a signal responsive to a difference between a potential of the first power supply terminal and a potential of the second power supply terminal, and a core circuit coupled to the output node of the comparison circuit to perform a test operation in response to the signal.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: May 13, 2008
    Assignee: Fujitsu Limited
    Inventors: Yoshiaki Nagatomi, Kenichi Kawabata, Norihiro Nakatsuhama, Tetsuya Yoshida, Naoya Watanabe, Tomohiro Wada, Tomohide Yamamoto
  • Semiconductor device and microcontroller
    Patent number: 7149830
    Abstract: A semiconductor device in which input terminals for external interrupts can be set as desired. A plurality of external input terminals can be specified as interrupt terminals which output an input signal to an external interrupt circuit via an interrupt terminal selector. A selection control circuit specifies whether a plurality of external input terminals are used as interrupt terminals. According to the selection control circuit, the interrupt terminal selector outputs to the external interrupt circuit an input signal entered from an external input terminal which is specified as an interrupt terminal out of the plurality of external input terminals.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: December 12, 2006
    Assignee: Fujitsu Limited
    Inventors: Norihiro Nakatsuhama, Yoshiaki Nagatomi, Kenichi Kawabata, Tomohide Yamamoto, Kenji Nakata, Hironori Aono, Masatoshi Konishi
  • Semiconductor device and entry into test mode without use of unnecessary terminal
    Publication number: 20060268636
    Abstract: A semiconductor device includes a first power supply terminal, a second power supply terminal, a comparison circuit coupled to the first power supply terminal and the second power supply terminal to produce at an output node thereof a signal responsive to a difference between a potential of the first power supply terminal and a potential of the second power supply terminal, and a core circuit coupled to the output node of the comparison circuit to perform a test operation in response to the signal.
    Type: Application
    Filed: August 22, 2005
    Publication date: November 30, 2006
    Inventors: Yoshiaki Nagatomi, Kenichi Kawabata, Norihiro Nakatsuhama, Tetsuya Yoshida, Naoya Watanabe, Tomohiro Wada, Tomohide Yamamoto
  • Information processing device
    Patent number: 7010709
    Abstract: An information processing device capable of accepting a communication request from another information processing device without fail, regardless of whether the device is in a standby state or not. A first condition detection circuit detects, synchronously with a clock signal, a communication start condition for starting communication with the other information processing device, and a second condition detection circuit detects, asynchronously with the clock signal, the communication start condition for starting communication with the other information processing device. A selector circuit selects a suitable one of the first and second condition detection circuits.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: March 7, 2006
    Assignee: Fujitsu Limited
    Inventors: Norihiro Nakatsuhama, Yoshiaki Nagatomi, Yoshiyuki Kubo
  • Semiconductor device and microcontroller
    Publication number: 20050188141
    Abstract: A semiconductor device in which input terminals for external interrupts can be set as desired. A plurality of external input terminals can be specified as interrupt terminals which output an input signal to an external interrupt circuit via an interrupt terminal selector. A selection control circuit specifies whether a plurality of external input terminals are used as interrupt terminals. According to the selection control circuit, the interrupt terminal selector outputs to the external interrupt circuit an input signal entered from an external input terminal which is specified as an interrupt terminal out of the plurality of external input terminals.
    Type: Application
    Filed: September 23, 2004
    Publication date: August 25, 2005
    Applicant: FUJITSU LIMITED
    Inventors: Norihiro Nakatsuhama, Yoshiaki Nagatomi, Kenichi Kawabata, Tomohide Yamamoto, Kenji Nakata, Hironori Aono, Masatoshi Konishi
  • Information processing device
    Publication number: 20030167416
    Abstract: An information processing device capable of accepting a communication request from another information processing device without fail, regardless of whether the device is in a standby state or not. A first condition detection circuit detects, synchronously with a clock signal, a communication start condition for starting communication with the other information processing device, and a second condition detection circuit detects, asynchronously with the clock signal, the communication start condition for starting communication with the other information processing device. A selector circuit selects a suitable one of the first and second condition detection circuits.
    Type: Application
    Filed: January 30, 2003
    Publication date: September 4, 2003
    Applicant: Fujitsu Limited
    Inventors: Norihiro Nakatsuhama, Yoshiaki Nagatomi, Yoshiyuki Kubo