Patents by Inventor Mutsuhiro Naito

Mutsuhiro Naito 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).

  • Processor capable of enabling/disabling memory access
    Patent number: 6647475
    Abstract: A low-end microprocessor 10 includes a stack pointer 18 storing a word SPV, a comparator 17 comparing the SPV with a given value ADR1, an inverter 19 inverting the compared result CP, and an AND gate 16 receiving a write request signal WR from a CPU 11 and the output of the inverter 19. The AND gate 16 provides its output to the write enable signal input WE of a memory 12 in order to determine enabling/disabling of writing according to the depth of stack.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: November 11, 2003
    Assignee: Fujitsu Limited
    Inventors: Mutsuhiro Naito, Kazuaki Mizoguchi
  • Processor capable of enabling/disabling memory access
    Publication number: 20020026567
    Abstract: A low-end microprocessor 10 includes a stack pointer 18 storing a word SPV, a comparator 17 comparing the SPV with a given value ADR1, an inverter 19 inverting the compared result CP, and an AND gate 16 receiving a write request signal WR from a CPU 11 and the output of the inverter 19. The AND gate 16 provides its output to the write enable signal input WE of a memory 12 in order to determine enabling/disabling of writing according to the depth of stack.
    Type: Application
    Filed: February 26, 2001
    Publication date: February 28, 2002
    Inventors: Mutsuhiro Naito, Kazuaki Mizoguchi