Patents Examined by Steven Wan
  • Microcomputer with built-in serial input-output circuit and collision detection circuit responsive to common input-output line being occupied
    Patent number: 5636343
    Abstract: Even in the case where a microcomputer according to the present invention is directly connected to a bus in a LAN, it is possible to upgrade the data transfer speed of the LAN. When a built-in exclusive-OR circuit in the SIO of the microcomputer detects the discordance between a signal at an R.times.D terminal and a signal at a T.times.D terminal, a D flip-flop circuit generates and sends out an interrupt signal to the CPU. The CPU is made to recognize the collision of signals by the generation of the interrupt signal.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: June 3, 1997
    Assignees: Mitsubishi Electric Semiconductor Software Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Asano, Kimikatsu Matsubara