Patents Examined by Guy Lamane
  • Semiconductor memory device having scan flip-flops
    Patent number: 6237122
    Abstract: A semiconductor memory device includes a plurality of scan flip-flops connected in series for storing parallel data externally provided in a normal operation mode and for storing serial data externally provided in a scan mode by shifting the serial data. The semiconductor memory device further includes a control circuit which controls the plurality of scan flip-flops to refrain from shifting the serial data when data-read operations and data-write operations are conducted in the scan mode.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: May 22, 2001
    Assignee: Fujitsu Limited
    Inventor: Takashi Maki