Patents by Inventor Shieh C. Chen

Shieh C. Chen 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).

  • Device for simultaneous data input/output and execution support in digital processors
    Patent number: 5313587
    Abstract: A device for simultaneous data input and output and program execution support in digital processors is disclosed. The device includes a plurality of controllable input and output ports for inputting and outputting data from the device, a data cache memory which is selectively couplable to each of the plurality of input and output ports, and a controller for controlling the plurality of input and output ports and the data cache memory. The connectivity and controlablity provided by the present invention effectuates a transfer of data between any of the plurality of input and output ports or the data cache memory. The device provides multiport high-speed and high-throughput non-multiplexed data input and output while maintaining the speed and throughput characteristics of the digital processor because the input/output data transfer takes place simultaneously with digital processor program execution. The processor need not wait for data transfers from external data sources when this device is used.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: May 17, 1994
    Assignee: Hitachi Micro Systems, Inc.
    Inventors: Chandravadan N. Patel, Richard W. Blasco, Kenneth M. Chan, Shieh C. Chen