Patents by Inventor James Andrew Collier A. Scobie

James Andrew Collier A. Scobie 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).

  • Publication number: 20130111168
    Abstract: An electronic system includes multiple data access components (DACs), a semaphores module, and a memory protection unit (MPU). Any of the DACs may issue an access request, which requests access to a shared system resource. A region descriptor associated with the shared system resource specifies default access permissions for the DACs. The semaphores module implements a semaphore for the shared system resource, and produces semaphore signals indicating which one, if any, of the DACs has locked the semaphore for the shared system resource. More particularly, an access evaluation circuit of the MPU receives the default access permissions and the semaphore signals. When the semaphore is properly enabled, as indicated in the region descriptor, the access evaluation circuit produces effective access permissions for the DACs by potentially altering the default access permissions based on the semaphore signals. The MPU grants or denies the access request based on the effective access permissions.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 2, 2013
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Joseph C. Circello, James Andrew Collier A. Scobie