The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2004
Filed:
Feb. 01, 2002
David C. Wyland, Morgan Hill, CA (US);
Cradle Technologies, Inc., Mountain View, CA (US);
Abstract
Methods for waking up an idle memory transfer controller (MTC) in response to an event from an external source. The first mechanism, Parameter List Pointer (PLP) FIFO Wake Up, wakes up an MTC after an external agent writes to an MTC's PLP FIFO. This activates the MTC's run bit, making the MTC eligible to execute instructions if chosen to do so by the memory transfer engine arbiter. This mechanism allows the MTC to distinguish between multiple possible originators of multiple possible wake-up events; wake-up events may be queued. Events may be directed to particular MTCs or to the next MTC available to process the event. The second mechanism wakes up an MTC after an external agent writes to an MTC's external wake-up address. This sets the MTC's run bit, making the MTC eligible to execute instructions if chosen to do so by the memory transfer engine arbiter. This approach only recognizes one event and one source. Events may not be queued using this approach.