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:
May. 29, 2001
Filed:
Jul. 31, 1998
Michael Dean Snyder, Austin, TX (US);
David William Todd, Austin, TX (US);
Brian Keith Reynolds, Round Rock, TX (US);
Michael Julio Garcia, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A bus protocol for a split bus (,) where each device (,) coupled to the bus has an age-based queue (,) of pending transactions. Queues are updated as transactions are executed. A central arbiter (,) has a copy of each device's queue (,). A priority transaction is determined from among all the queues in the arbiter. A data transaction index (DTI) is broadcast during the data tenure to all devices indicating the position in the queue of the next transaction. The index allows out-of-order data transfers without the provision of a static tag during the address tenure. Queues maintain a history of pending transactions. In one embodiment, each device receives a separate data bus grant (DBG), allowing a single provision of the index to both a source and a sink device.