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:
Jan. 07, 2003
Filed:
Sep. 05, 1997
William C. Moyer, Dripping Springs, TX (US);
John Arends, Austin, TX (US);
Jeffrey W. Scott, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A processor ( ) to coprocessor ( ) interface supporting multiple coprocessors ( ) utilizes compiler generatable software type function call and return, instruction execute, and variable load and store interface instructions. Data is moved between the processor ( ) and coprocessor ( ) on a bi-directional shared bus ( ) either implicitly through register snooping and broadcast, or explicitly through function call and return and variable load and store interface instructions. The load and store interface instructions allow selective memory address preincrementation. The bi-directional bus ( ) is potentially driven both ways on each clock cycle. The interface separates interface instruction decode and execution. Pipelined operation is provided by indicating decoded instruction discard by negating a decode signal before an execute signal is asserted.