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:
Oct. 12, 1999
Filed:
Apr. 15, 1996
Chien-Yin Liu, Austin, TX (US);
Kirk S Livingston, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The present invention relates in general to a data processing system (10), and more particularly to a method and apparatus for providing instruction pipe (106) status information, including fullness information, external to data processing system (10). In one embodiment, an IPIPE2 integrated circuit terminal (15) is used to serially provide a pipe depth value indicating the fullness of the instruction pipe (106). The serial protocol used with the IPIPE2 (15) terminal includes a start bit, a fetch pointer value, and a plurality of idle bits. In one embodiment, IPIPE0 (13) and IPIPE1 (14) integrated circuit terminals may indicate loading and unloading of instruction pipe (106) and may stop toggling when central processing unit (102) is in a loop mode.