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. 26, 1999
Filed:
Nov. 17, 1995
Marc E Levitt, Sunnyvale, CA (US);
Harsimran Singh Grewal, Palo Alto, CA (US);
Sun Microsystems, Inc., Mountain View, CA (US);
Abstract
A control circuit to stop an integrated circuit internal clock includes a signal distribution trace connected to a clock stop pipeline. The signal distribution trace creates a large phase delay signal for a first integrated circuit internal clock cycle which activates the clock stop pipeline, and a small phase delay signal for a final integrated circuit internal clock cycle that deactivates the clock stop pipeline. The clock stop pipeline includes a first circuit component to generate an intermediate stop instruction in response to a clock stop command and the large phase delay signal of the first integrated circuit internal clock cycle. The intermediate stop instruction proceeds through the clock stop pipeline in response to clock cycles following the first clock cycle. The clock stop pipeline includes a final circuit component to produce a final stop instruction when the intermediate stop instruction and the small phase delay signal of the final integrated circuit internal clock cycle are received at the final circuit component. The final stop instruction is used to lock the integrated circuit internal clock in a single digital state.