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:
Jun. 07, 2016
Filed:
Aug. 26, 2015
Applicant:
Freescale Semiconductor, Inc., Austin, TX (US);
Inventors:
Arun Kumar Barman, Faridabad, IN;
Vivek Sharma, New Delhi, IN;
Assignee:
FREESCALE SEMICONDUCTOR, INC., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/00 (2006.01); G06F 1/08 (2006.01);
U.S. Cl.
CPC ...
G06F 1/08 (2013.01);
Abstract
A fully digital glitch-free clock multiplexer includes a monitoring circuit that automatically switches to a newly selected clock, after a defined time period, from a currently selected clock, when the currently selected clock is absent. A maximum time limit is calculated based on a min and max clock frequency ratio. The monitoring circuit operates only when the clock is being switched. This provides flexibility to software to switch the clock any time whether or not the current clock is present, and prevents the system from hanging in the absence of the clock.