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. 21, 2013
Filed:
Mar. 29, 2010
Friedrich Hapke, Winsen, DE;
Michael Wittke, Pinneberg, DE;
Sascha Ochsenknecht, Hamburg, DE;
Thomas H. Rinderknecht, Tualatin, OR (US);
Friedrich Hapke, Winsen, DE;
Michael Wittke, Pinneberg, DE;
Sascha Ochsenknecht, Hamburg, DE;
Thomas H. Rinderknecht, Tualatin, OR (US);
Mentor Graphics Corporation, Wilsonville, OR (US);
Abstract
On-chip high speed clock control techniques for testing circuits with multiple clock systems are disclosed. The techniques allow certain (e.g. compatible) high speed clocks to be activated with predefined waveforms during a capture period of a logic test, based on a clock control signal. The clock control signal may be supplied via a JTAG control port or via a scan chain load port. The clock control signal may also be generated by a BIST controller. The techniques may ensure glitch-free transitions from slow speed clocks during a shift period to fast speed clocks during a capture period.