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:
Nov. 25, 2008
Filed:
Oct. 23, 2006
David L. Griffith, Fremont, CA (US);
Michel P. Cekleov, Mountain View, CA (US);
David L. Griffith, Fremont, CA (US);
Michel P. Cekleov, Mountain View, CA (US);
3Par, Inc., Fremont, CA (US);
Abstract
A memory controller includes a gate circuit gating a data strobe signal from a memory device, a delay circuit delaying the data strobe signal from the gate circuit, a read buffer capturing values of a data signal from the memory device in response to the data strobe signal, a cumulative strobe counter incrementing a detected strobe count by the number of edges detected in the data strobe signal, and a control logic controlling the gate circuit and receiving the detected strobe count from the strobe counter. The control logic enables and disables the gate circuit after the start of a preamble and before the end of a postamble in the data strobe signal, respectively. When the memory controller is not expecting the data strobe signal from the memory device, the control logic compares the detected and the expected strobe counts and reports a strobe error when they do not match.