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:
Mar. 02, 2010
Filed:
Dec. 12, 2007
Syed Babar Raza, San Jose, CA (US);
Nabil Masri, Sunnyvale, CA (US);
Syed Babar Raza, San Jose, CA (US);
Nabil Masri, Sunnyvale, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A circuit and method are provided that eliminate race conditions in data storage devices. Generally, the circuit includes: (i) an input latch to which an address signal (ADD) is applied; (ii) a multiplexer (MUX) to which the ADD is coupled from the input latch and through which an output is supplied to an output latch; (iii) an address valid signal (ADV) input coupled to the output latch and to which an ADV is applied to close the output latch supplying the output to a circuit output; and (iv) a middle latch coupled between the input latch and the MUX to hold the ADD applied to the MUX until the output latch closes, independent of a change in the ADD applied to the input latch. Preferably, the circuit includes control logic configured to close the middle latch on a rising edge of ADV and reopen it when the output latch closes.