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:
Apr. 12, 1994
Filed:
Mar. 18, 1993
David Chiang, Saratoga, CA (US);
Thomas Y Ho, Milpitas, CA (US);
Jeffrey H Seltzer, San Jose, CA (US);
Jeffrey Goldberg, San Jose, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
An input block for PLDs programmable logic devices) has a flip-flop including a master latch and a slave latch, a pad for inputting data, configuration bits, and a global clock input signal for clocking the input data to the flip-flop means. The flip-flop is controlled by the configuration bits so as to function alternatively as a register, a latch or transparently. The input block further includes at least one clock enable signal input terminal and logic elements responding to the configuration bits for providing the clock enable signal for the register function as well as the latch function of the flip-flop.