Programmable logic device

Abstract From the Canadian patent

Selectors for input signals into a flip-flop circuit are provided, by which an output from a combinational logic circuit of its own PLE and an output from another PLE are made selectable, and the output from the combinational logic circuit is output independently of an output from the flipflop circuit, so that either one of the outputs can be utilizable by use of external programmable wiring. Further by the selection of the respective input selectors of the flip-flop circuits, an output signal from the adjoining flipflop circuit is inputtable, so that the flip flop circuits can be serially connected to each other. Furthermore a last, flip-flop circuit of one PLE supplies an output signal to …