Programmable logic device having programmable wiring for connecting adjacent programmable logic elements through a single switch station

Claim 2

A programmable logic device including a plurality of programmable logic elements connected to each other through a programmable wiring, said programmable wiring comprising: a plurality of switch stations each having a plurality of input/output terminals, each switch station including therein switch elements each for interconnecting said input/output terminals; first wirings each for exclusively and directly connecting some terminals among said input/output terminals of said switch stations to input/output terminals of adjacent logic elements such that a plurality of adjacent programmable logic elements are connectable through a single one of said switch stations; and second wirings each for exclusively and directly connecting some terminals among said input/output terminals of said switch stations to the input/output terminals of adjacent switch stations.

Claim 3

A programmable logic device according to claim 1 wherein said first wirings and said second wirings have directional orientations different from each other.

Claim 4

A programmable logic device according to claim 1 wherein said switch station comprises a plurality of switch elements for implementing a predetermined switch table.

Claim 5

A programmable logic device according to claim 1 wherein said programmable logic element is a sequential circuit which comprises a combined logic circuit, into which any general purpose input is inputted, and a flip-flop for delaying a combined logical output from said combined logic circuit in response to a clock signal to generate a delayed output.

Claim 6

A programmable logic device including a plurality of programmable logic elements connected to each other through a programmable wiring, said programmable wiring comprising: a plurality of programmable logic elements, each of said programmable logic elements forming a sequential circuit comprising: a combined logic circuit into which any general purpose input is inputted; a flip-flop for delaying a combined logical output from said combined logic circuit in response to a clock signal to generate a delayed output; a plurality of switch stations each having a plurality of input/output terminals, each switch station including therein switch elements each for interconnecting said input/output terminals; first wirings each for exclusively and directly connecting some terminals among said input/output terminals of said switch stations to input/output terminals of adjacent logic elements; and second wirings each for exclusively and directly connecting some terminals among said input/output terminals of said switch stations to the input/output terminals of adjacent switch stations.

Claim 7

A programmable logic device including a plurality of programmable logic elements connected to each other through a programmable wiring, said programmable wiring comprising: a plurality of programmable logic elements, each of said programmable logic elements forming a sequential circuit comprising: a combined logic circuit into which any general purpose input is inputted; a flip-flop for delaying a combined logical output from said combined logic circuit in response to a clock signal to generate a delayed output; a plurality of switch stations each having a plurality of input/output terminals, each switch station including therein switch elements each for interconnecting said input/output terminals; first wirings each for exclusively and directly connecting some terminals among said input/output terminals of said switch stations to input/output terminals of adjacent logic elements; and second wirings each for exclusively and directly connecting some terminals among said input/output terminals of said switch stations to the input/output terminals of adjacent switch stations.