Symmetric connect passage of programmable logic device

Abstract

The invention relates to a programmable logic element, especially the connecting channel and channel cross switch, as compensate cross switch, wherein the connecting line in the horizontal connecting channel is equally divided into upper and lower parts which are symmetry with the central line of connecting channel; the line of vertical connecting channel is same as the line in horizontal connecting channel; the line in horizontal connecting channel is rotated 90degree anti-clockwise, then turned over based on the central line, to obtain the vertical connecting channel. The invention can reduce time delay of connecting channel, and reduce area of cross switch, to improve property.

Description

technical field [0001] The present invention is generally related to a programmable logic device (Programmable Logic Device, referred to as PLD), especially related to a connection channel of a programmable logic device and a crossbar switch structure of a connection channel. technical background [0002] Because of its programmability, programmable logic devices are very flexible, which makes them a widely used integrated circuit. The programmable logic device includes a complex programmable logic device (Complex Programmable Logic Device, CPLD for short), a field programmable gate array (Field Programmable Gate Array, FPGA for short), and the like. From a structural point of view, a programmable logic device includes three parts: logic function blocks, connection resources, and input and output units. The logic function blocks implement specific logic functions; the input and output units implement the interface between the circuit and the outside world; connections betwe...

AI Technical Summary

Problems solved by technology

Although the transmission tube is much smaller than the three-state buffer, its defects are also obvious: weak driving ability and high static power consumption, so it is impossible to completely replace the three-state buffer

Due to the unidirectionality of its signal transmission, the tri-state buffers in the crossbar of the wiring channel usually appear in pairs to realize the bidirectional transmission of signals, which further increases the chip implementation area.

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