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Symmetric connect passage of programmable logic device

A programming logic and symmetrical technology, which is applied in the direction of electric solid-state devices, semiconductor devices, semiconductor/solid-state device components, etc., can solve the problems of large static power consumption, increased chip implementation area, weak driving ability, etc., to reduce delay time, improve the delay characteristics and area characteristics, and reduce the effect of realizing the area

Active Publication Date: 2007-05-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Symmetric connect passage of programmable logic device
  • Symmetric connect passage of programmable logic device
  • Symmetric connect passage of programmable logic device

Examples

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Embodiment Construction

[0027] The line segment of the wiring unit realizes the connection between the logic function blocks, and its length has a great influence on the delay characteristic of the system: if the wiring channel is completely composed of very long line segments of the wiring unit, the adjacent logic function The connection between the blocks will cause a waste of connection resources, thereby increasing the implementation area of ​​the programmable logic device; if they are all composed of very short connection unit line segments, the connection between the logic function blocks that are far apart requires More wiring unit line segments are connected through the wiring channel crossbar, which on the one hand will deteriorate the delay characteristics of the system, and on the other hand will increase the implementation area of ​​the programmable logic device due to the increase in the connection buffer. Therefore, there should be a part of longer wiring unit line segments in the wiring...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/522
Inventor 杨海钢李兴政
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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