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Method for simplifying circuit board configuration circuit

A technology for configuring circuits and circuit boards. It is applied in electrical program control, program control in sequence/logic controllers, instruments, etc. It can solve the problems of difficulty in configuring circuits and inability to modify according to functional needs, and achieve fewer types of chips. , to solve the metastable problem, the effect of high reliability

Active Publication Date: 2018-06-29
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

At the same time, the configuration circuit implemented by using a dedicated chip is very difficult to layout and route, and cannot be modified according to functional requirements during later verification.

Method used

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  • Method for simplifying circuit board configuration circuit
  • Method for simplifying circuit board configuration circuit
  • Method for simplifying circuit board configuration circuit

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Experimental program
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Embodiment Construction

[0018] The circuit board is composed of multiple independent functional circuits and programmable logic devices such as CPU, memory, and functional chips. The functional circuit is connected to the programmable logic device through the bus, and the configuration and interconnection of each functional circuit on the circuit board are realized by the programmable logic device.

[0019] The programmable logic device realizes the reset function, the level conversion function, the signal driving function and the dynamic switching function. composed of interconnected units.

[0020] The realization of reset function includes reset interface unit, logical AND unit, counter unit and delay reset output unit. The reset interface unit receives reset input signals 1~n, uses a 2-level flip-flop under the action of the local clock to convert the input reset signal into a local reset signal 1~n in the local clock domain, and uses a 2-level flip-flop to convert the reset signal clock domain ...

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Abstract

The invention belongs to computer hardware technology and relates to an implementation method of a circuit board configuration circuit. According to the invention, a programmable logic device is usedfor implementing functions of resetting, electric level conversion and signal driving and a resetting circuit, an electric level converting circuit and a signal driving circuit using dedicated chips are replaced. According to the invention, no dedicated chips are required, the chip variety is small and the reliability is high. By using the programmable logic device, layout wiring can be simplified. Through a re-programming method, the resetting output and interconnection relation of the configuration circuit can be adjusted. A problem of semi-stable state caused by resetting is solved. Dynamicswitching of a redundancy circuit is realized.

Description

technical field [0001] The invention belongs to computer hardware technology, and relates to a realization method of a circuit board configuration circuit. Background technique [0002] The circuit board is generally composed of multiple independent functional circuits such as CPU, memory, and functional chips. The functional circuits are initialized after power-on reset, and then interconnected through the bus. [0003] In order to realize the normal operation of the circuit board, the configuration and interconnection of various functional circuits are realized through the configuration circuit. The main functions of the configuration circuit include power-on reset, level shifting and bus driving. Since the initialization time of each functional circuit is different, in order to prevent access errors when the functional circuits access each other, it is necessary to use a power-on reset to control the initialization sequence of the functional circuits. At the same time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
CPCG05B19/056
Inventor 杨可冯晓东朱志强刘军伟李亚各
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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