Combined access device and method of controller and multiple programmable logical device

Abstract

This invention relates to a combined access device and a method for a controller and multiple programmable logic devices. The device includes: a controller and multiple programmable logic devices, one of which is designed as the master programmable logic device, the rest are the sub ones, the controller realizes the access operation to all logic devices by accessing the master device only. The method includes: A, designing one of the multiple programmable logic devices as the master one, the rest as the sub one s and allocating address space values for the multiple devices in advance, B, the controller is connected with the master programmable logic device via the control interface bus, C, the master device is connected with all sub-devices by internal links. It's only necessary for the controller to access the master one when it accesses the devices.

Description

technical field [0001] The invention relates to electronic equipment, in particular to a combined access device and method for a controller (such as a CPU, etc.) and a plurality of programmable logic devices. Background technique [0002] In the early design of electronic products, the realization of the functions of electronic modules was basically composed of many discrete devices. As the functions and designs of electronic products became more and more complex, the requirements for circuit integration became higher and higher. In this Under the circumstances, programmable logic chips (including CPLD, EPLD and FPGA chips, etc.) are widely used. In the single-board design of current switches and many other electronic products, it is often necessary to use programmable logic chips to assist the CPU (Central Process Unit, central processing unit) to design various perfect single-board control circuits. Start to help the CPU control peripheral chips and devices, and collect i...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a combined access device and method for a controller (taking CPU as an example) and a plurality of programmable logic devices, so as to solve the problems in the access circuit design of a plurality of programmable logic devices in the prior art. The hardware design of the CPU interface is complex, and it also saves a lot of CPU address space

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