Detection method, equipment and system of address bus

Abstract

The invention provides detection method, equipment and system of an address bus. The method comprises following steps of: respectively writing first detection data and second detection data into a first special address and a second special address, wherein binary numbers corresponding to the first special address and the second special address consist of alternate high-low levels; respectively carrying out an inverting operation on the data written into the first special address and the second special address according to the position by using a functional chip; respectively acquiring first reference data and second reference data by reading the first special address and the second special address; and carrying out XOR operation on the first reference data and the second reference data and detecting the fault condition of the address bus according to an operation result. The invention also provides a detection method of another address bus, a central processor, a functional chip and adetection system of the address bus. The invention realizes the accurate detection on faults of the non-memory functional chip and has the characteristics of simple process, high efficiency and shortdetection time for the detection method.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method, device and system for detecting an address bus. Background technique [0002] In order to improve the reliability of communication electronic products, it is usually necessary to detect the bus, mainly including the detection of data bus, control bus and address bus. Among them, for the address bus, since the address information is the one-way output information sent by the central processing unit (Central Processing Unit; hereinafter referred to as: CPU) to the external function module, it is impossible to pass the consistency of writing data and reading data. To accurately judge the short circuit or open circuit of the chip pin. Usually, the CPU of the system needs to detect its external function modules to realize the detection of the address bus. External function modules generally include memory and non-memory functional chips. At present, the detection met...

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Problems solved by technology

[0004] However, in the process of realizing the present invention, the inventor has found that there are at least the following problems in the prior art: when the address accessed by the CPU fails, the actual address when writing data is different from the actual address when reading data through the detection method of the prior art. The actual address is actually the same, so the judgment result is that the read data is equal to the written data, which cannot accurately detect the fault of the address bus

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