SRAM chip address pin line short-circuit detection method

Abstract

The invention relates to SRAM chip fault detection, aims to solve the problem that in the prior art, an SRAM chip address pin line short-circuit fault cannot be quickly and precisely detected and positioned, and provides an SRAM chip address pin line short-circuit detection method. The method comprises the steps that according to arrangement characteristics of chip address pins, and a to-be-detected pin group which possibly has a short circuit among the address pins is listed; an initial address of an SRAM chip is obtained, and all relevant addresses corresponding to the to-be-detected pin group are determined; verification data different from data in the initial address is written into all the relevant addresses in sequence; the data in the initial address before the verification data iswritten and the data in the initial address after the verification data is written are compared; and if the data in the initial address is changed, it is determined that a short-circuit fault occurs among the pins at the corresponding relevant addresses in the to-be-detected pin group. Through the method, whether address pin lines have a short circuit can be detected, detection is high in speed and precise, and the detection efficiency of an SRAM is improved.

Description

technical field [0001] The present invention relates to a kind of SRAM chip line detection, more specifically, relates to a kind of SRAM chip address pin line short-circuit detection method. Background technique [0002] SRAM is an important component in the controller circuit. When the controller hardware leaves the factory, all components should be tested. Reading and writing a certain address of the SRAM can determine whether the SRAM chip is damaged and whether the data line is soldered. The application number is 201410848838.6 Chinese patent document discloses an existing detection method of SRAM, this method can only identify fault conditions such as poor soldering of SRAM chip pins such as unwelded or false soldering, and cannot detect short circuits between address pins ( Solder will adhere to adjacent pins). The application number is 201610298683.2. The Chinese patent document discloses another existing detection method of SRAM. This method requires external devic...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide a SRAM chip capable of quickly and accurately locating the short-circuited address pin of the SRAM chip for the problem that the short-circuit fault of the address pin of the SRAM chip cannot be quickly and accurately detected and located in the prior art Address pin wire short detection method

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