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Package system of memory unit

阅读:222发布:2021-12-11

专利汇可以提供Package system of memory unit专利检索,专利查询,专利分析的服务。并且PURPOSE: To make its possible for an external test equipment to test a memory circuit part perfectly by providing a selecting circuit between a memory control circuit and memory circuit part which are packaged on one scanning substrate.
CONSTITUTION: Input-line selecting ciricuit 14 sends input signal group Ar when selective signal input Sr is at L or input signal group Br when at H to its output Yr as shown by the truth value table. For this purpose, holding signal group Br at L in normal operation supplies a signal from memory control circuit part 6 to memory circuit part 7, which is put into operation. When a test is required, signal Sr is held at H and a signal from memory circuit test equipment 17 to testing plug 16, so that it will be transferred to memory circuit part 7. Consequently, a fault occurring in memory circuit part 7 can completely be tested.
COPYRIGHT: (C)1981,JPO&Japio,下面是Package system of memory unit专利的具体信息内容。

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