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    • 2. 发明授权
    • 반도체 메모리 장치
    • 半导体存储器件
    • KR1019960011959B1
    • 1996-09-06
    • KR1019930016460
    • 1993-08-24
    • 미쓰비시덴키 가부시키가이샤
    • 후데야스요시오
    • G11C29/00
    • G11C29/14G11C29/28
    • A semiconductor memory device capable of storing a plurality of bits at the same address and of reducing a test time without increasing the number of pins includes comparing circuits located between a plurality of memory cell blocks from which data at the same address is read, and an input/output pin used in ordinary operations for reading and writing data. The comparing circuits serve to detect coincidence and non coincidence of the data from the memory cell blocks and the pin. Preferably, there is provided a logic for superposing outputs of the comparing circuits. An error flag signal supplied from the superposing logic is transmitted through a no-connection pin, thereby reducing the number of pins.
    • 一种能够在相同地址存储多个位并且减少测试时间而不增加引脚数量的半导体存储器件包括位于读取同一地址处的数据的多个存储器单元块之间的比较电路, 在普通操作中用于读写数据的输入/输出引脚。 比较电路用于检测来自存储单元块和引脚的数据的一致性和不一致性。 优选地,提供了用于叠加比较电路的输出的逻辑。 从叠加逻辑提供的错误标志信号通过无连接引脚传输,从而减少引脚数量。