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    • 4. 发明申请
    • メモリシステム及びメモリカード
    • 存储系统和存储卡
    • WO2003060722A1
    • 2003-07-24
    • PCT/JP2002/000025
    • 2002-01-09
    • 株式会社日立製作所堀井 崇史吉田 敬一野副 敦史
    • 堀井 崇史吉田 敬一野副 敦史
    • G06F12/00
    • G11C16/32G06F13/1647G11C7/1042G11C7/1045G11C16/10G11C2216/14
    • A memory system comprises nonvolatile memory chips CHP1, CHP2 having memory banks BNK1, BNK2 capable of performing memory operations independently and a memory controller 5 capable of accessing/controlling separately the nonvolatile memory chips. The memory controller can selectively instruct the memory banks of the nonvolatile memory chips to perform a simultaneous or interleave write operation. Therefore, the simultaneous write operations each requiring a write time much longer than the write set-up time can be completely parallel carried out, and the interleave write operations following the write set-up can be carried out parallel and overlapped with a write operation of another memory bank. As a result, the number of nonvolatile memory chips constituting a memory system capable of performing a high-speed write operation can be relatively small.
    • 存储器系统包括具有独立执行存储器操作的存储器组BNK1,BNK2的非易失性存储器芯片CHP1,CHP2以及能够单独访问/控制非易失性存储器芯片的存储器控​​制器5。 存储器控制器可以选择性地指示非易失性存储器芯片的存储体执行同时或交错写入操作。 因此,可以完全并行地执行需要比写入建立时间长得多的写入时间的同时写入操作,并且可以并行执行写入建立之后的交错写入操作,并且与写入操作重叠 另一个记忆库。 结果,构成能够执行高速写入操作的存储器系统的非易失性存储器芯片的数量可以相对较小。
    • 8. 发明申请
    • 不揮発性半導体記憶装置
    • 非易失性半导体存储器件
    • WO2003073433A1
    • 2003-09-04
    • PCT/JP2002/001847
    • 2002-02-28
    • 株式会社 日立製作所株式会社日立超エル・エス・アイ・システムズ高瀬 賢順倉田 英明吉田 敬一金光 道太郎
    • 高瀬 賢順倉田 英明吉田 敬一金光 道太郎
    • G11C16/34
    • G11C16/26G11C11/5628G11C11/5642G11C16/24
    • A nonvolatile semiconductor memory device in which data can be written at high speed in a Y direct circuit of a one-sense latch circuit plus two-SRAM structure. In a write mode in which data is written from the low voltage side, a write operation and an erratic judgment are carried out after transfer of data from an SRAM to a sense latch in the case of "10" and "00" distributions, data is written after a "01" distribution data transfer, a disturbance judgment and a simple upper-skirt judgment are carried out in order after a "11" distribution data transfer. Especially, 1 data is written from the low voltage side of the threshold voltage distribution of a multivalue memory, and 2 a "write operation" and an "upper-skirt judgment" are continuously carried out for every threshold voltage distribution. As a result, the threshold voltages of all the memory cells are lower than the upper-skirt judgment voltages of the "10" and "00" distributions after the write of the "10" and "00" distribution. Therefore, the write data is not required to be transferred because no masking processing for the other threshold voltage distributions is carried out in the upper-skirt judgment.
    • 一种非易失性半导体存储器件,其中数据可以在单触发电路的Y直接电路加上两个SRAM结构的高速写入。 在从低电压侧写入数据的写入模式下,在“10”和“00”分布的情况下,从SRAM向读出锁存器传送数据之后,执行写入操作和不稳定判断,数据 在“01”分发数据传送之后写入,在“11”分发数据传送之后依次执行干扰判断和简单的上裙裙判断。 特别地,从多值存储器的阈值电压分布的低电压侧写入1个数据,并且对于每个阈值电压分布,连续执行“写入操作”和“上部裙边判断”。 结果,在写入“10”和“00”分布之后,所有存储单元的阈值电压低于“10”和“00”分布的上裙部判断电压。 因此,不需要传送写入数据,因为在上裙部判断中不进行其他阈值电压分布的掩蔽处理。