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    • 83. 发明授权
    • Non-volatile semiconductor memory with large erase blocks storing cycle counts
    • 具有存储循环计数的大擦除块的非易失性半导体存储器
    • US07307881B2
    • 2007-12-11
    • US11004139
    • 2004-12-02
    • Jian ChenTomoharu Tanaka
    • Jian ChenTomoharu Tanaka
    • G11C16/06G11C16/04G11C29/00G06F12/00H03M13/00
    • G11C11/5635G06F11/1068G11C11/5621G11C16/0483G11C16/3427G11C16/3459G11C16/349G11C2211/5641G11C2211/5646
    • In a flash EEPROM system that is divided into separately erasable blocks of memory cells with multiple pages of user data being stored in each block, a count of the number of erase cycles that each block has endured is stored in one location within the block, such as in spare cells of only one page or distributed among header regions of multiple pages. The page or pages containing the block cycle count are initially read from each block that is being erased, the cycle count temporarily stored, the block erased and an updated cycle count is then written back into the block location. User data is then programmed into individual pages of the block as necessary. The user data is preferably stored in more than two states per memory cell storage element, in which case the cycle count can be stored in binary in a manner to speed up the erase process and reduce disturbing effects on the erased state that writing the updated cycle count can cause. An error correction code calculated from the cycle count may be stored with it, thereby allowing validation of the stored cycle count.
    • 在被分成具有存储在每个块中的多页用户数据的存储单元的单独可擦除块的快闪EEPROM系统中,每个块已经承受的擦除周期数的计数被存储在块内的一个位置中, 如在仅一页的备用单元中或分布在多页的标题区之间。 最初从被擦除的每个块读取包含块循环计数的页面,临时存储循环计数,擦除块,然后将更新的循环计数写回到块位置。 然后根据需要将用户数据编程到块的各个页面中。 用户数据优选地存储在每个存储器单元存储元件的多于两个状态中,在这种情况下,周期计数可以以加速擦除处理的方式以二进制存储,并且减少写入更新周期的擦除状态的干扰效应 计数可以造成。 可以与循环计数一起存储从周期计数中计算的纠错码,从而允许验证存储的循环计数。
    • 89. 发明申请
    • Non-Volatile Semiconductor Memory With Large Erase Blocks Storing Cycle Counts
    • 具有大擦除块的非易失性半导体存储器存储循环计数
    • US20060206770A1
    • 2006-09-14
    • US11419696
    • 2006-05-22
    • Jian ChenTomoharu Tanaka
    • Jian ChenTomoharu Tanaka
    • G11C29/00
    • G11C11/5635G06F11/1068G11C11/5621G11C16/0483G11C16/3427G11C16/3459G11C16/349G11C2211/5641G11C2211/5646
    • In a flash EEPROM system that is divided into separately erasable blocks of memory cells with multiple pages of user data being stored in each block, a count of the number of erase cycles that each block has endured is stored in one location within the block, such as in spare cells of only one page or distributed among header regions of multiple pages. The page or pages containing the block cycle count are initially read from each block that is being erased, the cycle count temporarily stored, the block erased and an updated cycle count is then written back into the block location. User data is then programmed into individual pages of the block as necessary. The user data is preferably stored in more than two states per memory cell storage element, in which case the cycle count can be stored in binary in a manner to speed up the erase process and reduce disturbing effects on the erased state that writing the updated cycle count can cause. An error correction code calculated from the cycle count may be stored with it, thereby allowing validation of the stored cycle count.
    • 在被分成具有存储在每个块中的多页用户数据的存储单元的单独可擦除块的快闪EEPROM系统中,每个块已经承受的擦除周期数的计数被存储在块内的一个位置中, 如在仅一页的备用单元中或分布在多页的标题区之间。 最初从被擦除的每个块读取包含块循环计数的页面,临时存储循环计数,擦除块,然后将更新的循环计数写回到块位置。 然后根据需要将用户数据编程到块的各个页面中。 用户数据优选地存储在每个存储器单元存储元件的多于两个状态中,在这种情况下,周期计数可以以加速擦除处理的方式以二进制存储,并且减少写入更新周期的擦除状态的干扰效应 计数可以造成。 可以与循环计数一起存储从周期计数中计算的纠错码,从而允许验证存储的循环计数。