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    • 15. 发明授权
    • Integrated circuit memory devices having selectable column addressing and methods of operating same
    • 具有可选择列寻址的集成电路存储器件及其操作方法
    • US06438063B1
    • 2002-08-20
    • US09714302
    • 2000-11-16
    • Ho-Cheol Lee
    • Ho-Cheol Lee
    • G06F1206
    • G11C7/225G11C7/1018G11C7/1072G11C7/222G11C11/4076G11C11/408G11C11/4082G11C11/4087G11C2207/2281
    • A synchronous dynamic random access memory capable of accessing data in a memory cell array therein in synchronism with a system clock from an external system such as a central processing unit (CPU). The synchronous DRAM receives an external clock and includes a plurality of memory banks each including a plurality of memory cells and operable in either an active cycle or a precharge cycle, a circuit for receiving a row address strobe signal and latching a logic level of the row address strobe signal in response to the clock, an address input circuit for receiving an externally generated address selecting one of the memory banks, and a circuit for receiving the latched logic level and the address from the address input circuit and for outputting an activation signal to the memory bank selected by the address and an inactivation signals to unselected memory banks when the latched logic level is a first logic level, so that the selected memory bank responsive to the activation signal operates in the active cycle while the unselected memory banks responsive to the inactivation signals operate in the precharge cycle.
    • 能够与来自诸如中央处理单元(CPU)的外部系统的系统时钟同步地访问其中的存储器单元阵列中的数据的同步动态随机存取存储器。 同步DRAM接收外部时钟并且包括多个存储器组,每个存储器组包括多个存储器单元并且可以在有效周期或预充电周期中操作,用于接收行地址选通信号并锁存该行的逻辑电平的电路 响应于时钟的地址选通信号,用于接收选择存储体之一的外部产生的地址的地址输入电路,以及用于从地址输入电路接收锁存的逻辑电平和地址的电路,并将激活信号输出到 当锁存的逻辑电平是第一逻辑电平时,由地址选择的存储器组和对未选择的存储体的去激活信号,使得响应于激活信号的所选存储器组在活动周期中工作,而未被选择的存储器组响应于 灭活信号在预充电循环中工作。