Integrated circuit with flag register for block selection of nonvolatile
cells for bulk operations
    1.
    发明授权
    Integrated circuit with flag register for block selection of nonvolatile cells for bulk operations 失效
    具有标志寄存器的集成电路,用于批量操作的非易失性单元的块选择

    公开(公告)号:US5848026A

    公开(公告)日:1998-12-08

    申请号:US986506

    申请日:1997-12-08

    CPC分类号: G11C16/10

    摘要: Bulk operation logic circuitry for use in carrying out bulk program, erase, verify and margining operations on nonvolatile memory cells of a PLD, FPGA, flash-based microcontroller, EEPROM, flash memory device or other integrated circuit containing such cells includes a flag register for designating one or more selected blocks of cells to which the bulk operation will be limited. The bulk operation circuitry includes a controller, with a state machine and associated control logic, that distributes system clock signals and provides control signals to an instruction register, the flag register, an address register and one or more data registers to control loading of instructions and data into those registers through a serial input. The state machine is responsive to a mode signal for switching it from a normal user state into a bulk operation state. The use of a flag register allows simplification of the instruction set to register load instructions and basic bulk operation instructions (and a flow through operation using a serial output from the registers), while providing a wide variety of possible block selections for the different bulk operations.

    摘要翻译: 用于在PLD,FPGA,基于闪存的微控制器,EEPROM,闪速存储器件或包含这种单元的其它集成电路的非易失性存储器单元上执行批量编程,擦除,验证和裕度操作的批量操作逻辑电路包括:标志寄存器 指定将限制批量操作的一个或多个选定的单元块。 大容量操作电路包括具有状态机和相关联的控制逻辑的控制器,其分配系统时钟信号并向控制寄存器,标志寄存器,地址寄存器和一个或多个数据寄存器提供控制信号,以控制指令的加载,以及 通过串行输入将数据写入这些寄存器。 状态机响应于将模式信号从正常用户状态切换到大容量操作状态。 使用标志寄存器可以简化寄存器加载指令和基本批量操作指令(以及使用寄存器的串行输出的操作流程)的指令集,同时为不同的批量操作提供各种可能的块选择 。