摘要:
A semiconductor integrated circuit device includes a memory cell array having a plurality of blocks, a storage unit, a block replacement information register group, and a bad block flag register group. The storage unit includes a block replacement information registration area with which it is possible to register block replacement information, and a bad block information registration area with which it is possible to register bad block information. The block replacement information register group is set in accordance with the block replacement information read out of the storage unit during a boot sequence, and the bad block flag register group is set in accordance with both of the block replacement information and the bad block information read out of the storage unit during the boot sequence.
摘要:
A semiconductor integrated circuit device includes a memory cell array having a plurality of blocks, a storage unit, a block replacement information register group, and a bad block flag register group. The storage unit includes a block replacement information registration area with which it is possible to register block replacement information, and a bad block information registration area with which it is possible to register bad block information. The block replacement information register group is set in accordance with the block replacement information read out of the storage unit during a boot sequence, and the bad block flag register group is set in accordance with both of the block replacement information and the bad block information read out of the storage unit during the boot sequence.
摘要:
A semiconductor memory device includes: a memory cell array, in which electrically rewritable and non-volatile memory cells are arranged; a sense amplifier circuit configured to be coupled to the memory cell array; a data transfer circuit disposed between the sense amplifier circuit and data input/output ports; a control signal generation circuit configured to generate a plurality of control signals based on a reference clock signal externally supplied, the control signals serving for controlling data input and output of the sense amplifier circuit and data transferring timing in the data transfer circuit; and an internal clock signal generation circuit configured to generate an internal clock signal based on the reference clock signal for serving as the basis of the control signals, the internal clock signal having the same clock cycle as the reference clock signal and a constant duty ratio without regard to the duty ratio of the reference clock signal.
摘要:
A semiconductor memory device includes: a memory cell array, in which electrically rewritable and non-volatile memory cells are arranged; a sense amplifier circuit configured to be coupled to the memory cell array; a data transfer circuit disposed between the sense amplifier circuit and data input/output ports; a control signal generation circuit configured to generate a plurality of control signals based on a reference clock signal externally supplied, the control signals serving for controlling data input and output of the sense amplifier circuit and data transferring timing in the data transfer circuit; and an internal clock signal generation circuit configured to generate an internal clock signal based on the reference clock signal for serving as the basis of the control signals, the internal clock signal having the same clock cycle as the reference clock signal and a constant duty ratio without regard to the duty ratio of the reference clock signal.
摘要:
A semiconductor memory device comprises a plurality of memory layers arranged in multilayer, each memory layer including a cell array, the cell array containing a plurality of first parallel lines, a plurality of second parallel lines arranged crossing the first lines, and a plurality of memory cells connected at intersections of the first lines and the second lines; a pulse generator operative to generate pulses required for data access to the memory cell; and a control means operative to control the pulse generator such that the pulse output from the pulse generator has energy in accordance with the memory layer to which the access target memory cell belongs.
摘要:
A semiconductor memory device comprises a plurality of memory layers arranged in multilayer, each memory layer including a cell array, the cell array containing a plurality of first parallel lines, a plurality of second parallel lines arranged crossing the first lines, and a plurality of memory cells connected at intersections of the first lines and the second lines; a pulse generator operative to generate pulses required for data access to the memory cell; and a control means operative to control the pulse generator such that the pulse output from the pulse generator has energy in accordance with the memory layer to which the access target memory cell belongs.
摘要:
A semiconductor memory device includes a memory cell array configured of at least a first portion and a second portion each including a plurality of memory cells each with a variable resistor which stores an electrically rewritable resistance value as a data, and a control circuit which controls a first operation including selected one of operations to erase, write and read the data in the first portion and a second operation including selected one of operations to erase, write and read the data in the second portion, the first operation and the second operation being performed in temporally overlapped relation with each other.
摘要:
A nonvolatile semiconductor storage device is disclosed, which includes a memory cell array in which nonvolatile memory cells are arranged, a first data holding circuit which temporarily holds a collective processing unit of read or write data to be simultaneously read from or written to the memory cells, a circuit which takes out the data held in the first data holding circuit from the device, and a second data holding circuit in which data is automatically set at a time when power supply is turned on and in which the data is changeable based on a command input to the device, wherein the collective processing unit is equal to a sum of the number of units used within the device and the maximum number of units continuously output from the device to outside or input to the device from outside.
摘要:
A nonvolatile semiconductor storage device includes a memory core that includes plural banks, the bank including plural memory cells and a data write circuit that supplies a bias voltage to the memory cell, the memory core being logically divided into plural pages, the page including a predetermined number of memory cells belonging to a predetermined number of banks; and a control circuit that controls the data write circuit to perform page write in each write unit including a predetermined number of memory cells, pieces of data being written in the page in the page write, the control circuit performing the page write by repeating a step including a program operation and a verify operation, the control circuit performing the program operation and the verify operation in a next step or later only to the write unit in which the data write is not completed in the verify operation.
摘要:
There is provided a non-volatile memory having electrically rewritable non-volatile memory cells arranged therein. A controller controls operation at the non-volatile memory. The non-volatile memory comprises a status output section configured to output status information indicating a status of read operation, write operation or erase operation in the non-volatile memory cell. The controller comprises a control signal generating section configured to output a control signal for a certain operation in the non-volatile memory, and a control signal switching section configured to instruct the control signal generating section to switch the control signal based on the status information.