摘要:
According to one embodiment, a semiconductor memory device includes a memory cell array including a plurality of memory cells, a first register configured to store data of the memory cells, and a sequence control circuit configured to control the memory cell array and the first register. In at least a data read operation of the memory cells, the sequence control circuit reads out, from the memory cell array, data including flag information representing whether the number of failed bits is in an allowable range.
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 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:
The present invention provides a method for writing data to a non-volatile memory device having first wirings and second wirings intersecting one another and memory cells arranged at each intersection therebetween, each of the memory cells having a variable resistive element and a rectifying element connected in series. According to the method, the second wirings are charged to a certain voltage not less than a rectifying-element threshold value, prior to a rise in a selected first wiring. Then, a selected first wiring is charged to a voltage required for writing or erasing, after which a selected second wiring is discharged.
摘要:
A non-volatile semiconductor memory device includes: a memory cell array having electrically rewritable and non-volatile memory cells arranged; a data register circuit configured to hold write data to be written into the memory cell array; and an address decode circuit configured to decode a write address signal and control the write data-loading in the data register circuit, the address decode circuit being settable in such a multiple selection mode that the same write data is loaded in multiple registers in the data register circuit in correspondence to multiple addresses.
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:
A resistance change memory device including memory cells arranged, the memory cell having a stable state with a high resistance value and storing in a non-volatile manner such multi-level data that at least three resistance values, R0, R1 and R2 (R0 ΔR2.
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 memory device has an internal step-down power generation circuit and a memory circuit. The internal step-down power generation circuit generates a first internal power supply voltage from an external power supply voltage in an active state, and generates a second internal power supply voltage different from the first internal power supply voltage from the external power supply voltage in a standby state. The memory circuit includes a cell array containing a nonvolatile memory cell and a sense amplifier detecting data read from the cell array. The sense amplifier is supplied with a voltage generated by the internal step-down power generation circuit as an internal power supply voltage.
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.