摘要:
A non-volatile semiconductor memory device includes: a memory cell array in which electrically rewritable floating gate type memory cells are arranged; and a plurality of sense amplifier circuits configured to read data from the memory cell array, wherein each the sense amplifier circuit is configured to sense cell data of a first memory cell selected from the memory cell array under a read condition determined in correspondence with cell data of a second memory cell adjacent to the first memory cell and written after the first memory cell.
摘要:
A semiconductor memory device disclosed herein comprises a memory cell array in which memory cells are connected to word lines, a first voltage generating circuit which generates a first voltage, a second voltage generating circuit which generates a second voltage using the first voltage, a word line selecting circuit which selects at least one of the word lines, a word line voltage supplying circuit which supplies the second voltage to the selected word line through the word line selecting circuit, and a transfer voltage supplying circuit which supplies the first voltage to the word line selecting circuit and stops supplying it to be in a floating state before transferring the second voltage from the word line voltage supplying circuit to the selected word line, in an operation in which the second voltage is supplied to the selected word line after the first voltage is supplied to the word line selecting circuit.
摘要:
A non-volatile semiconductor memory includes a memory cell array having a plurality of electrically-rewritable non-volatile memory cells. The memory cell array is provided with an initially-setting data area, programmed in which is initially-setting data for deciding memory operation requirements. The non-volatile semiconductor memory also includes an initial-set data latch. The initially-setting data of the memory cell array is read out and transferred to the data latch in an initially-setting operation.
摘要:
A semiconductor memory device comprising a memory cell array and a word-line select circuit. The memory cell array having first to third word lines connected to first to third groups of memory cells, respectively. The second word lines are adjacent to the first word lines. The word-line select circuit selects at least one row of memory cells. The word-line select circuit includes first to third groups of word-line select transistors arranged in row and column directions. The first to third groups of word-line select transistors are connected to the first to third word line, respectively. The third group of word-line select transistors are each arranged interposed between any adjacent two of the first and second group of word-line select transistors.
摘要:
A semiconductor memory device comprises a memory cell array, a block select circuit, a plurality of word-line-driving-signal lines, and a plurality of transfer transistors. The memory cell array includes a plurality of blocks, each of the blocks including memory cells arranged in rows and columns. The block select circuit selects one of the blocks of the memory cell array. The word-line-driving-signal lines receive voltages to be applied to a plurality of word lines in each block. The transfer transistors are connected between the word-line-driving-signal lines and the word lines of the memory cell array, and are controlled by outputs from the block select circuit. Any two of the transfer transistors, which correspond to each pair of adjacent ones of the word lines, are separate from each other lengthwise and widthwise, and one or more transfer transistors corresponding to another word line or other word lines are interposed therebetween.
摘要:
A non-volatile semiconductor memory includes a memory cell array having a plurality of electrically-rewritable non-volatile memory cells. The memory cell array is provided with an initially-setting data area, programmed in which is initially-setting data for deciding memory operation requirements. The non-volatile semiconductor memory also includes an initial-set data latch. The initially-setting data of the memory cell array is read out and transferred to the data latch in an initially-setting operation.
摘要:
A control circuit provides an at least partially negative threshold voltage distribution to a memory cell, thereby erasing retained data of the memory cell, and provides multiple levels of positive threshold voltage distributions thereto, thereby programming multiple levels of data to the memory cell. The control circuit, when executing a program operation to the memory cell, executes a first program operation that provides the multiple levels of positive threshold voltage distributions to a first memory cell which is a memory cell subject to program, and executes a second program operation that provides a positive threshold voltage distribution, to a second memory cell adjacent to the first memory cell, irrespective of (regardless of) whether data to be programmed to the second memory cell is (already) present in the second memory cell or not.
摘要:
According to one embodiment, a semiconductor memory device includes a memory cells, a selection transistor, a memory string, a block, and a transfer circuit. The memory cells are stacked on a semiconductor substrate. In the memory string, the memory cells and the selection transistor are connected in series. The block includes a plurality of memory strings. In data write and read, the transfer circuit transfers a positive voltage to a select gate line associated with a selected memory string in a selected block, and a negative voltage to a select gate line associated with an unselected memory string in the selected block, and to a select gate line associated with an unselected block.
摘要:
A nonvolatile semiconductor memory device comprises a three-dimensional cell array block in which a plurality of cell array layers are stacked, each of the cell array layers including a plurality of first lines, a plurality of second lines configured to intersect the first lines, and a plurality of memory cells disposed at each of intersections of the first and second lines and each including a variable resistance element configured to store an electrically rewritable resistance value as data in a nonvolatile manner, and a reading control circuit for reading data from the memory cells under a condition set in respective groups to which one or more cell array layers having a common electric property of the memory cells belong.
摘要:
A semiconductor storage device includes a memory cell array including memory cells arranged at respective intersections between first wirings and second wirings. Each of the memory cells includes a rectifier element and a variable resistance element connected in series. A control circuit is configured to apply a first voltage to a selected first wiring and a second voltage lower than the first voltage to a selected second wiring so that a certain potential difference is applied to a selected memory cell positioned at an intersection between the selected first wiring and the selected second wiring. The control circuit performs a concurrent read operation to perform a read operation from plural memory cells concurrently by applying the first voltage to a plurality of the first wirings concurrently. It is possible to switch the number of the first wirings to be applied with the first voltage concurrently in the concurrent read operation.