摘要:
According to one embodiment, a semiconductor storage device includes a memory string, a bit line, a sense simplifier, a first MOS, a first charging-circuit, a second-charging circuit, and a controller. The memory string includes memory cells. The bit line is connected to the memory cell. The sense amplifier applies a voltage to the bit line. The first MOS is electrically connected between the sense amplifier and bit line. The first charging circuit has a first current supply capacity and transfers a first current. The second charging-circuit has a second current supply capacity. The controller controls a first timing to switch from the first current to the second current.
摘要:
A voltage generation circuit includes a pump circuit, a first unit, a first switch, and a first capacitor. The pump circuit generates a first voltage and outputs the first voltage to a first node. The first unit includes a first resistance unit to output a second voltage at a second node. The first switch connects the second node and an output terminal. A resistance value of a parasitic resistance formed in an interconnection from the second node to the output terminal is smaller than a resistance value of the first resistance unit. The first capacitor includes one of electrodes and the other electrodes. The one of electrodes is connected to an interconnection connecting the second node and the first switch element. The other of the electrodes is grounded. A capacitance of the first capacitor element is larger than a capacitance connected to the output terminal.
摘要:
According to one embodiment, a semiconductor memory includes a memory cell array including a plurality of memory cells, a sense amplifier circuit holding a verification result for the memory cells and including sense units, the sense units of each column block being connected in common to a first signal line, and a detecting circuit including a detecting unit. The detecting unit includes a first latch circuit which holds failure information in the memory cell arrays, and a second latch circuit which includes a first input terminal connected to the first signal line, a second input terminal connected to the first latch circuit, and a first output terminal connected to a second signal line.
摘要:
A nonvolatile semiconductor memory includes a memory cell array, bit lines, a first voltage generator, and a second voltage generator. The memory cell array includes memory cells. The bit lines each of which is connected electrically to one end of the current path of the corresponding one of the memory cells. The first voltage generator which is capable of supplying via a first output terminal to the bit lines a first voltage externally supplied or a third voltage which is obtained by stepping down a second voltage supplied and higher than the first voltage and which is as high as the first voltage. The second voltage generator which is capable of supplying a fourth voltage obtained by stepping down the second voltage to the bit lines via a second output terminal when the first voltage generator steps down the second voltage to generate the third voltage.
摘要:
According to one embodiment, a semiconductor storage device includes a memory string, a bit line, a sense simplifier, a first MOS, a first charging-circuit, a second-charging circuit, and a controller. The memory string includes memory cells. The bit line is connected to the memory cell. The sense amplifier applies a voltage to the bit line. The first MOS is electrically connected between the sense amplifier and bit line. The first charging circuit has a first current supply capacity and transfers a first current. The second charging-circuit has a second current supply capacity. The controller controls a first timing to switch from the first current to the second current.
摘要:
According to one embodiment, a semiconductor memory includes a memory cell array including a plurality of memory cells, a sense amplifier circuit holding a verification result for the memory cells and including sense units, the sense units of each column block being connected in common to a first signal line, and a detecting circuit including a detecting unit. The detecting unit includes a first latch circuit which holds failure information in the memory cell arrays, and a second latch circuit which includes a first input terminal connected to the first signal line, a second input terminal connected to the first latch circuit, and a first output terminal connected to a second signal line.
摘要:
A nonvolatile semiconductor memory includes a memory cell array, bit lines, a first voltage generator, and a second voltage generator. The memory cell array includes memory cells. The bit lines each of which is connected electrically to one end of the current path of the corresponding one of the memory cells. The first voltage generator which is capable of supplying via a first output terminal to the bit lines a first voltage externally supplied or a third voltage which is obtained by stepping down a second voltage supplied and higher than the first voltage and which is as high as the first voltage. The second voltage generator which is capable of supplying a fourth voltage obtained by stepping down the second voltage to the bit lines via a second output terminal when the first voltage generator steps down the second voltage to generate the third voltage.
摘要:
According to one embodiment, a semiconductor memory device includes a plurality of memory cells, a logic gate chain, and a counter. The memory cells are capable of retaining data and are associated with the columns. The logic gate chain includes a plurality of logic gates associated with the columns. Each of the logical gates outputs a logical level to a next-stage logical gate in the series connection. The logic level indicates presence or absence of verify-failure in the associated column. The counter counts the number of output times of the logic level indicating the presence of the verify-failure in a final-stage logic gate of the series connection. A content indicated by the logic level output from each of the logic gates is inverted at a boundary of the logic gate associated with the column having the verify-failure in the logic gate chain.
摘要:
According to one embodiment, a semiconductor memory device includes a plurality of memory cells, a logic gate chain, and a counter. The memory cells are capable of retaining data and are associated with the columns. The logic gate chain includes a plurality of logic gates associated with the columns. Each of the logical gates outputs a logical level to a next-stage logical gate in the series connection. The logic level indicates presence or absence of verify-failure in the associated column. The counter counts the number of output times of the logic level indicating the presence of the verify-failure in a final-stage logic gate of the series connection. A content indicated by the logic level output from each of the logic gates is inverted at a boundary of the logic gate associated with the column having the verify-failure in the logic gate chain.