摘要:
A function selection circuit includes a first signal generating circuit for generating a plurality of first signals corresponding to each of all combinations of a plurality of input signal states; and a second signal generating circuit for selecting a plurality of logical sums of combinations of the plurality of first signals and generating a second signal corresponding to each of the plurality of logical sums which selectively activates an operation function indicated by a truth table.
摘要:
This invention provides a multiport memory including a storage section A having bit lines BL and BL, a word line WL, a data transfer gate .phi.DT, and a dynamic memory cell Cs, and a serial port B having a serial access function in a column direction of the storage section, wherein the memory includes a circuit for disabling a word line signal WL for selecting one word line under the conditions that a row address strobe signal RAS is raised in a transfer cycle in which data held by the memory cell is transferred to the serial port, and that the data transfer to the serial port is completed by the data transfer gate .phi.DT.
摘要:
In this invention, in a sensing circuit of a dynamic memory, barrier transistors are provided between the bit lines and the sensing amplifier. A circuit is provided that, on sensing and on data transfer, changes the gate potential of the barrier transistors so that during the sensing operation the barrier transistors are temporarily turned OFF, so that sensing can be carried out with high sensitivity, as the sensing system is not affected by the parasitic capacitance of the bit lines, while, on data transfer to the input/output lines, the gate potential of the barrier transistors is raised to a level greater than a value reached by adding the threshold value of the MOS transistors to the power source voltage, so that the conductance of the barrier transistors is increased, thereby speeding up the presensing of the input/output lines in the sensing circuit.
摘要:
A semiconductor device, a semiconductor memory tester, and a multi-chip package are provided. The semiconductor device includes a plurality of nonvolatile semiconductor memories; a boosting circuit which generates a boosted voltage for operating the plurality of nonvolatile semiconductor memories; and a boosting circuit controller which controls the operation of the boosting circuit to generate the boosted voltage on the basis of an operation sequence of the plurality of nonvolatile semiconductor memories.
摘要:
A semiconductor device, a semiconductor memory tester, and a multi-chip package are provided. The semiconductor device includes a plurality of nonvolatile semiconductor memories; a boosting circuit which generates a boosted voltage for operating the plurality of nonvolatile semiconductor memories; and a boosting circuit controller which controls the operation of the boosting circuit to generate the boosted voltage on the basis of an operation sequence of the plurality of nonvolatile semiconductor memories.
摘要:
A method of programming a non-volatile memory device with memory cells formed of variable resistance elements and disposed between word lines and bit lines, includes: previously charging a selected word line and a selected bit line together with a non-selected word line and a non-selected bit line up to a certain voltage; and further charging the selected word line and the non-selected bit line up to a program voltage higher than the certain voltage and a program-block voltage, respectively, and simultaneously discharging the selected bit line.
摘要:
A semiconductor device, a semiconductor memory tester, and a multi-chip package are provided. The semiconductor device includes a plurality of nonvolatile semiconductor memories; a boosting circuit which generates a boosted voltage for operating the plurality of nonvolatile semiconductor memories; and a boosting circuit controller which controls the operation of the boosting circuit to generate the boosted voltage on the basis of an operation sequence of the plurality of nonvolatile semiconductor memories.
摘要:
A layout-data generation equipment includes a logic circuit designing section which designs a logic circuit based on information of the specifications of a semiconductor integrated circuit, a layout-data generation section which creates layout-data based on the logic circuit, a resistance information extraction section which extracts resistance information of a wire from the layout-data, a circuit simulation execution section which executes a circuit simulation, an identification section of current direction which identifies a direction of a current in the wire based on the resistance information of a wire and an execution result of the circuit simulation, a verification section which verifies whether layout-data of the wire breaks a design rule, the design rule being extracted from the information of the specifications of a semiconductor integrated circuit and the verification section generates this verification result, and a data output section which outputs the layout-data.
摘要:
According to one embodiment, a nonvolatile memory device includes: a memory cell array including memory cells each having a variable resistance element for nonvolatilely storing data identified by an electrically rewritable resistance value; a first data latch storing write and erase data to be written on a given group of memory cells of the memory cell array for a write and erase operation; and a second data latch storing reference data for performing a compensation operation of the given group to compensate write and erase disturbance accompanied by the write or erase operation.
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.