摘要:
A method of programming a memory array including a plurality of memory cells is provided. The memory cells may include phase-change memory elements. In one aspect, the method includes applying in succession first through nth current pulses to each of the memory cells to be programmed to a first state (e.g., a crystalline state), where a current amplitude of the first through nth current pulses decreases with each successive pulse, and where a pulse duration of the first through nth current pulses increases with each successive pulse.
摘要:
A method of programming a memory array including a plurality of memory cells is provided. The memory cells may include phase-change memory elements. In one aspect, the method includes applying in succession first through nth current pulses to each of the memory cells to be programmed to a first state (e.g., a crystalline state), where a current amplitude of the first through nth current pulses decreases with each successive pulse, and where a pulse duration of the first through nth current pulses increases with each successive pulse.
摘要:
A semiconductor memory device of one aspect includes a memory cell block including n global word lines, and corresponding m sub word lines for each of the n global word lines, where n and m are natural numbers. The memory device further includes a plurality of word line driving circuits which respectively control a voltage of the sub word lines according to a logic level of each corresponding global word line and inputted address signals, and a plurality of control circuits which transmit the address signals to the word line driving circuits or interrupt transmission of the address signals according to the logic level of the global word line. Each of the word line driving circuits includes a first transistor which maintains the voltage of the respective sub word line at a first voltage and a second transistor which maintains the voltage of the sub word line at the first voltage or a second voltage.
摘要:
A method of operating a phase change random access memory (PRAM) device comprises performing a program operation to store data in selected PRAM cells of the device, wherein the program operation comprises a plurality of sequential program loops. The method further comprises suspending the program operation in the middle of the program operation, and after suspending the program operation, resuming the program operation in response to a resume command.
摘要:
A semiconductor memory device includes a plurality of wordline driving circuits adapted to control the voltage level of a sub-wordline in response to a logic state of a global wordline and an address signal. The wordline driving circuit comprises first and second transistors configured to maintain the sub-wordline at a first voltage level when the global wordline and the address signal have a first logic state and at a second voltage level when the global wordline or the address signal have a second logic state.
摘要:
A method of performing a program-suspend-read operation in a PRAM device comprises programming a write block comprising N unit program blocks in response to a program operation request, and suspending the program operation after programming M unit program blocks, where M is less than N, in response to a read operation request. The method further comprises executing the requested read operation, and then resuming the programming of the write data block and programming (N−M) remaining unit program blocks.
摘要:
A magnetic random access memory (MRAM), and a memory module, memory system including the same, and method for controlling the same are disclosed. The MRAM includes magnetic memory cells configured to change between at least two states according to a magnetization direction, and a mode register supporting a plurality of operational modes.
摘要:
A semiconductor memory device of one aspect includes a memory cell block including n global word lines, and corresponding m sub word lines for each of the n global word lines, where n and m are natural numbers. The memory device further includes a plurality of word line driving circuits which respectively control a voltage of the sub word lines according to a logic level of each corresponding global word line and inputted address signals, and a plurality of control circuits which transmit the address signals to the word line driving circuits or interrupt transmission of the address signals according to the logic level of the global word line. Each of the word line driving circuits includes a first transistor which maintains the voltage of the respective sub word line at a first voltage and a second transistor which maintains the voltage of the sub word line at the first voltage or a second voltage.
摘要:
A method of performing a program-suspend-read operation in a PRAM device comprises programming a write block comprising N unit program blocks in response to a program operation request, and suspending the program operation after programming M unit program blocks, where M is less than N, in response to a read operation request. The method further comprises executing the requested read operation, and then resuming the programming of the write data block and programming (N−M) remaining unit program blocks.
摘要:
A method of operating a phase change random access memory (PRAM) device includes performing a program operation to store data in selected PRAM cells of the device, wherein the program operation comprises a plurality of sequential program loops. The method further comprises suspending the program operation in the middle of the program operation, and after suspending the program operation, resuming the program operation in response to a resume command.