Abstract:
PURPOSE: A PRAM memory device, a memory system having the same, and a method of a programming PRAM memory device are provided to increase program efficiency by adjusting the number of applying a verification pulse and the interval of thereof. CONSTITUTION: In an PRAM memory device, a memory system having the same, and a method of a programming PRAM memory device, a write pulse is applied to phase-change memory cells. Write data is programmed in phase-change memory cells(S110) At least one verification pulse is applied to the phase-change memory cells. It is determined whether a phase-change memory cells is programmed or not(S120).
Abstract:
PURPOSE: A memory system is provided to increase operation speed by reducing the influence of a resistance drift of a resistance memory device and read out program information from a cache memory while programming data in a PRAM in a program mode. CONSTITUTION: A host(110) writes first data in a PRAM(Phase Change Random Access Memory)(150). The host writes program information about the first data in a cache memory(140). The host reads out the program information about the first data from the cache memory instead of reading out the first data from the resistance memory device in program-to-active time.