Memory cell presetting for improved memory performance

摘要

Memory cell presetting for improved performance including a method for using a computer system to identify a region in a memory. The region includes a plurality of memory cells characterized by a write performance characteristic that has a first expected value when a write operation changes a current state of the memory cells to a desired state of the memory cells and a second expected value when the write operation changes a specified state of the memory cells to the desired state of the memory cells. The second expected value is closer than the first expected value to a desired value of the write performance characteristic. The plurality of memory cells in the region are set to the specified state, and the data is written into the plurality of memory cells responsive to the setting.

主权项

1. A method comprising:
using a computer system to identify a region in a phase change memory, the region comprising a plurality of memory cells characterized by a write performance characteristic that has a first expected value when a write operation changes a first current state of the memory cells to a desired state of the memory cells and a second expected value when a write operation changes a specified state of the memory cells to the desired state of the memory cells, wherein the second expected value is closer than the first expected value to a desired value of the write performance characteristic; setting the plurality of memory cells in the region to the specified state; and writing data into the plurality of memory cells responsive to the setting, wherein each of the memory cells consist of one of a SET state and a RESET state and wherein the desired state is selected to be either the RESET state or the SET state based on which state has a longer writer latency.