Patent ID: 8456886

Claim:
Phase-Change Memory (PCM) device comprising: a multi-phase data storage cell and another multi-phase data storage cell, each having at least a Set state and a Reset state; a heating component configured to write data to the storage cell by heating the data storage cell; another heating component configured to write data to the storage cell by heating the other data storage cell; and a memory interface coupled with the heating component configured to write data to the data storage cell and coupled with the other heating component configured to write data to the other data storage cell, the data being represented by one of the Set or the Reset states, wherein: a write Reset pulse is used to place the data storage cell in the Reset state; a write Set pulse determined substantially based on the write Reset pulse used to place the data storage cell in the Set state; another write Reset pulse is used to place the other data storage cell in the Reset state; and another write Set pulse determined substantially based on the other write Reset pulse is used to place the other data storage cell in the Set state.