Optimising Flash Memory for Differing Usage Scenarios: Goals and Approach

Abstract

Non-volatile memories, particularly Flash memory, are becoming increasingly important commercially. In contrast with hard disk drives, they possess valuable advantages such as quieter operation, lower access latency, lower power consumption and the production of less heat. At the same time, however, the electronic device on which Flash memory is based, the floating gate transistor, has a limited operating lifetime. As a result, the ability of Flash memory chips to retain information when powered off needs to be balanced against their ability to be repeatedly programmed. This provides an opportunity to optimise the chips’ control parameters to adjust the chips’ operation to fit their desired operating scenarios, thereby resulting in a saving for both manufacturers and users.