Memory Buffer Operations for Write Performance and Read Window Margin

The patent applies preliminary action by storing second and third page data in a buffer during the first pass programming operation, before the actual programming of those pages is required. This advance preparation eliminates the need for repeated I/O operations during the second pass, thereby maintaining the read window margin benefits of two-pass programming while reducing the overall write time by preventing future I/O overhead.

The patent implements continuity of useful action by overlapping the data input phase with the programming phase. Specifically, while the controller is programming first page data to the memory array, it simultaneously stores second and third page data into the buffer. This parallel execution eliminates idle time and ensures that the system continuously performs useful work throughout the programming process, thereby reducing total write time without compromising read window margin.

The patent applies segmentation by dividing the programming operation into distinct passes: a first pass that programs first page data while buffering second and third page data, and a second pass that programs the buffered data. This segmentation allows the system to maintain the read window margin benefits of multi-pass programming while optimizing write performance through efficient buffer management and reduced I/O overhead in subsequent passes.

The patent uses the buffer as an intermediary component between the controller and the memory array. The buffer temporarily holds second and third page data during the first pass programming operation, acting as a mediator that decouples the data input process from the programming process. This intermediary enables the controller to maintain high write performance while ensuring that data is properly prepared for subsequent programming passes, thereby preserving read window margin.