Memory Update via MLC-SLC Mode Switching and Buffer Swapping

The memory system is segmented into two distinct memory types: MLC memory for update operations and SLC memory for reliable storage. This segmentation allows each memory type to be optimized for its specific function, with MLC handling the high-write update process and SLC providing reliable long-term storage, thereby resolving the contradiction between simplicity and reliability.

MLC memory acts as an intermediary during the update process. Data is first written to MLC memory which can handle high write/erase cycles, then verified and copied to SLC memory for permanent storage. This intermediary approach protects the final storage from the wear and reliability issues of frequent write operations.

The update process is segmented into two phases: first writing to MLC memory for efficient bulk operations, then copying verified data to SLC memory. This segmentation allows MLC to handle the productivity-demanding write operations while SLC ensures reliability for the final stored data.

Data is preliminarily written and verified in MLC memory before being copied to SLC memory. This preliminary action in MLC allows for efficient update operations with the ability to verify data integrity before committing to the final storage, preventing unreliable data from being permanently stored.

The buffer block serves multiple functions: it temporarily holds data during updates, stores verification information, and acts as a transition area between MLC and SLC operations. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall system complexity.

The buffer block is merged with the existing memory architecture rather than being implemented as a completely separate system. The update process merges the write operation in MLC with the verification and copy operations involving the buffer and SLC, creating an integrated flow that manages complexity through unified process design.