Storing a Single Bit

Flash chips are designed to store one or more bits in a single transistor; the level of charge trapped within the transistor is mapped to a binary value. In a single-level cell (SLC) flash, only a single bit is stored within a transistor (i.e., 1 or 0). With a multi-level cell (MLC) flash, two bits are encoded into different levels of charge, e.g., 00, 01, 10, and 11 are represented by low, ...