Zhongguancun online news: Many people are difficult to distinguish the types of NAND flash memory, so Samsung semiconductor officials conveniently posted a popular science.
Samsung Semiconductor officially said that according to the way the data is stored, NAND flash memory can be divided into four types: SLC (Single Level Cell, single-layer cell), MLC (Multi Level Cell, multi-layer cell), TLC (Triple Level Cell, three-layer cell) and QLC (Quadra LevelCell, four-layer cell).
In order to facilitate the understanding of the types and characteristics of NAND flash memory, we first need to understand the stored data and the spatial "cell" (Cell) where the data is stored. If data is considered "people", then the unit is a "small room in a semiconductor" meaning that the data is stored in the unit.
SLC is to store a data in a unit, the data is stored in the form of "1" or "0", the operation is simple, the error is small, the speed is fast, and it is relatively stable.
MLC is to store two data in a unit, the data storage form is "00, 01, 10, 11", the price is relatively cheap, but the data processing speed is slower.
The TLC stores three data in one cell, while the QLC stores four data in one cell. Although it is possible to store a large amount of data, due to the large amount of data stored in a unit, their data processing speed will be slower compared to SLC and MLC.
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