Development of Non-volatile Memories
Flash Memories
Solid State Drives
[ Structure of Solid State Drives ]
- DRAM/SRAM
- Register
- Processor
- Flash contoller
- Flash memory chips
(SLC, MLC, TLC, QLC)
Non-volatile RAMs
hard bit
soft bit
soft bit
hard bit
Soft bit translation
hard bit
soft bit
hard bit
soft bit
Hard bit translation
MLC STT-MRAM Bit Translation
[ NVRAM ]
- Byte addressable
- SLC/MLC PRAM
- SLC/MLC STT-MRAM
(Soft/hard bit translation cost)
- ReRAM
- 3D Xpoint
MLC STT-MRAM Structure
[ STT-MRAM ]
- Cell-split mapping
- Line swapping (LS)
- Line pairing (LP)
3D NAND Flash Memories
3D NAND Flash Structure
[ 3D NAND Flash Memory ]
- Read/write unit : page
- Erase unit : block
- Different read/write/erase speed
- High capacity, durability