Dave Embedded Systems Axel ULite, Руководство по оборудованию

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AXEL ULite Hardware Manual v.1.0.2
Attribute NAND NOR
Read Speed Good
Tab. 7 : comparison
3.2.1.1 Write endurance
The write endurance of SLC floating-gate NOR flash is typically equal to
or greater than that of NAND flash, while MLC NOR and NAND flash
have similar endurance capabilities. Examples of endurance cycle ratings
listed in datasheets for NAND and NOR flash are provided.
Type of flash
memory Endurance rating
(Erases per block) Example(s) of flash
memory
SLC NAND 100,000 Samsung OneNAND
KFW4G16Q2M
MLC NAND 5,000 to 10,000 for
medium-capacity
applications;
1,000 to 3,000 for high-
capacity applications Samsung K9G8G08U0M
(Example for medium-
capacity applications)
TLC NAND 1,000 Samsung 840
SLC (floating-gate)
NOR 100,000 to 1,000,000 Numonyx M58BW
(Endurance rating of
100,000 erases per block);
Spansion S29CD016J
(Endurance rating of
1,000,000 erases per
block)
MLC (floating-gate)
NOR 100,000 Numonyx J3 flash
Tab. 8 : comparison
However, by applying certain algorithms and design paradigms such as
wear leveling and memory over-provisioning, the endurance of a storage
system can be tuned to serve specific requirements.
1
1 https://en.wikipedia.org/wiki/Flash_memory#Distinction_between_NOR_and_NAND_flash
August, 2019 20/65