August 2011
Intermediate to advanced
312 pages
12h 13m
English
Content preview from Digital Storage in Consumer Electronics
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78 Chapter 4
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4.4 Common Flash Memory Storage Technologies:
NOR and NAND
There are two kinds of fl ash memory, NOR and NAND. The two terms are names of
types of logic gates, the negated OR function and the negated AND function. The
big difference between the two types of architectures is real estate. NAND has a
signifi cantly smaller die size than does NOR. This translates to signifi cant cost
savings.
These cost savings come with a trade-off. NAND does not behave like other memories.
While NOR, SRAM, and DRAM are random access devices (the “RAM” part of
DRAM and SRAM stands for random access memory) NAND is part random and part ...
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