Nand flash vs Nor flash

[vinod_g]

can u please tell me the differences between the Nor and Nand flash?

 

[Willt]

Hi friend,

a. What are the difference between Nor and NAND flash (architecture , advantage....)?

NOR flash
- core cells connected in parallel (common ground)
- adv. random access (good for code execution)
- adv. faster than NAND flash
- disadv. larger area than NAND flash with the same capacity

NAND flash
- core cells connected in series (normal 8 or 16 cells)
- adv. smaller than NOR flash with the same capacity (cos connected in series)
- disadv. slower than NOR flash (cos stack transistors)
- disadv. sequential access (good for data storage but not code execution)

b. Market share rank in NOR flash:
1st Spansion
2nd Intel
3rd STM

Hope it helps ~

Will

 

[umup]

Use Google:
https://en.wikipedia.org/wiki/Flash_memory
https://www.linuxdevices.com/articles/AT4422361427.html
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1) NAND flash have much more capacity, but slower and can have 'bad sectors', needs bad sector management (Multimedia, Smartmedia cards);
2) NOR flash faster, have parallel address/data buses, used mostly as 'BIOS' in microcontroller systems.

 

[archillios]

NAND Flash can be used as mass storage device in consumer electronic system, like hard disk in PC.

NOR Flash has no future, less vendor support this kind of Flash, for high cost when high density. Density is the most demanding feature of memory.

hope it help

 

[rosarioantony]

NOR FLASH - is like ROM memories
1.less storage capacity comapre to NAND
2.fast read
3.slow erase and write
4.requires external error detection
5.easy interfacing cktry

NAND Flash: - is like mass storage devices like hard disk
1,Huge storage capacity
2.slow in random access
3.fast erase and write
4.internal error detection provision
5.complex interface circuitry

https://www.webopedia.com/TERM/N/NOR.html
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[melc]

NAND are usually organised on 8 bit bus, while NOR on 16 bit bus.

 

[nathan_ruan]

who knows the nor flash memory layout ?