NAND深入解析----------免费

NAND深入解析[1]Confidential

TET JJ 2005

What’s NAND Flash
Toshiba Electronics Taiwan Co., JJ Tsai () 2005

Confidential

TET JJ 2005

NOR vs NAND system interface

System Bus

/CE /OE /WE STS(R/B) /Reset /BYTE

A0-A22

NOR Flash

System Bus

/CE /RE /WE R/BY ALE CLE /WP

NAND Flash ADQ0-ADQ7

DQ0-DQ15

Confidential

NAND / NOR Characteristics
NAND NOR
~ 128Mbit 2.3-3.6V x8/x16
70ns(30pF, 2.3V) 65ns(30pF, 2.7V)

TET JJ 2005

Capacity Power Supply I/O Access Time Program Speed (typ.) Erase Speed(typ.)
Prog+Erase(typ.)

~ 1Gbit (2chips/pkg) 2.7-3.6V x8
50ns(serial access cycle) 25s(random access)

8s/Byte 200s/512Byte 2ms/Block (16KB) 33.6ms / 64KB 4.1ms/512Byte 700ms/Block 1.23s/Block (main:64KB)

Confidential

What’s the Flash ?

TET JJ 2005

Flash has a floating gate inside the Transistor ,the float