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……