read only memory
Post on 22-Dec-2015
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ROM and its peripherals
VDD VDDVDD VDD
C1 C2 C3 C4
R1 R2 R3 R4 C1 C2 C3 C4
R0
R1
R2
R3
1 0 0 0 0 1 0 1
0 1 0 0 0 0 1 1
0 0 1 0 1 0 0 1
0 0 0 1 0 1 1 00
1 1 1 1
0
0 0
0 0
0 0
C1 C2 C3 C4
VDD
R1 R2 R3 R4 C1 C2 C3 C4
0 1 1 1 0 1 0 1
1 0 1 1 0 0 1 1
1 1 0 1 1 0 0 1
1 1 1 0 0 1 1 0
1 1 1 1
R0
R1
R2
R3
0 0 0 00 000 0 0
VDD
VDD
VDD
VDD
NOR based row decoder0 0
1 1
00
A1A2
VDD
VDD
VDD
VDD
NOR based row decoder1 0
0 1
01
A1A2
VDD
VDD
VDD
VDD
NOR based row decoder0 1
1 0
10
A1A2
VDD
VDD
VDD
VDD
NOR based row decoder1 1
0 0
11
A1A2
Flash Memory Structure
Hot Electron injection orFowler-Nordheim tunneling mechanism
Read and Write Operation
NAND and NOR based Memory
Reading data of NAND memory cell
NOR based FLASH
NAND based FLASH
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