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