Semiconductor Memory Classification

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Semiconductor Memory Classification Read-Write Memory Non-Volatile Read-Write Memory Read-Only Memory EPROM E 2 PROM FLASH Random Access Non-Random Access SRAM DRAM Mask-Programmed Programmable (PROM) FIFO Shift Register LIFO RAM - è un tipo di memoria volatile caratterizzata dal permettere l'accesso diretto a qualunque indirizzo di memoria con lo stesso tempo di accesso.

Transcript of Semiconductor Memory Classification

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Semiconductor Memory Classification

Read-Write MemoryNon-VolatileRead-Write

MemoryRead-Only Memory

EPROM

E2PROM

FLASH

RandomAccess

Non-RandomAccess

SRAM

DRAM

Mask-Programmed

Programmable (PROM)

FIFO

Shift Register

LIFO

RAM - è un tipo di memoria volatile caratterizzata dal permettere l'accesso diretto aqualunque indirizzo di memoria con lo stesso tempo di accesso.

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Row

Dec

oder

Bit line2L 2 K

Word line

AK

AK1 1

AL 2 1

A0

M.2K

AK2 1

Sense amplifiers / Drivers

Column decoder

Input-Output(M bits)

Storage cell

Array-Structured Memory Architecture

Amplify swing torail-to-rail amplitude

Selects appropriateword

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6-transistor CMOS SRAM Cell WL

BL

VDD

M5M6

M4

M1

M2

M3

BL

QQ

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Read-Only Memory Cells

WL

BL

WL

BL

1WL

BL

WL

BL

WL

BL

0

VDD

WL

BL

GND

Diode ROM MOS ROM 1 MOS ROM 2

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