MemoryChips

^{Two ways of organizing a 4 -Mbit memorychip.}

*- D

АО »-
А1 *-
А2 *~
A3 >-А4 «-
А5 *-		-" *- D1
А6 Ь~ А7 *-	512К 3 В	- *- D2
А8 -	Memory	-• ^ D3
АЭ *-А1О »-	chip
А11 «*	(4 Mbit)	■* ^ D5
А12 р-А13 »-		-" *- D6
А14 »-		-| »- D7
А15 *-
А16 *-
А17 к-
А18 +■

_ITT

CS WE OE (a)

_Г

CS WE OE

Слайд 37

MemoryChips

^{Two ways of organizing a 512 Mbit memorychip.}

АО -		-* DO Ao ^
А1 *-		_ A1 ^~
А2 ^		" A2 *-
A3 *-		D2 A3 ^
А4 *■
А5 »-		° ^ ^ A5 —-
А6	32М5 16	** *- D4 A6 ^	128M 3 4
А8 >-	Memory	дд ^	Memory
А9 **	chip	"*" ^" A9 и-	chip
А10 »>■		*- D7 A10 ^
А11 »-	(512 Mbit)	_, p. QQ A1 1 *-	(512 Mbit)
А12 *-		-+ k-09 A12 ^
RAS ^		| \ p]° RAS
CAS *-		-* *-D12 CAS *-
BankO •-		"* *"n^ BankO *-
Bank 1 *-		"* *^LJi4 Bank 1 »-
	t t t		t t t
	CS WE OE		CS WE OE
	(a)		(b)

Слайд 38

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Микросхемы памяти

RAS CAS WE OE CS

Синхронизация и управление

Усилители

считывания/

записи

Nonvolatile Memory Chips

A comparison of various memory types.

Type

Category

Erasure

Byte alterable

Volatile

Typical use

SRAM

Read/write

Electrical

Yes

Yes

Level 2 cache

DRAM

Read/write

Electrical

Yes

Yes

Main memory (old)

SDRAM

Read/write

Electrical

Yes

Yes

Main memory (new)

ROM

Read-only

Not possible

No

No

Large volume appliances

PROM

Read-only

Not possible

No

No

Small volume equipment

EPROM

Read-mostly

UV light

No

No

Device prototyping

EEPROM

Read-mostly

Electrical

Yes

No

Device prototyping

Flash

Read/write

Electrical

No

No

Film for digital camera

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Слайд 4)

CacheMemory

Cache

Main

memory

Bus

The cache is logically between the CPU and main memory. Physically, there are several possible places it could be located

Слайд 41

Memory Packaging and Types

111111111111111111111111111111111111111111111111111-*-

32-MB

memory

chip

Connector

A single inline memory module (SIMM) holding 256 MB. Two of the chips control the SIMM.

Слайд 42

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Структурная и функциональная организация ЭЕМ (ComputerOrganization and Design )

БГ7ИР кафедра ЗЕМ

доцент Сам ал ь Дм три й Иванович

т.284 -21 -61, dmitry _samal @mail. iu ,

a.502 -5

Лекция 13 «Организация памяти -П»

2007

_{План лекции}