UPD4564323 查看數據表（PDF） - NEC => Renesas Technology

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产品描述 (功能)

比赛名单

UPD4564323

64M-bit Synchronous DRAM 4-bank, LVTTL

NEC => Renesas Technology 

µPD4564323 for Rev. E

4. Truth Table

4.1 Command Truth Table

Function

Device deselect

No operation

Burst stop

Read

Read with auto precharge

Write

Write with auto precharge

Bank activate

Precharge select bank

Precharge all banks

Mode register set

Symbol

DESL

NOP

BST

READ

READA

WRIT

WRITA

ACT

PRE

PALL

MRS

CKE

n–1

n

H

×

H

×

H

×

H

×

H

×

H

×

H

×

H

×

H

×

H

×

H

×

/CS /RAS /CAS /WE BA0,

BA1

H

×

×

×

×

L

H

H

H

×

L

H

H

L

×

L

H

L

H

V

L

H

L

H

V

L

H

L

L

V

L

H

L

L

V

L

L

H

H

V

L

L

H

L

V

L

L

H

L

×

L

L

L

L

L

Remark H = High level, L = Low level, × = High or Low level (Don't care), V = Valid data input

A10 A9 - A0

×

×

×

×

×

×

L

V

H

V

L

V

H

V

V

V

L

×

H

×

L

V

4.2 DQM Truth Table

Function

Symbol

C KE

D QM

n-1

n

0

1

2

3

Data write/output enable

ENB

H

×

L

Data mask/output disable

MASK

H

×

H

DQ0 - DQ7 write enable/output enable

ENB0

H

×

L

×

×

×

DQ8 - DQ15 write enable/output enable

ENB1

H

×

×

L

×

×

DQ16 - DQ23 write enable/output enable

ENB2

H

×

×

×

L

×

DQ24 - DQ31 write enable/output enable

ENB3

H

×

×

×

×

L

DQ0 - DQ7 write inhibit/output disable

MASK0

H

×

H

×

×

×

DQ8 - DQ15 write inhibit/output disable

MASK1

H

×

×

H

×

×

DQ16 - DQ23 write inhibit/output disable

MASK2

H

×

×

×

H

×

DQ24 - DQ31 write inhibit/output disable

MASK3

H

×

×

×

×

H

Remark H = High level, L = Low level, × = High or Low level (Don't care)

4.3 CKE Truth Table

Current state

Function

Symbol

CKE

/CS /RAS /CAS /WE Address

n–1 n

Activating

Clock suspend mode entry

H

L

×

×

×

×

×

Any

Clock suspend

L

L

×

×

×

×

×

Clock suspend

Clock suspend mode exit

L

H

×

×

×

×

×

Idle

CBR (auto) refresh command REF

H

H

L

L

L

H

×

Idle

Self refresh entry

SELF

H

L

L

L

L

H

×

Self refresh

Self refresh exit

L

H

L

H

H

H

×

L

H

H

×

×

×

×

Idle

Power down entry

H

L

×

×

×

×

×

Power down

Power down exit

L

H

H

×

×

×

×

L

H

L

H

H

H

×

Remark H = High level, L = Low level, × = High or Low level (Don't care)

Data Sheet M14376EJ2V0DS00

13

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