W9425G6DH 查看數據表（PDF） - Winbond

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W9425G6DH

4M × 4 BANKS × 16 BITS DDR SDRAM

Winbond 

W9425G6DH

Function Truth Table, continued

CURRENT

STATE

CS RAS CAS

H

X

X

L

H

H

L

H

H

Read with

Auto-

precharge

L

H

L

L

H

L

L

L

H

L

L

H

L

L

L

L

L

L

H

X

X

L

H

H

L

H

H

Write with

Auto-

precharge

L

H

L

L

H

L

L

L

H

L

L

H

L

L

L

L

L

L

H

X

X

L

H

H

L

H

H

L

H

L

Precharging

L

H

L

L

L

H

L

L

H

L

L

L

L

L

L

H

X

X

L

H

H

L

H

H

Row

Activating

L

H

L

L

H

L

L

L

H

L

L

H

L

L

L

L

L

L

WE ADDRESS

COMMAND

XX

DSL

HX

NOP

LX

BST

H BS, CA, A10 READ/READA

L BS, CA, A10 WRIT/WRITA

H BS, RA

ACT

L BS, A10

PRE/PREA

HX

AREF/SELF

L Op-Code

MRS/EMRS

XX

DSL

HX

NOP

LX

BST

H BS, CA, A10 READ/READA

L BS, CA, A10 WRIT/WRITA

H BS, RA

ACT

L BS, A10

PRE/PREA

HX

AREF/SELF

L Op-Code

MRS/EMRS

XX

DSL

HX

NOP

LX

BST

H BS, CA, A10 READ/READA

L BS, CA, A10 WRIT/WRITA

H BS, RA

ACT

L BS, A10

PRE/PREA

HX

AREF/SELF

L Op-Code

MRS/EMRS

XX

DSL

HX

NOP

LX

BST

H BS, CA, A10 READ/READA

L BS, CA, A10 WRIT/WRITA

H BS, RA

ACT

L BS, A10

PRE/PREA

HX

AREF/SELF

L Op-Code

MRS/EMRS

ACTION

Continue burst to end

Continue burst to end

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

Continue burst to end

Continue burst to end

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

NOP-> Idle after tRP

NOP-> Idle after tRP

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

Idle after tRP

ILLEGAL

ILLEGAL

NOP-> Row active after tRCD

NOP-> Row active after tRCD

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

NOTES

3

3

3

3

3

3

3

3

3

3

3

- 19 -

Publication Release Date:Nov. 20, 2007

Revision A7

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