W9725G6KB-25I【PDF 34/87 页】IC DDR2 SDRAM 256MBIT 84WBGA

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W9725G6KB

Function Truth Table, continued

CURRENT

STATE

Read with

Auto-

precharge

Write with

Auto-

precharge

Precharge

Row

Activating

CS

H

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

H

L

L

L

L

L

L

L

RAS

X

H

H

H

L

L

L

L

X

H

H

H

L

L

L

L

X

H

H

H

L

L

L

L

X

H

H

H

L

L

L

L

CAS

X

H

L

L

H

H

L

L

X

H

L

L

H

H

L

L

X

H

L

L

H

H

L

L

X

H

L

L

H

H

L

L

WE

X

H

H

L

H

L

H

L

X

H

H

L

H

L

H

L

X

H

H

L

H

L

H

L

X

H

H

L

H

L

H

L

ADDRESS

X

X

BA, CA, A10

BA, CA, A10

BA, RA

BA, A10

X

Op-Code

X

X

BA, CA, A10

BA, CA, A10

BA, RA

BA, A10

X

Op-Code

X

X

BA, CA, A10

BA, CA, A10

BA, RA

BA, A10

X

Op-Code

X

X

BA, CA, A10

BA, CA, A10

BA, RA

BA, A10

X

Op-Code

COMMAND

DSL

NOP

READ/READA

WRIT/WRITA

ACT

PRE/PREA

REF/SELF

MRS/EMRS

DSL

NOP

READ/READA

WRIT/WRITA

ACT

PRE/PREA

REF/SELF

MRS/EMRS

DSL

NOP

READ/READA

WRIT/WRITA

ACT

PRE/PREA

REF/SELF

MRS/EMRS

DSL

NOP

READ/READA

WRIT/WRITA

ACT

PRE/PREA

REF/SELF

MRS/EMRS

ACTION

Continue burst to end

Continue burst to end

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

Continue burst to end

Continue burst to end

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

NOP-> Idle after t RP

NOP-> Idle after t RP

ILLEGAL

ILLEGAL

ILLEGAL

NOP-> Idle after t RP

ILLEGAL

ILLEGAL

NOP-> Row active after t RCD

NOP-> Row active after t RCD

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

ILLEGAL

NOTES

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Publication Release Date: Sep. 03, 2012

- 34 -

Revision A03

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