H5DU2562GFR 查看數據表（PDF） - SK HYNIX

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H5DU2562GFR

256Mb DDR SDRAM

SK HYNIX 

H5DU2562GFR-xxx

SIMPLIFIED STATE DIAGRAM

Power

A p p lie d

Pow er

On

P re c h a rg

e

PREALL

MRS

EMRS

MRS

Id le

REFS

S e lf

R efresh

REFSX

REFA

A u to

R efresh

CKEH

CKEL

A c tive

Power

Down

ACT

CKEL

CKEH

W rite

W rite

W rite A

W rite A

W rite

Row

A c tive

Read

W rite A

Read A

Read

PRE

Read A

PRE

PRE

P recharg

e

Power

Down

B urst

S top

Read

Read

Read A

Read A

PRE

P recharg

e

PREALL

A u to m a tic S e q u e n c e

Comm and Sequence

P R E A L L = P re c h a rg e A ll B a n ks

M R S = M o d e R e g iste r S e t

E M R S = E xte n d e d M o d e R e g iste r S e t

R E F S = E n te r S e lf R e fre sh

R E F S X = E x it S e lf R e fre s h

R E F A = A uto R efresh

C K E L = E nter P o w er D o w n

C K E H = E xit P o w e r D o w n

A C T = A c tive

W rite A = W rite w ith A u to p re c h a rg e

R e a d A = R e a d w ith A u to p re c h a rg e

P R E = P recharge

Rev. 1.2 /Aug. 2011

10

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