HY5DU28422ETP Datasheet, PDF (16/35 Pages) Hynix Semiconductor – 128Mb DDR SDRAM

SIMPLIFIED STATE DIAGRAM
Power
A p p lied
Power
On
HY5DU28422ETP
HY5DU28822ETP
HY5DU281622ETP
P re c h a rg
e
PREALL
MRS
EM RS
MRS
Id le
REFS
S e lf
R efresh
REFSX
REFA
A uto
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 re c h a rg
e
Power
Down
B urst
S to p
Read
Read
Read A
Read A
PRE
P re c h a rg
e
PREALL
A uto m a tic S eq ue 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 s h
R E F S X = E xit S e lf R e fre sh
R E FA = A uto R efresh
C K E L = E nter P ow 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 recharg e
Rev. 0.3 /Apr. 2006
16