HY5DU12422BT_06 Datasheet, PDF (11/31 Pages) Hynix Semiconductor – 512Mb DDR SDRAM

1HY5DU12422B(L)T
HY5DU12822B(L)T
HY5DU121622B(L)T
SIMPLIFIED STATE DIAGRAM
Power
A p p lie d
Power
On
P re c h a rg
e
PREALL
MRS
EM RS
MRS
Id le
REFS
S elf
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 re c h a rg
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
Command 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 xit S e lf R e fre sh
R E FA = 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. 1.1 / Apr. 2006
11