M13S32321A_08 Datasheet, PDF (33/50 Pages) Elite Semiconductor Memory Technology Inc. – 256K x 32 Bit x 4 Banks Double Data Rate SDRAM

ESMT
M13S32321A
Power
Applied
Power
On
Precharge
PREALL
MRS
EMRS
MRS
REFS
Self
Refresh
REFSX
REFA
Id le
CKEL
CKEH
Aut o
Refresh
Active
ACT
Po we r
Down
CKEH
CKEL
Precharge
Power
Down
Write
W ri te
Write
Row
Active
Write A
Read
Read A
Read
Burst Stop
Read
Read
Write
A
PRE
PRE
R ea d
A
PRE
Read A
Read
A
PRE
Precharge
PREALL
Automatic Se quence
Command Sequence
PREALL = Precharge All Banks
MRS = Mode Register Set
EMRS = Extended Mode Register Set
REFS = Enter Self Refresh
REFSX = Exit Self Refresh
REFA = Auto Refresh
CLKEL = Enter Power Down
CKEH = Exit Power Down
ACT = Active
Write A = Write with Autoprecharge
Read A = Read with Autoprecharge
PRE = Precharge
Figure 7
SIMPLIFIED STATE DIAGRAM
Elite Semiconductor Memory Technology Inc.
Publication Date : Jul. 2008
Revision : 1.1
33/50