EMD12164P Datasheet, PDF (4/45 Pages) Emerging Memory & Logic Solutions Inc – 512M: 32M x 16 Mobile DDR SDRAM

Device Operation
Simplified State Diagram
Preliminary
EMD12164P
512M: 32M x 16 Mobile DDR SDRAM
Power
applied
Power
On
DPDSX
Deep
Power
Down
Precharge
All Banks
MRS
EMRS
MRS
DPDS
Self
Refresh
REFS
REFSX
Idle
All banks
precharged
REFA
CKEL
Active
Power
Down
CKEH
ACT
CKEH
Precharge
Power
Down
CKEL
Row
Active
Burst
Stop
WRITE
WRITE
WRITEA
READ
BST
READA
Auto
Refresh
READ
WRITE
READ
READ
WRITEA
WRITE A
READA
PRE
PRE
PRE
READA
READ A
PRE
ACT = Active
BST = Burst Terminate
CKEL = Enter Power-Down
CKEH =Exit Power-Down
DPDS = Enter Deep Power-Down
DPDSX = Exit Deep Power-Down
Precharge
PREALL
EMRS = Ext. Mode Reg. Set
MRS = Mode Register Set
PRE = Precharge
PREALL = Precharge All Banks
REFA = Auto Refresh
REFS = Enter Self Refresh
Automatic Sequence
Command Sequence
REFSX = Exit Self Refresh
READ = Read w/o Auto Precharge
READA = Read with Auto Precharge
WRITE = Write w/o Auto Precharge
WRITEA = Write with Auto Precharge
4
Rev 0.0