HYB18M1G16 Datasheet, PDF (16/65 Pages) Qimonda AG – 1-Gbit x16 DDR Mobile-RAM

Data Sheet
2.3
State Diagram
HY[B/E]18M1G16[0/1]BF
1-Gbit DDR Mobile-RAM
Power
applied
Power
On
DPDSX
Deep
Power
Down
FIGURE 5
State Diagram
Precharge
All Banks
MRS
EMRS
MRS
DPDS
Self
Refresh
REFSX
REFS
Idle
All banks
precharged
REFA
CKEL
Active
Power
Down
CKEH
ACT
Precharge
Power
Down
CKEH
Auto
Refresh
CKEL
Row
Active
Burst
Stop
WRITE
WRITE
WRITE
WRITEA
READ
BST
READA
READ
READ
READ
WRITEA
WRITE A
READA
PRE
PRE
PRE
READA
READ A
PRE
Precharge
PREALL
Automatic Sequence
Command Sequence
ACT = Active
BST = Burst Terminate
CKEL = Enter Power-Down
CKEH = Exit Power-Down
DPDS = Enter Deep Power-Down
DPDSX = Exit Deep Power-Down
EMRS = Ext. Mode Reg. Set
MRS = Mode Register Set
PRE = Precharge
PREALL = Precharge All Banks
REFA = Auto Refresh
REFS = Enter Self Refresh
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
Note: Use caution with this diagram. It is indented to provide a floorplan of the possible state transitions and commands
to control them, not all details. In particular situations involving more than one bank are not captured in full detail.
Rev.1.0, 2007-03
16
10242006-Y557-TZXW