IS43LR32200B Datasheet, PDF (19/42 Pages) Integrated Silicon Solution, Inc – 512K x 32Bits x 4Banks Mobile DDR SDRAM

IS43/46LR32200B
Table8 : Current State BANKn Truth Table (COMMAND TO BANK m)
Current State
Command
/CS
/RAS /CAS
/WE
Description
Action
H
X
X
X
DESELECT(NOP) Continue previous Operation
Any
L
H
H
H
NOP
Continue previous Operation
Idle
X
X
X
X
ANY
Any command allowed to bank m
L
L
H
H
ACTIVE
Activate Row
Row Activating, Active,
L
H
L
H
READ
or Precharging
L
H
L
L
WRITE
Start READ burst
Start WRITE burst
L
L
H
L
PRECHARGE
Precharge
L
L
H
H
ACTIVE
Activate Row
Read with Auto Precha
L
H
L
H
READ
rge disabled
L
H
L
L
WRITE
State READ burst
Start WRITE burst
L
L
H
L
PRECHARGE
Precharge
L
L
H
H
ACTIVE
Activate Row
Write with Auto
L
H
L
H
READ
precharge disabled
L
H
L
L
WRITE
Start READ burst
Start WRITE burst
L
L
H
L
PRECHARGE
Precharge
L
L
H
H
ACTIVE
Activate Row
Read with Auto
Precharge
L
H
L
H
READ
L
H
L
L
WRITE
Start READ burst
Start WRITE burst
L
L
H
L
PRECHARGE
Precharge
L
L
H
H
ACTIVE
Activate Row
Write with Auto
precharge
L
H
L
H
READ
L
H
L
L
WRITE
Start READ burst
Start WRITE burst
L
L
H
L
PRECHARGE
Precharge
Note
8
8
8
8,10
8,9
8
5,8
5,8,10
5,8
5,8
Rev. A | Feb. 2013
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