W9412G6JH
8. OPERATION MODE
The following table shows the operation commands.
8.1 Simplified Truth Table
DEVICE
STATE
BA0,
BA1
A0-A9
,A11
SYM.
COMMAND
CKEn-1 CKEn DM(4)
A10
CS
RAS CAS
WE
ACT
Bank Active
Bank Precharge
Precharge All
Write
Idle(3)
Any(3)
Any
H
H
H
H
X
X
X
X
X
X
X
X
V
V
X
V
V
L
V
X
X
V
L
L
L
L
L
L
H
H
H
L
H
L
L
L
PRE
PREA
WRIT
H
L
L
Active(3)
H
Write with Auto-
precharge
WRITA
READ
READA
MRS
Active(3)
Active(3)
Active(3)
Idle
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
V
V
H
L
V
V
V
C
V
L
L
L
L
L
H
H
H
L
L
L
L
L
L
L
H
H
L
Read
Read with Auto-
precharge
V
H
C
V
Mode Register Set
L, L
H, L
Extended Mode
Register Set
EMRS
Idle
L
L
NOP
BST
No Operation
Any
Active
Any
H
H
H
H
X
X
X
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
H
H
X
L
H
H
X
L
H
L
Burst Read Stop
Device Deselect
Auto Refresh
DSL
H
L
X
H
AREF
Idle
Self Refresh
Entry
SELF
Idle
H
L
L
X
X
X
X
X
X
X
X
L
L
L
H
H
L
X
H
X
H
X
X
H
X
H
X
X
X
X
X
X
Idle (Self
Refresh)
SELEX
Self Refresh Exit
H
H
L
Power Down
Mode Entry
Idle/
PD
H
L
L
X
X
X
X
X
X
X
X
Active(5)
Any
(Power
Down)
H
Power Down
Mode Exit
PDEX
H
L
H
H
X
WDE
WDD
Data Write Enable
Data Write Disable
Active
Active
H
H
X
X
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
Notes
1. V = Valid X = Don’t Care L = Low level H = High level
2. CKEn signal is input level when commands are issued.
CKEn-1 signal is input level one clock cycle before the commands are issued.
3. These are state designated by the BA0, BA1 signals.
4. LDM, UDM (W9412G6JH).
5. Power Down Mode can not entry in the burst cycle.
Publication Release Date: Nov. 29, 2011
Revision A03
- 17 -
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