W9425G6JH_13 Datasheet, PDF (17/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
9. OPERATION MODE
The following table shows the operation commands.
9.1 Simplified Truth Table
SYM.
COMMAND
ACT
PRE
Bank Active
Bank Precharge
DEVICE
STATE
CKEn-1 CKEn
DM⁽⁴⁾
BA0,
BA1
A10
A12,
A11,
A9-A0
CS RAS
CAS
WE
Idle⁽³⁾
H
X
X
V
V
V
LL
H
H
Any⁽³⁾
H
X
X
V
L
X
LL
H
L
PREA
WRIT
Precharge All
Write
Any
H
X
X
X
H
X
LL
H
L
Active⁽³⁾
H
X
X
V
L
V
LH
L
L
WRITA
Write with Auto-
precharge
Active⁽³⁾
H
X
X
V
H
V
LH
L
L
READ Read
Active⁽³⁾
H
X
X
V
L
V
LH
L
H
READA
Read with Auto-
precharge
Active⁽³⁾
H
X
X
V
H
V
LH
L
H
MRS Mode Register Set
Idle
H
X
X
L, L C
C
LL
L
L
EMRS
Extended Mode
Register Set
Idle
H
X
X H, L V
V
LL
L
L
NOP
No Operation
Any
H
X
X
X
X
X
LH
H
H
BST
Burst Read Stop
Active
H
X
X
X
X
X
LH
H
L
DSL
Device Deselect
Any
H
X
X
X
X
X
HX
X
X
AREF Auto Refresh
Idle
H
H
X
X
X
X
LL
L
H
SELF Self Refresh Entry
Idle
H
L
X
X
X
X
LL
L
H
SELEX Self Refresh Exit
Idle (Self
Refresh)
L
H
X
X
X
HX
X
X
X
LH
H
X
PD
Power Down
Mode Entry
Idle/
Active⁽⁵⁾
H
L
X
X
X
HX
X
X
X
LH
H
X
PDEX
Power Down
Mode Exit
Any (Power
Down)
L
H
X
X
X
HX
X
X
X
LH
H
X
WDE Data Write Enable
Active
H
X
L
X
X
X
XX
X
X
WDD Data Write Disable Active
H
X
H
X
X
X
XX
X
X
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 (W9425G6JH).
5. Power Down Mode can not entry in the burst cycle.
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Publication Release Date: Aug. 27, 2013
Revision A03