W9412G6CH
Publication Release Date:Jul. 04, 2007
- 18 - Revision A06
8. OPERATION MODE
The following table shows the operation commands.
8.1 Simplified Truth Table
Sym. Command
Device
State
CKEn-1 CKEn DM(4)
BS0,
BS1
A10
A0-A9
,A11
CS
RAS
CAS
WE
ACT Bank Active Idle
(3)
H X X V V V L L H H
PRE Bank Precharge Any
(3)
H X X V L X L L H L
PREA Precharge All Any H X X X H X L L H L
WRIT Write Active
(3)
H X X V L V L H L L
WRITA
Write with Auto-
precharge
Active
(3)
H X X V H V L H L L
READ Read Active
(3)
H X X V L V L H L H
READA
Read with Auto-
precharge
Active
(3)
H X X V H V L H L H
MRS Mode Register Set Idle H X X L, L C C L L L L
EMRS
Extended Mode
Register Set
Idle H X X H, L V V L L L L
NOP No Operation Any H X X X X X L H H H
BST Burst Read Stop Active H X X X X X L H H L
DSL Device Deselect Any H X X X X X H X X X
AREF Auto Refresh Idle H H X X X X L L L H
SELF
Self Refresh
Entry
Idle H L X X X X L L L H
H X X X
SELEX Self Refresh Exit
Idle (Self
Refresh)
L H X X X X
L H
H X
H X X X
PD
Power Down
Mode Entry
Idle/
Active
(5)
H L X X X X
L H
H X
H X X X
PDEX
Power Down
Mode Exit
Any
(Power
Down)
L H X X X X
L H
H X
WDE Data Write Enable Active H X L X X X X X X X
WDD Data Write Disable Active H X H X X X X X X X
Notes:
1. V = Valid X = Don’t Care L = Low level H = High level
2. CKE
n
signal is input level when commands are issued.
CKE
n-1
signal is input level one clock cycle before the commands are issued.
3. These are state designated by the BS0, BS1 signals.
4. LDM, UDM (W9412G6CH).
5. Power Down Mode can not entry in the burst cycle.
