W9412G6JH
Function Truth Table, continued
CURRENT
ADDRESS
COMMAND
ACTION
NOTES
CS RAS CAS
STATE
WE
H
L
L
L
L
L
L
L
L
X
H
H
H
H
L
X
H
H
L
X
H
L
X
DSL
NOP
BST
NOP->Row active after tWR
NOP->Row active after tWR
ILLEGAL
X
X
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
READ/READA
WRIT/WRITA
ACT
ILLEGAL
3
3
3
3
Write
L
ILLEGAL
Recovering
H
H
L
H
L
ILLEGAL
L
PRE/PREA
AREF/SELF
MRS/EMRS
ILLEGAL
L
H
L
ILLEGAL
L
L
Op-Code
ILLEGAL
NOP->Enter precharge after
tWR
H
L
X
H
X
H
X
H
X
X
DSL
NOP->Enter precharge after
tWR
NOP
L
L
L
L
L
L
L
H
L
L
L
L
L
H
H
H
H
L
H
L
L
H
L
X
BST
ILLEGAL
Write
Recovering
with Auto-
precharge
BA, CA, A10
READ/READA
WRIT/WRITA
ACT
ILLEGAL
3
3
3
3
L
BA, CA, A10
ILLEGAL
H
H
L
H
L
BA, RA
ILLEGAL
L
BA, A10
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
ILLEGAL
L
H
L
X
ILLEGAL
L
L
Op-Code
ILLEGAL
X
H
H
H
L
X
H
H
L
X
H
L
X
X
X
X
X
X
X
NOP->Idle after tRC
NOP->Idle after tRC
ILLEGAL
NOP
BST
Refreshing
H
X
X
X
READ/WRIT
ACT/PRE/PREA
ILLEGAL
H
L
ILLEGAL
L
AREF/SELF/MRS/EMRS ILLEGAL
X
X
DSL
NOP->Row after tMRD
L
L
L
H
H
H
H
H
L
H
L
X
X
X
NOP
NOP->Row after tMRD
ILLEGAL
Mode
Register
Accessing
BST
X
READ/WRIT
ILLEGAL
ACT/PRE/PREA/ARE
F/SELF/MRS/EMRS
L
L
X
X
X
ILLEGAL
Notes
1. All entries assume that CKE was active (High level) during the preceding clock cycle and the current clock cycle.
2. Illegal if any bank is not idle.
3. Illegal to bank in specified states; Function may be legal in the bank indicated by Bank Address (BA), depending on the
state of that bank.
4. Illegal if tRCD is not satisfied.
5. Illegal if tRAS is not satisfied.
6. Must satisfy burst interrupt condition.
7. Must avoid bus contention, bus turn around, and/or satisfy write recovery requirements.
8. Must mask preceding data which don’t satisfy tWR
Remark: H = High level, L = Low level, X = High or Low level (Don’t Care), V = Valid data
Publication Release Date: Nov. 29, 2011
- 20 -
Revision A03
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