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W9425G6EH
Function Truth Table, continued
CURRENT
STATE
Write
Recovering
Write
Recovering
with Auto-
precharge
Refreshing
Mode
Register
Accessing
CS
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
H
L
L
L
L
RAS
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
L
L
X
H
H
H
L
CAS
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
H
L
X
H
H
L
X
WE
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
H
L
H
X
X
X
H
L
X
X
ADDRESS
X
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
X
X
X
X
X
X
X
X
X
X
X
COMMAND
DSL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PREA
AREF/SELF
MRS/EMRS
DSL
NOP
BST
READ/WRIT
ACT/PRE/PREA
AREF/SELF/MRS/EMRS
DSL
NOP
BST
READ/WRIT
ACT/PRE/PREA/ARE
F/SELF/MRS/EMRS
ACTION
NOP -> Row active after t WR
NOP -> Row active after t WR
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP -> Enter precharge after t WR
NOP -> Enter precharge after t WR
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP -> Idle after t RC
NOP -> Idle after t RC
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP -> Row after t MRD
NOP -> Row after t MRD
ILLEGAL
ILLEGAL
ILLEGAL
NOTES
3
3
3
3
3
3
3
3
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 t RCD is not satisfied.
5. Illegal if t RAS 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 t WR
Remark: H = High level, L = Low level, X = High or Low level (Don’t care), V = Valid data
Publication Release Date:Dec. 03, 2008
- 21 -
Revision A08
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