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W9725G6KB
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
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
RAS
X
H
H
H
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
H
L
L
L
L
CAS
X
H
L
L
H
H
L
L
X
H
L
L
H
H
L
L
X
H
L
L
H
H
L
L
X
H
L
L
H
H
L
L
WE
X
H
H
L
H
L
H
L
X
H
H
L
H
L
H
L
X
H
H
L
H
L
H
L
X
H
H
L
H
L
H
L
ADDRESS
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code
COMMAND
DSL
NOP
READ/READA
WRIT/WRITA
ACT
PRE/PREA
REF/SELF
MRS/EMRS
DSL
NOP
READ/READA
WRIT/WRITA
ACT
PRE/PREA
REF/SELF
MRS/EMRS
DSL
NOP
READ/READA
WRIT/WRITA
ACT
PRE/PREA
REF/SELF
MRS/EMRS
DSL
NOP
READ/READA
WRIT/WRITA
ACT
PRE/PREA
REF/SELF
MRS/EMRS
ACTION
NOP-> Bank active after t WR
NOP-> Bank active after t WR
ILLEGAL
New write
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP-> Precharge after t WR
NOP-> Precharge after t WR
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP-> Idle after t RC
NOP-> Idle after t RC
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP-> Idle after t MRD
NOP-> Idle after t MRD
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOTES
1
1
1
1
1
1
1
Notes:
1. This command may be issued for other banks, depending on the state of the banks.
2. All banks must be in “ IDLE ” .
3. Read or Write burst interruption is prohibited for burst length of 4 and only allowed for burst length of 8. Burst read/write can
only be interrupted by another read/write with 4 bit burst boundary. Any other case of read/write interrupt is not allowed.
Remark: H = High level, L = Low level, X = High or Low level ( Don?t Care ), V = Valid data.
Publication Release Date: Sep. 03, 2012
- 35 -
Revision A03
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