MK31VT464-10YE (98.07.24)
FUNCTION TRUTH TABLE (Table1) (2/2)
Current State
/CS
H
L
/RAS
X
H
H
H
L
/CAS
X
H
H
L
/WE BA
ADDR
X
Action
Precharge
X
H
L
X
H
L
X
X
H
L
X
H
L
X
X
H
L
X
H
L
X
X
X
X
X
X
X
H
L
X
X
NOP Idle after t
RP
X
X
CA
RA
A10
X
X
X
X
CA
RA
A10
X
X
X
NOP Idle after t
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
NOP 4
ILLEGAL
NOP
NOP
RP
L
L
L
L
L
H
L
L
L
L
L
L
H
L
L
L
L
L
L
H
L
L
L
L
H
L
BA
BA
BA
BA
X
H
H
L
X
H
H
L
H
H
L
X
H
H
L
H
H
L
X
H
L
H
L
X
H
H
L
L
L
Write
Recovery
X
H
H
H
L
X
X
BA
BA
BA
BA
X
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL
L
L
Row Active
X
H
H
H
L
L
L
X
H
H
L
X
X
NOP Row Active after t
NOP Row Active after t
ILLEGAL 2
RCD
RCD
BA
BA
BA
BA
X
X
X
X
X
X
X
X
X
X
CA
RA
A10
X
X
X
X
X
X
X
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL
Refresh
NOP Idle after t
NOP Idle after t
ILLEGAL
ILLEGAL
ILLEGAL
NOP
NOP
ILLEGAL
RC
RC
L
Auto Resister
Access
X
H
H
H
L
X
X
L
L
L
X
X
X
X
X
X
ILLEGAL
ILLEGAL
X
ABBREVIATIONS
RA = Row Address
CA = Column Address
BA = Bank Address
AP = Auto Precharge
NOP = No Operation command
Notes:
1. All inputs will be enabled when CKE is set high for at least 1 cycle prior to the inputs.
2. Illegal to bank in specified state, but may be legal in some cases depending on the state of
bank selection.
3. Satisfy the timing of tCCD and tWR to prevent bus contention.
4. NOP to bank precharging or in idle state. Precharges activated bank by BA or A10.
5. Illegal if any bank is not idle.
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