Philips CE130/55 Service Manual page 71

1 Semiconductor
FUNCTION TRUTH TABLE (Table 2) (2/2)
Current
CS RAS
1
State
L H
Write with
Auto
L L
Precharge
L L
H X
Precharge
L H
L H
L H
L L
L L
L L
H X
Write
Recovery
L H
L H
L H
L L
L L
L L
H X
Row Active
L H
L H
L H
L L
L L
L L
H X
Refresh
L H
L H
L L
L L
H X
Mode
Register
L H
Access
L H
L H
L L
ABBREVIATIONS
RA = Row Address BA = Bank Address NOP = No OPeration command
CA = Column Address
∗Notes :1. All inputs are 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 l
4. NOP to bank precharging or in idle state. Precharges activated bank by BA or A10.
5. Illegal if any bank is not idle.
BA ADDR
CAS WE
L L X X
H X BA RA, A10
L X X X
X X X X
H H X X
H L BA X
L X BA CA
H H BA RA
H L BA A10
L X X X
X X X X
H H X X
H L BA X
L X BA CA
H H BA RA
H L BA A10
L X X X
X X X X
H H X X
H L BA X
L X BA CA
H H BA RA
H L BA A10
L X X X
X X X X
H X X X
L X X X
H X X X
L X X X
X X X X
H H X X
H L X X
L X X X
X X X X
AP = Auto Precharge
and t to prevent bus contention.
CCD WR
Action
ILLEGAL
ILLEGAL 2
ILLEGAL
NOP --> Idle after t RP
NOP --> Idle after t RP
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
NOP 4
ILLEGAL
NOP
NOP
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL
NOP --> Row Active after t RCD
NOP --> Row Active after t RCD
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL 2
ILLEGAL
NOP --> Idle after t RC
NOP --> Idle after t RC
ILLEGAL
ILLEGAL
ILLEGAL
NOP
NOP
ILLEGAL
ILLEGAL
ILLEGAL
FEDD56V16160F-02
MSM56V16160F
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