Philips CE130/55 Service Manual page 70

1 Semiconductor
FUNCTION TRUTH TABLE (Table 1) (1/2)
Current
CS RAS
1
State
H X
Idle
L H
L H
L H
L L
L L
L L
L L
H X
Row Active
L H
L H
L H
L L
L L
L L
Read H X
L H
L H
L H
L H
L L
L L
L L
H X
Write
L H
L H
L H
L H
L L
L L
L L
H X
Read with
Auto
L H
Precharge
L H
L H
L H
L L
L L
H X
Write with
Auto
L H
Precharge
L H
L H
CAS WE BA ADDR
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 H X X
L L L OP Code
X X X X
H X X X
L H BA CA, A10
L L BA CA, A10
H H BA RA
H L BA A10
L X X X
X X X X
H H X X
H L X X
L H BA CA, A10
L L BA CA, A10
H H BA RA
H L BA A10
L X X X
X X X X
H H X X
H L X X
L H BA CA, A10
L L BA CA, A10
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 H BA CA, A10
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 H BA CA, A10
Action
NOP
NOP
ILLEGAL 2
ILLEGAL 2
Row Active
NOP 4
Auto-Refresh or Self-Refresh 5
Mode Register Write
NOP
NOP
Read
Write
ILLEGAL 2
Precharge
ILLEGAL
NOP (Continue Row Active after Burst ends)
NOP (Continue Row Active after Burst ends)
Term Burst --> Row Active
Term Burst, start new Burst Read 3
Term Burst, start new Burst Write 3
ILLEGAL 2
Term Burst, execute Row Precharge
ILLEGAL
NOP (Continue Row Active after Burst ends)
NOP (Continue Row Active after Burst ends)
Term Burst --> Row Active
Term Burst, start new Burst Read 3
Term Burst, start new Burst Write 3
ILLEGAL 2
Term Burst, execute Row Precharge 3
ILLEGAL
NOP (Continue Burst to End and enter Row Precharge)
NOP (Continue Burst to End and enter Row Precharge)
ILLEGAL 2
ILLEGAL 2
ILLEGAL
ILLEGAL 2
ILLEGAL
NOP (Continue Burst to End and enter Row Precharge)
NOP (Continue Burst to End and enter Row Precharge)
ILLEGAL 2
ILLEGAL 2
FEDD56V16160F-02
MSM56V16160F
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