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t
CH
ø
A
to A
23
0
AS
RD
(read)
D
to D
7
0
(read)
WR (write)
t
WDD
D
to D
7
0
(write)
T
1
t
cyc
t
CL
t
Cf
t
AD
t
t
ASD
ACC3
t
AS1
t
t
ASD
ACC3
t
AS1
t
ACC1
t
ASD
t
AS1
t
t
WDS1
Figure 18-7 Basic Bus Cycle: Two-State Access
T
2
t
Cr
t
t
SD
AH
t
t
SD
AH
t
t
RDS
RDH
t
t
SD
AH
WSW1
t
WDH
t
PCH
t
PCH
t
PCH
533
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