AMD
P R E L I M I N A R Y
Memory Bus Interface Waveforms
CLKIN
CLKOUT
(internal)
t
AH
AD
t
AD
m
m
t
t
MA
t
AA
m
n
m
t
ACS
m
CD
m
FCE,
SCE,
XCE
t
RI
m
t
CD
m
t
OE
m
t CH
m
MOE
MWE
t OD
m
t
OD
m
t
HZ
H
(high)
m
t
RDSC
m
t RDHC
m
t
OLZ
m
t
m
valid
MD (Din)
i
data sampled at this point
20138B-15
Figure 9. Memory Bus READ Access Timing Diagram
CLKIN
CLKOUT
(internal)
t
AH
m
t
AD
m
MA
t
t
AW
CW
t
t
AD
n
m
m
m
m
FCE,
SCE,
XCE
CD
t
WI
m
t
CH
m
t
CD
m
(high)
MOE
MWE
t WD
m
t
t
AS
m
WD
m
t WP
m
t
HWZ
m
t HWC
m
t HW
m
t
WQ
m
t
SW
m
valid
MD
o
(Dout)
t
m
t
m
CQ
CV
t
HWZC
m
20138B-16
Figure 10. Memory Bus WRITE Access Timing Diagram
Am79C930
151