Intel MCS48 User Manual page 372

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WAVEFORMS
Read Operation
a
,
cs
y
'
\
DATA
BUS
(OUTPUT)
HIGH IMPEDANCE\Y
\\\\\\\\\\\\\\\V
X
/
\
v\\\\\\\\\\high impedance
\\\\\\\\\\\\\\\\\\\\\\\\V
(SYSTEM'S
ADDRESS
BUS)
(READ CONTROL)
s
Write Operation
**
IDC
DATA
BUS
(INPUT)
\
DATA
MAY
CHANGE
X
X
/
>•
DATA
VALID
-
'WD
X
DATA
MAY
CHANGE
(SYSTEM'S
ADORESSBUS)
(WRITE
CONTROL)
Clock
Input
IV
/
\
/
-«CY"
8-82
00742A