Intel MCS48 User Manual page 361

8278
A.C.
CHARACTERISTICS
Ta
= 0°C
to
70°
C;
Vcc = +5V
±10%; Vss
=
0V
Symbol
Parameter Min.
Max.
Units
Condition
tAC
Address
(CS, Ao)
Setup
to
Control (RD,
WR)
ns
tCA
Address Hold from Control ns
tec
Control Pulse Width
250
ns
D0-D7,
Cl =
150pF
tDW Data
in
Setup
to
WR
T.E.
150
ns
two Data
in
Hold
After
WR
T.E.
ns
tRD
RD
L.E. to
Data
Out
Valid
150 ns
tDF
RD
T.E. to
Data
Out
Float 10
100 ns
tMCY Matrix Cycle
Time
10.7
ms
With
6MHz
Crystal
tRV
Recovery Time Between Reads
and/or
Writes
1
MS
WAVEFORMS
Read
Operation
—
Data
Bus
Buffer Register
53
OR A
X
\
/
<:
DATA
VALID-
>
Write Operation
—
Data
Bus
Buffer Register
CS OR A
V
X
(READ CONTROLI
(WRITE
CONTROL)
X
-DATA
VALID-
E£
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