Intel MCS48 User Manual page 158

8048/8648/8748/8035
A.C.
CHARACTERISTICS (PORT
2
TIMING)
T
A
= 0°C
to
70°
C,
Vcc
=
5V±10%, V
ss
= 0V
Symbol
Parameter
Min.
Max. Unit Test Conditions
tCP
Port Control Setup Before
Falling
Edge
of
PROG
110
ns
tpc
Port Control
Hold
After Falling
Edge
of
PROG
100 ns
tPR
PROG
to
Time P2
Input
Must Be
Valid 810
ns
tPF
Input Data Hold
Time
150
ns
tDP
Output Data Setup
Time 250
ns
tPD
Output Data Hold Time 65 ns
tpp
PROG
Pulse Width 1200 ns
tPL
Port 2 I/O
Data Setup
350 ns
tLP
Port 2 I/O
Data Hold 150 ns
PORT
2
TIMING
y—\
EXPANDER
PORT
DC
EXPANDER
PORT
IX
v
—
V
X
>:
PORT
2n-3
DATA
X
PORT
2
a i
DATA
PORT CONTROL
PORT
CONTROL
X
OUTPUT DATA
:c
X^
INPUT 'k/
A r A
ft
H
/
6-6