Intel MCS48 User Manual page 408

8041 A/8741
A
A.C.
CHARACTERISTICS-PORT
2
T
A
=
0°Cto70°C
(
8041A:
V
CC
=+5V
±10%,8741A: V
CC
=+5V
±
5%
Symbol
Parameter
Min. Max.
Unit Test Conditions
l CP
Port Control Setup
Before
Falling
Edge
of
PROG
110
ns
tpc
Port Control Hold
After Falling
Edge
of
PROG
140
ns
*DP
Output Data Setup Time
220
ns
tpF
Input Data Hold
Time
110 ns
tpp
PROG
Pulse
Width
1400
ns
*PS
Input Data Setup Time
700
ns
WAVEFORMS—
PORT
2
J
V J
V
EXPANDER
PORT
OUTPUT
EXPANDER
PORT
INPUT
IX
ZX
A.C.
CHARACTERISTICS- DMA
T
A
= 0°C
to70°C, V
CC
=5V ±10%
Y
PORT
2 -3
DATA
Y
PORT CONTROL
\
OUTPUT DATA
"/
\
**,„„».
)j
H™rc°....c»
V
g) T
\
/
Symbol
Parameter
Min. Max.
Unit
Test Conditions
Ucc
DAC
to
WR
or
RD
ns
tcAC
RD
or
WR
to
DACK
ns
l
ACD
DACK
to
Data
Valid 225 ns
C
L
=150pF
l
CRQ
RD
or
WR
to
DRQ
Cleared 200
ns
WAVEFORMS— DMA
DACK
\
/
\
l^DC
\
Y I
X
X^X
Y
8-118
00188A