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APPLICATION EXAMPLES
VCC
D2, D3 = IN 914
PA7
R2-R6
= 1800Q
-
ClK
PORTA
Vee
>
R3
R2
T1
1#
2N2907
XMIT
DATA
R6
>
PBO
.
PORT
BI'.
Vee
R4
(TO RS232 PIN
3)
PB7
I.A
"R9
r
RCV
DATA
8755A
'f
E3
l~
180Q
HI
R5
v T2
CE2
I
-'"
2N2222
CE1
C1
*D1
:>
110~
ADO-
ALE
RCVDATA
L-
-
(FROM RS232 PIN
2)
AD7
RD
-=-
AS
A9
A10
10W
-
1
A
13
SIGNAL
GROUND (RS232 PIN 7)
+
A
11
~
A10
A 13
-
-
ALE
-
RD
-
WR
-
101M
-
RESET
AS
A9
CE2
I-
WR
RD
8185
ALE
~
E6
ADO-AD7
-V
CS
m
4-3