A SERVICE OF

logo

:,
18
u
g
BOBB
~
w
'"
w
'"
APPLICATION
EXAMPLES
/
ADO
16
AD1
15
AD2
14
AD3
13
AD4
12
ADS
11
AD,
10
AD7
9
A8
8
A9
7
AlO
,
A11
5
A12
4
A13
3
A14
2
A15
39
32
;~
29
ALE
25
101M 28
~
OT/R
~N.C
HLOA
~N.C.
DEN
~N.C.
INTA
~N.C.
HOLD
~
TEST
23
INTR
18
NMI
17
GND
~
MN/MX
r.:-o+
s
Vco
~+5
GND
h
22
19
21
51O:r
~
5
>-
'"
~
11
10
9
2
23 22
21
19
18
17
16 15 14
13 12
,
'i"
W
I"
I'"
W
READY
;;t
9 a; u
4
Q
I
RST
t-+_+-1
_______
"-I3
ClK
41
510 32
B755A
VDD~+
vcc~+
20
;:
Xl
17
0--;
PBO
~
:f:O
Y1
";'
~
PB7 PA7
IT
=='MH,
~------------------~~------~------~--~~
8
10
'"
~
~
W
U
'"
W
'"
X
21-"",--....,1
'N'o..,
CR4
~'
1-=-
1
510
~
I~
L9;4
..
______
~~~--~~;3-=-
+5o-~I~:~_i~_i~~
1~3
*-=-
R3
74lS14
"''"J'"
4.7KQ
R1
11
C2
}
:'",
'':'''~
74LS14
~
W2
B2B4A
RES
560K
1,..
+5
TCR1
~
'~~14
R2
-
-,-
L.j(
1'1~~I-4--<'0"0"Q--o,
I
~
+5
2~
J3
NOTE: SW21W A QUAD SPST DIP
Figure 4-3. Vest Pocket Schematic
4-6