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IC BLOCK DIAGRAM
SCHEMATIC DIAGRAM(KEY BOARD)
3 Cathode (kK)
ind
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2)
o
+
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secs
WwW
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ICO
mt
a
x
a
{a
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5
N
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=
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7
5
w
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|
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al}
w
fe
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If
u
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oll
2 no =
(8
| N
o
< E ® O 3
a)
2-4
3 Bie :
0 b, veaal
6 : Q
+
=
8
a
G
3
Reference(R)
PORT2/3
PORT2/2
PORT2/1
PORT2/0
PORTO/0
PORT3/3
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PORT3/1
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