26
AVR-2801/981
TC9459N (EX: IC805~807)
L-LD2
9
L-ch7 to 91decoder
R-ch latch circuit
R-ch7 to 91decoder
10
19
NC
22
NC
3
2
4
5
6
7
8
11
12
13
14
28
27
26
25
24
23
21
20
18
17
16
15
1
NC
L-OUT
NC
L-IN
L-LD1
L-A-GND
NC
CS1
NC
GND
CK
V
SS
V
DD
NC
R-OUT
R-LD1
R-LD2
R-A-GND
NC
CS2
NC
STB
DATA
R-IN
50k
W
/
91STEP
VR
Same as L-ch
L-ch latch circuit
Shift register (24Bit)
Level shift circuit
BU4052BC (PO: IC401)
(RE: IC371, 375)
16
1
8
1
2
V
EE
3
4
5
6
7
8
9
1 0
11
1 6
1 5
1 4
1 3
12
Y0
Y2
Y1
INH
Vss
V
DD
X2
X1
X0
A
B
LEVEL
CONVER
-TER
BINARY TO 1 of 4
DECODER WITH INHIBIT
13 X
3 Y
Y3 4
Y2 2
Y1 5
Y0 1
X3 11
X2 15
X1 14
X0 12
V
EE
7
B 9
INH 6
V
SS
8
A 10
V
DD
16
Y-COM
2
V
EE
3
4
5
6
7
8
9
1 0
11
1 6
1 5
1 4
1 3
12
Y1
Y0
Z-COM
Z0
INH
Vss
Y-COM
X-COM
X1
X0
C
A
B
Z1
Y3
X-COM
X3
LEVEL
CONVER
-TER
BINARY TO 1 of 2
DECODER WITH INHIBIT
14 X
Z1 3
Z0 5
Y1 1
Y0 2
X1 13
X0 12
7
Vss8
15 Y
4 Z
TRUTH TABLE
I N H I B I T
A
B
O N S W I T C H
L
L
L
X 0
Y 0
H
L
L
X 1
Y 1
L
L
H
X 2
Y 2
H
L
H
X 3
Y 3
X
H
X
N O N E
X : d o n ' t C a r e
TRUTH TABLE
I N H I B I T
A
B
O N S W I T C H
L
L
L
X 0
Y 0
H
L
L
L
L
H
H
L
H
X
H
X
N O N E
X : d o n ' t C a r e
L
L
L
H
L
L
L
L
H
H
L
H
C
L
L
H
H
X
L
L
H
H
Z 0
X 1
Y 0
Z 0
X 0
Y 1
Z 0
X 1
Y 1
Z 0
X 0
Y 0
Z 1
X 1
Y 0
Z 1
X 0
Y 1
Z 1
X 1
Y 1
Z 1
1
28
14
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9
9
2
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4
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9
8
0
5
1
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1
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6
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Q
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