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— 30 —
• Abbreviation
FL : Fluorescent indicator tube
Pin No.
Pin Name
I/O
Function
41
VSS
–
Ground
42
TX
–
Not used
43
TEX
–
Connected to ground
44
VDD (+5V)
–
Power supply (+5V)
45
VFDP (–30V)
–
Pull down voltage (–30V)
46
XSEL
O
Not used
47
—
–
Not used
48
LP CONTROL
O
LP control hold output
49 to 66
OPEN
–
Not used
67 to 87
S21 to S1
O
FL segment signal output
88
1G
O
FL grid signal output
89
VDD (+5V)
–
Power supply (+5V)
90 to 100
2G to 12G
O
FL grid signal output
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9
2
8
9
4
2
9
8
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9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
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