– 36 –
IC502 µPD753012AGK-781-BE9 (SUB SYSTEM CONTROL, LCD DRIVE)
Pin No. Pin name I/O Description
1 – 18 S12 – S29 O LCD segment signal output.
19, 20 ––––– – Not used (OPEN).
21 COM0 O LCD common signal output.
22 COM1 O LCD common signal output.
23 COM2 O LCD common signal output.
24 COM3 O LCD common signal output.
25 BIAS O Bias output for LCD.
26 VLC0 – LCD drive power supply.
27 VLC1 – LCD drive power supply.
28 VLC2 – LCD drive power supply.
29 – 37 ––––– – Not used (Connect to GND).
38 REQ I Request signal input.
39 SCK I Sub clock input.
40 ––––– – Not used (fix to “L”).
41 SI I Data signal input.
42 – 45 ––––– – Not used (Connect to GND).
46 ACK O PLL clock signal control output.
47 – 53 ––––– – Not used (OPEN).
54 VDD – Power supply terminal.
55 XT1 I Sub clock input (32.768kHz).
56 XT2 O Sub clock output (32.768kHz).
57 IC – Connect to VDD.
58 X1 I System main clock input (4MHz).
59 X2 O System main clock output (4MHz).
60 – 67 ––––– – Not used (OPEN).
68 – 80 S0 – S11 O LCD segment signal output.
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Circuit Boards Location
ROM board
MICROCOMPUTER board
REEL board
CONTROL board
ANTENNA board
ICF-SW07 ANTENNA CONTROLLER SW LOOP ANTENNA
MAIN board
KEY board
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6
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Q
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3
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3
1
5
1
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0
9
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8
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2
9
8
T
E
L
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9
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9
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5
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9
9
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8
9
4
2
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8
0
5
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5
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6
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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