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HCD-GP8D
• IC Block Diagrams
– FRONT Board –
IC651 uPD16315GB-3BS
44
LED1
1
LED2
2
3
LED3
LED4
4
OSC
5
OSC
DOUT
6
DIN
7
Serial
interface
CLK
8
STB
9
KEY1
10
KEY2
11
12
13
34
43
42
41
40
39
Grid driver
Command decoder
Display memory
24 bits x 12 words
Timing generator
key scan
Key data memory
(2 x 16 bits)
38
37
36
35
Multiplexed driver
segment driver
14
15
16
17
18
19
20
21
34
SEG19/GRID10
33
32
SEG18/GRID11
31
SEG17/GRID12
30
VEE
SEG16/KS16
29
28
SEG15/KS15
27
SEG14/KS14
SEG13/KS13
26
SEG12/KS12
25
SEG11/KS11
24
SEG10/KS10
23
22
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