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參數(shù)資料
| 型號(hào)： | LC7471 |
| 元件分類： | 畫(huà)面疊加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP22 |
| 封裝： | SHRINK, DIP-22 |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大小： | 134K |
| 代理商： | LC7471 |
LC7471
No.4088–9/12
Screen Configuration
The character screen display is configured as 12 lines
× 24 characters, making a maximum number of 288 characters
when the smallest character size is used. The number of characters that can be displayed reduces as character size is
increased. The character screen configuration is shown in the following table.
The start address for each of the twelve display lines is specified in the display line address registers in RAM. An
example arrangement of ROM and RAM addresses is shown in the following table. Note how both the RAM and
ROM addresses increment.
e
n
i
L
r
e
b
m
u
n
r
e
t
c
a
r
a
h
C
10
01
02
03
04
05
06
07
08
09
00
11
12
13
14
15
16
17
18
19
10
21
22
23
2
24
25
26
27
28
29
20
31
32
33
34
35
36
37
38
39
30
41
42
43
44
45
46
47
4
38
49
40
51
52
53
54
55
56
57
58
59
50
61
62
63
64
65
66
67
68
69
60
71
7
42
73
74
75
76
77
78
79
70
81
82
83
84
85
86
87
88
89
80
91
92
93
94
95
9
56
97
98
99
90
0
11
0
12
0
13
0
14
0
15
0
16
0
17
0
18
0
19
0
10
1
11
1
12
1
13
1
14
1
15
1
16
1
17
1
18
1
19
1
60
2
11
2
12
2
13
2
14
2
15
2
16
2
17
2
18
2
19
2
10
3
11
3
12
3
13
3
14
3
15
3
16
3
17
3
18
3
19
3
10
4
11
4
12
4
13
4
1
74
4
15
4
16
4
17
4
18
4
19
4
10
5
11
5
12
5
13
5
14
5
15
5
16
5
17
5
18
5
19
5
10
6
11
6
12
6
13
6
14
6
15
6
16
6
17
6
1
88
6
19
6
10
7
11
7
12
7
13
7
14
7
15
7
16
7
17
7
18
7
19
7
10
8
11
8
12
8
13
8
14
8
15
8
16
8
17
8
18
8
19
8
10
9
11
9
1
92
9
13
9
14
9
15
9
16
9
17
9
18
9
19
9
10
0
21
0
22
0
23
0
24
0
25
0
26
0
27
0
28
0
29
0
20
1
21
1
22
1
23
1
24
1
25
1
2
0
16
1
27
1
28
1
29
1
20
2
21
2
22
2
23
2
24
2
25
2
26
2
27
2
28
2
29
2
20
3
21
3
22
3
23
3
24
3
25
3
26
3
27
3
28
3
29
3
2
1
10
4
21
4
22
4
23
4
24
4
25
4
26
4
27
4
28
4
29
4
20
5
21
5
22
5
23
5
24
5
25
5
26
5
27
5
28
5
29
5
20
6
21
6
22
6
23
6
2
14
6
25
6
26
6
27
6
28
6
29
6
20
7
21
7
22
7
23
7
24
7
25
7
26
7
27
7
28
7
29
7
20
8
21
8
22
8
23
8
24
8
25
8
26
8
27
8
2
e
n
i
L
)
x
e
h
(
n
o
i
t
a
r
u
g
i
f
n
o
c
M
O
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d
n
a
M
A
R
r
e
t
c
a
r
a
h
C
123456789
0
11
12
13
14
15
16
17
18
19
10
21
22
23
24
2
1
M
O
R
0
M
O
R
1
0
M
O
R
2
0
M
O
R
3
0
M
O
R
4
0
M
O
R
5
0
M
O
R
6
0
M
O
R
7
0
M
O
R
8
0
M
O
R
9
0
M
O
R
A
0
M
O
R
B
0
M
O
R
C
0
M
O
R
D
0
M
O
R
E
0
M
O
R
F
0
M
A
R
0
M
A
R
1
0
M
A
R
2
0
M
A
R
3
0
M
A
R
4
0
M
A
R
5
0
M
O
R
6
1
M
O
R
7
1
2
M
O
R
8
1
M
A
R
6
0
M
A
R
7
0
M
A
R
8
0
M
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R
9
0
M
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D
1
M
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E
1
M
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F
1
M
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0
2
M
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1
2
M
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A
0
M
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0
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0
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D
0
M
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E
0
M
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F
0
M
O
R
8
2
M
O
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9
2
M
O
R
A
2
M
O
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B
2
M
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C
2
M
O
R
D
2
M
O
R
E
2
M
O
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F
2
3
M
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0
3
M
A
R
0
1
M
A
R
1
M
A
R
2
1
M
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3
1
M
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4
1
M
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6
3
M
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7
3
M
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8
3
M
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R
9
3
M
A
R
5
1
M
A
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6
1
M
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7
1
M
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8
1
M
A
R
9
1
M
A
R
A
1
M
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B
1
M
A
R
C
1
M
A
R
D
1
M
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R
E
1
M
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R
4
M
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R
5
4
M
O
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6
4
M
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7
4
M
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8
4
M
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9
4
M
O
R
A
4
M
O
R
B
4
M
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R
C
4
M
A
R
F
1
M
A
R
0
2
M
A
R
1
2
M
A
R
2
M
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R
1
5
M
A
R
3
2
M
A
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4
2
M
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4
5
M
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5
2
M
A
R
6
2
M
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R
7
5
M
A
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7
2
M
A
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8
2
M
O
R
A
5
M
O
R
B
5
M
O
R
C
5
M
O
R
D
5
M
O
R
E
5
M
O
R
F
5
M
O
R
0
6
M
A
R
9
2
M
A
R
A
2
M
A
R
B
2
M
A
R
C
2
M
A
R
D
2
M
A
R
E
2
M
A
R
F
2
M
A
R
0
3
M
O
R
9
6
M
A
R
1
3
M
A
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2
3
M
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C
6
M
A
R
3
M
A
R
4
3
M
O
R
F
6
M
A
R
5
3
M
A
R
6
3
M
O
R
2
7
M
O
R
3
7
M
O
R
4
7
M
O
R
5
7
M
O
R
6
7
M
O
R
7
6
M
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8
7
M
A
R
7
3
M
A
R
8
3
M
A
R
9
3
M
A
R
A
3
M
A
R
B
3
M
A
R
C
3
M
A
R
D
3
M
O
R
0
8
M
A
R
E
3
M
A
R
F
3
M
A
R
0
4
M
A
R
1
4
M
O
R
5
8
M
A
R
2
4
M
A
R
3
4
M
A
R
4
M
A
R
5
4
M
A
R
6
4
M
O
R
B
8
M
A
R
7
4
M
A
R
8
4
M
O
R
E
8
M
O
R
F
8
7
M
A
R
9
4
M
A
R
A
4
M
A
R
B
4
M
A
R
C
4
M
A
R
D
4
M
A
R
E
4
M
A
R
F
4
M
A
R
0
5
M
A
R
1
5
M
A
R
2
5
M
A
R
3
5
M
A
R
4
5
M
O
R
C
9
M
O
R
D
9
M
O
R
E
9
M
O
R
F
9
M
O
R
0
A
M
O
R
1
A
M
O
R
2
A
M
O
R
3
A
M
O
R
4
A
M
O
R
5
A
M
O
R
6
A
M
O
R
7
A
8
M
A
R
5
M
A
R
6
5
M
A
R
7
5
M
A
R
8
5
M
A
R
9
5
M
A
R
A
5
M
A
R
B
5
M
A
R
C
5
M
A
R
D
5
M
A
R
E
5
M
A
R
F
5
M
A
R
0
6
M
O
R
4
B
M
O
R
5
B
M
O
R
6
B
M
O
R
7
B
M
O
R
8
B
M
O
R
9
B
M
O
R
A
B
M
O
R
B
M
O
R
C
B
M
O
R
D
B
M
O
R
E
B
M
O
R
F
B
9
M
O
R
0
C
M
O
R
1
C
M
O
R
2
C
M
O
R
3
C
M
O
R
4
C
M
O
R
5
C
M
O
R
6
C
M
O
R
7
C
M
O
R
8
C
M
O
R
9
C
M
O
R
A
C
M
O
R
B
C
M
A
R
1
6
M
A
R
2
6
M
A
R
3
6
M
A
R
4
6
M
A
R
5
6
M
A
R
6
M
A
R
7
6
M
A
R
8
6
M
A
R
9
6
M
A
R
A
6
M
A
R
B
6
M
A
R
C
6
0
1
M
O
R
8
D
M
O
R
9
D
M
O
R
A
D
M
O
R
B
D
M
O
R
C
D
M
A
R
D
6
M
A
R
E
6
M
A
R
F
6
M
A
R
0
7
M
A
R
1
7
M
A
R
2
7
M
A
R
3
7
M
A
R
4
7
M
A
R
5
7
M
A
R
6
7
M
A
R
7
M
A
R
8
7
M
A
R
9
7
M
A
R
A
7
M
O
R
B
E
M
O
R
C
E
M
O
R
D
E
M
O
R
E
M
O
R
F
E
1
M
O
R
0
F
M
O
R
1
F
M
O
R
2
F
M
O
R
3
F
M
O
R
4
F
M
O
R
5
F
M
O
R
6
F
M
O
R
7
F
M
O
R
8
F
M
O
R
9
F
M
O
R
A
F
M
O
R
B
F
M
O
R
C
F
M
O
R
D
F
M
O
R
E
F
M
A
R
B
7
M
A
R
C
7
M
O
R
1
0
1
M
A
R
D
7
M
A
R
E
7
M
O
R
4
0
1
M
A
R
F
7
M
A
R
0
8
M
O
R
7
0
1
2
1
M
A
R
1
8
M
A
R
2
8
M
A
R
3
8
M
A
R
4
8
M
A
R
5
8
M
A
R
6
8
M
A
R
7
8
M
A
R
8
M
A
R
9
8
M
A
R
A
8
M
A
R
B
8
M
A
R
C
8
M
A
R
D
8
M
A
R
E
8
M
A
R
F
8
M
A
R
0
9
M
A
R
1
9
M
A
R
2
9
M
A
R
3
9
M
A
R
4
9
M
A
R
5
9
M
A
R
6
9
M
A
R
7
9
M
O
R
F
1
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