LC7471 데이터 시트보기 (PDF) - SANYO -> Panasonic
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LC7471 Datasheet PDF : 12 Pages
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LC7471
Display ROM Configuration
The display ROM is configured as 1,536 words from
address 000H to 5FFH as shown in the following table.
Each 16-bit word contains a 7-bit character code and a
single control bit. When the control bit is 0, the 7-bit
character code is significant and is used to address the
character generator ROM, and when 1, the 7-bit character
code in ROM is ignored and the character code is read
from display RAM. The display RAM address automati-
cally increments by one each time a character code is read
from RAM. Note that your local SANYO representative
can offer advice on how to specify the generator character
ROM.
Video signal control bits
Address
FEDCBA 9 8 7 6 5 4 3 2 1 0
Description
000H
0
0
0
0
0
0
0
0 ROM/ 0 ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 Address of first character of line 1
RAM
to
017H
0
0
0
0
0
0
0
0
ROM/
RAM
0
Address of twenty-fourth character
ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 of line 1
018H
0
0
0
0
0
0
0
0 ROM/ 0 ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 Address of first character of line 2
RAM
to
5FFH
0
0
0
0
0
0
0
0
ROM/
RAM
0
Address of twenty-fourth character
ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 of line 64
The function of each significant bit in a display ROM word is shown in the following table.
Data bit
0
1
2
3
4
5
6
7
Name
ADR0
ADR1
ADR2
ADR3
ADR4
ADR5
ADR6
ROM/RAM
Description
Specifies the character generator ROM address. ADR0 to ADR5 should be set to 0 when bit 7 is 1.
Should be set to 0.
Selects direct ROM addressing.
Selects indirect ROM addressing from RAM.
The line addresses in display ROM are shown in the following table.
Line
Address(hex)
Line
Address(hex)
Line
Address(hex)
Line
Address(hex)
1
00
17
180
2
18
18
198
3
30
19
1B0
4
48
20
1C8
5
60
21
1E0
6
78
22
1F8
7
90
23
210
8
A8
24
228
9
C0
25
240
10
D8
26
258
11
F0
27
270
12
108
28
288
13
120
29
2A0
14
138
30
2B8
15
150
31
2D0
16
168
32
2E8
33
300
49
480
34
318
50
498
35
330
51
4B0
36
348
52
4C8
37
360
53
4E0
38
378
54
4F8
39
390
55
510
40
3A8
56
528
41
3C0
57
540
42
3D8
58
558
43
3F0
59
570
44
408
60
588
45
420
61
5A0
46
438
62
5B8
47
450
63
5D0
48
468
64
5E8
No.4088–8/12
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