24
7510 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
LCD Display RAM
The 7510 group has LCD display RAM apart from user RAM at
addresses 004016 to 043F16. The LCD display RAM consists of
160 bytes. The memory space for the LCD display RAM can be
selected as zero page addresses 004016 to 00DF16 or third page
addresses 034016 to 03DF16, by setting the LCD display RAM ad-
dress selection bit.
When the LCD display RAM is at zero page, the addresses 004016
to 00DF16 of user RAM can not be used. When the LCD display
RAM is at third page, the addresses 034016 to 03DF16 of user
RAM can not be used. After reset, the LCD display RAM is set to
third page.
Writing “1” to a bit of the LCD display RAM activates the corre-
sponding pixel on the LCD panel and writing “0” to the bit turns the
pixel off.
Note: The data of user RAM at the same addresses with the LCD display
RAM (addresses 004016 to 00DF16 or 034016 to 03DF16) is retained.
Therefore, user RAM can be used effectively by switching the LCD
display RAM address.
Fig. 20 LCD display RAM map and example of a display pattern for 1/16 duty operation
1
10
1
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
100 0
0 111 01 111 101 110 10 001
00 101 110
110 110 010 00 010 010 000 10 001
10 00 100 100
101 010 010 00 010 010 000 10 001
10 00 100 100
101 010 010 00 010 001 110 10 001
11 11 100 100
100 010 010 00 010 000 001 10 001
10 00 100 100
100 010 010 00 010 000 001 10 001
10 00 100 100
100 010 111 00 010 011 110 01 110
10 00 101 110
111 110 000 00 000 000 000 00 000
00 00 000 000
11
100 010 011 01 111 111 111 00 100
11 11 111 110
110 110 100
0 000 110 000 0
100
10 00 010 001
10
010 000 10 001 011 110 00 100
10 00 010 001
10
010 011 00 010 000 001 00 100
11 11 011 110
100 010 000 10 010 000 001 00 100
10 00 010 000
100 010 100 10 010 010 001 00 100
10 00 010 000
100 010 011 00 010 001 110 01 110
10 00 010 000
000 000 000 00 000 000 000 00 000
1 1 1 100 000
SEG
0
SEG
1
SEG
2
SEG
3
SEG
4
SEG
5
SEG
6
SEG
7
SEG
8
SEG
9
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
SEG
16
SEG
17
SEG
18
SEG
19
SEG
20
SEG
21
SEG
22
SEG
23
SEG
24
0340
16
0341
16
0342
16
0343
16
0344
16
0345
16
0346
16
0347
16
0348
16
0349
16
034A
16
034B
16
034C
16
034D
16
034E
16
034F
16
0350
16
0351
16
0352
16
0353
16
0354
16
0355
16
0356
16
0357
16
0358
16
0386
16
0387
16
0388
16
0389
16
038A
16
038B
16
038C
16
038D
16
038E
16
038F
16
03D6
16
03D7
16
03D8
16
03D9
16
03DA
16
03DB
16
03DC
16
03DD
16
03DE
16
03DF
16
0390
16
0391
16
0392
16
0393
16
0394
16
0395
16
0396
16
0397
16
0398
16
0399
16
039A
16
039B
16
039C
16
039D
16
039E
16
039F
16
03A0
16
03A1
16
03A2
16
03A3
16
03A4
16
03A5
16
03A6
16
03A7
16
03A8
16
At
third
page
selection
0040
16
0041
16
0042
16
0043
16
0044
16
0045
16
0046
16
0047
16
0048
16
0049
16
004A
16
004B
16
004C
16
004D
16
004E
16
004F
16
0050
16
0051
16
0052
16
0053
16
0054
16
0055
16
0056
16
0057
16
0058
16
0086
16
0087
16
0088
16
0089
16
008A
16
008B
16
008C
16
008D
16
008E
16
008F
16
00D6
16
00D7
16
00D8
16
00D9
16
00DA
16
00DB
16
00DC
16
00DD
16
00DE
16
00DF
16
0090
16
0091
16
0092
16
0093
16
0094
16
0095
16
0096
16
0097
16
0098
16
0099
16
009A
16
009B
16
009C
16
009D
16
009E
16
009F
16
00A0
16
00A1
16
00A2
16
00A3
16
00A4
16
00A5
16
00A6
16
00A7
16
00A8
16
At
zero
page
selection
SEG
70
SEG
71
SEG
72
SEG
73
SEG
74
SEG
75
SEG
76
SEG
77
SEG
78
SEG
79
LSB
MSB
LSB
MSB
LCD display RAM map