HD66710
304
2-line display (N = 1, and NW = 0)
Case 1: The first line is displayed from COM1 to COM16, and the second line is displayed from
COM17 to COM32. Care is required because the end address of the first line and the start address
of the second line are not consecutive. For example, the case is shown in Figure 5 where 16
×
2-
line display is performed using the HD66710. When a display shift operation is performed, the
DDRAM address shifts. See Figure 4.
COM1 to 8
COM17 to 24
COM9 to 16
COM25 to 32
Display position
DDRAM address
COM1 to 8
COM17 to 24
COM9 to 16
COM25 to 32
COM1 to 8
COM17 to 24
COM9 to 16
COM25 to 32
(Left shift display)
(Right shift display)
00 01 02 03 04
06
05
1 2 3 4 5 6 7 8
07
08 09 0A 0B 0C
0E
0D
9 10111213141516
0F
40 41 42 43 44
46
45
47
48 49 4A 4B 4C
4E
4D
4F
01 02 03 04 05
07
06
08
09 0A 0B 0C 0D
0F
0E
10
41 42 43 44 45
47
46
48
49 4A 4B 4C 4D
4F
4E
50
27 00 01 02 03
05
04
06
07 08 09 0A 0B
0D
0C
0E
67 40 41 42 43
45
44
46
47 48 49 4A 4B
4D
4C
4E
Figure 4 2-line by 16-Character Display Example
Case 2: Figure 5 shows the case where the EXT pin is fixed to high, the HD66710 and the 40-
output extension driver are used to extend the number of display characters.
In this case, the start address from COM9 to COM16 of the HD66710 is 0AH, and that from
COM25 to COM32 of the HD66710 is 4AH. To display 24 characters, the addresses starting at
SEG11 should be used.
When a display shift operation is performed, the DDRAM address shifts. See Figure 5.
00 01 02 03 04
06
05
07 08 09 0A 0B
0C 0D 0E 0F 10
11 12 13 14 15 16 17
COM9 to COM16
DDRAM address
1 2 3 4 5 6 7
8 9 101112
1314151617 18192021222324
HD66710
SEG1 to SEG35
HD66710
SEG11 to SEG35
(SEG1 to SEG10:
skip)
Extension
driver (1)
Seg1 to Seg25
Extension
driver (1)
Seg1 to Seg35
Display position
(Left shift display)
01 02 03 04
06
05
08 09
41 42 43 44 45 46
07
47
48 49
0A 0B
4A 4B
0C
4C
12 13
52 53
14 15 16
54 55 56
17
57
COM9 to
COM16
COM32
00 01 02 03 04
06
05
07 08 09
40 41 42 43 44 45
46 47 48 49
0A
0B
4A
4B
0C 0D 0E 0F
10
4C 4D 4E 4F
50
11 12 13
51 52 53
14 15 16
54 55 56
COM9 to
COM16
COM32
1 2 3 4 5 6 7
8 9 101112
1314151617 18192021222324
18
58
27
67
(Right shift display)
0D 0E 0F 10 11
4D 4E 4F 50 51
COM1 to
COM8
COM1 to
COM8
COM24
COM1 to
COM8
COM24
Figure 5 2-Line by 24 Character Display Example