HD66710 Datasheet, PDF (14/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
• 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
12345678
00 01 02 03 04 05 06 07
9 10 11 12 13 14 15 16
08 09 0A 0B 0C 0D 0E 0F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
Display position
COM9 to 16
COM25 to 32
DDRAM address
COM1 to 8
COM17 to 24
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50
COM9 to 16
(Left shift display)
COM25 to 32
COM1 to 8
COM17 to 24
27 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E
67 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E
COM9 to 16
(Right shift display)
COM25 to 32
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.
COM1 to
COM8
1234567
00 01 02 03 04 05 06
HD66710
SEG1 to SEG35
8 9 10 1112 1314 15 16 17 18 19 20 21 22 23 24
07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17
Extension
HD66710
Extension
driver (1)
SEG11 to SEG35 driver (1)
Seg1 to Seg25 (SEG1 to SEG10: Seg1 to Seg35
skip)
Display position
COM9 to COM16
DDRAM address
COM1 to
COM8
COM17 to
COM24
1234567
01 02 03 04 05 06 07
41 42 43 44 45 46 47
8 9 10 11 12
08 09 0A 0B 0C
48 49 4A 4B 4C
1314 15 1617 18 19 20 21 22 23 24
0D 0E 0F 10 11 12 13 14 15 16 17 18
4D 4E 4F 50 51 52 53 54 55 56 57 58
COM9 to
COM16
COM25 to
COM32
(Left shift display)
COM1 to
COM8
COM17 to
COM24
27 00 01 02 03 04 05
67 40 41 42 43 44 45
06 07 08 09 0A
46 47 48 49 4A
0B 0C 0D 0E 0F 10 11 12 13 14 15 16
4B 4C 4D 4E 4F 50 51 52 53 54 55 56
COM9 to
COM16
COM25 to
COM32
(Right shift display)
Figure 5 2-Line by 24 Character Display Example
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