HD66712 Datasheet, PDF (18/88 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver

HD66712U
• 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. Note that the last address of the first line and the first address of the second
line are not consecutive. Figure 5 shows an example where a 5-dot font-width 24 × 2-line display
is performed using one HD66712. Here, COM9 to COM16 begins at (0C)H, and COM25 to
COM32 at (4C)H. When a display shift is performed, the DDRAM addresses shift as shown.
Figure 6 shows an example where a 6-dot font-width 20 × 2-line display is performed using one
HD66712. COM9 to COM16 begins at (0A)H, and COM25 to COM32 at (4A)H.
COM1 to
COM8
COM17 to
COM24
1 2 3 4 5 6 7 8 9 10 11 12
00 01 02 03 04 05 06 07 08 09 0A 0B
13 14 15 16 17 18 19 20 21 22 23 24
0C 0D 0E 0F 10 11 12 13 14 15 16 17
Display position
COM9 to COM16
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57
COM25 to COM32
DDRAM address
COM1 to
COM8
COM17 to
COM24
COM1 to
COM8
COM17 to
COM24
1 2 3 4 5 6 7 8 9 10 11 12
01 02 03 04 05 06 07 08 09 0A 0B 0C
41 42 43 44 45 46 47 48 49 4A 4B 4C
13 14 15 16 17 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 (Left shift
COM25 to ^display)
COM32
27 00 01 02 03 04 05 06 07 08 09 0A
67 40 41 42 43 44 45 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 (Right shift
COM25 to ^display)
COM32
Figure 5 2-Line by 24-Character Display (5-Dot Font Width)
COM1 to
COM8
COM17 to
COM24
1 2 3 4 5 6 7 8 9 10
00 01 02 03 04 05 06 07 08 09
11 12 13 14 15 16 17 18 19 20
0A 0B 0C 0D 0E 0F 10 11 12 13
Display position
COM9 to COM16
40 41 42 43 44 45 46 47 48 49
4A 4B 4C 4D 4E 4F 50 51 52 53
COM25 to COM32
DDRAM address
Figure 6 2-Line by 20-Character Display (6-Dot Font Width)
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