hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 19

• Manufacturer Part Number: hd66712u
• Description: Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66712U
382
Case 2: Figure 7 shows the case where the EXT pin is fixed high and the HD66712 and the 40-
output extension driver are used to extend the number of display characters to 32 5-dot font-width
characters.
In this case, 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.
COM1 to
COM8
COM17 to
COM24
COM1 to
COM1
COM8
COM17 to
COM1
COM24
COM1 to
COM8
COM17 to
COM24
Figure 7 2-Line by 32 Character Display (5-Dot Font Width)
00 01 02 03 04
40 41 42 43 44
01 02 03 04 05
41 42 43 44 45
27 00 01 02 03
67 40 41 42 43
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
HD66712
SEG1–SEG60
05
45
06
46
04
44
06
46
07
47
05
45
07
47
08
48
06
46
08
48 49 4A 4B
09
49 4A 4B 4C
07
47 48 49 4A
9
9
10
10
09
0A
08
11
11
0A 0B
0B
09
12
12
0C
0A
13 14 15 16 17 18 19 20
13 14 15 16 17 18 19 20
0C 0D 0E 0F 10
4C 4D 4E 4F 50
0D 0E 0F 10 11
4D 4E 4F 50 51
0B 0C 0D 0E 0F
4B 4C 4D 4E 4F
HD66712
SEG1–SEG60
11
51
12
52
10
50
12
52
13
53
11
51
13
53
14
54
12
52
21
21
14
54 55 56 57
15
55 56 57 58
13
53 54 55 56
22
22
15
16
14
23
16
23
17
15
24
17
24
18
16
25 26 27 28 29 30 31 32
25 26 27 28 29 30 31 32
18 19 1A 1B 1C
58 59 5A 5B 5C
19 1A 1B 1C 1D
59 5A 5B 5C 5D
17 18 19 1A 1B
57 58 59 5A 5B
Extension driver
Seg1–Seg40
1D
5D
1E
5E
1C
5C
1D
5D
1E
5E
1F
5F
1F
5F
20
60
1E
5E
(Left shift display)
(Right shift display)
COM9 to COM16
COM25 to COM32
COM9 to COM16
COM25 to COM32
COM9 to COM16
COM25 to COM32
Display position
DDRAM address