hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 16
hd66712u
Manufacturer Part Number
hd66712u
Description
Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66712U.pdf
(88 pages)
- Current page: 16 of 88
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1-line display (N = 0, and NW = 0)
Case 1: When there are fewer than 80 display characters, the display begins at the beginning of
DDRAM. For example, when 24 5-dot font-width characters are displayed using one HD66712,
the display is generated as shown in Figure 2.
When a display shift is performed, the DDRAM addresses shift as well as shown in the figure.
When 20 6-dot font-width characters are displayed using one HD66712, the display is generated as
shown in Figure 3. Note that COM9 to COM16 begins at address (0A)H in this case 20 characters
are displayed.
When a display shift is performed, the DDRAM addresses shift as well as shown in the figure.
Case 2: Figure 4 shows the case where the EXT pin is fixed high and the HD66712 and the 40-
output extension driver are used to display 24 6-dot font-width characters. In this case, COM9 to
COM16 begins at (0A)H.
When a display shift is performed, the DDRAM addresses shift as well as shown in the figure.
COM1 to 8
COM1 to 8
COM1 to 8
COM1 to 8
COM1 to 8
COM1 to 8
COM1 to 8
COM1 to 8
Figure 2 1-Line by 24-Character Display (5-Dot Font Width)
Figure 3 1-Line by 20-Character Display (6-Dot Font Width)
00 01 02 03 04
01 02 03 04 05
4F 00 01 02 03
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
4F 00 01 02 03
00 01 02 03 04
01 02 03 04 05
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
05
06
04
06
07
05
07
08
06
05
06
04
08
09
07
06
07
05
9
9
10
09
10
0A
08
07
08
06
11
11
0A
0B
09
08
09
07
9
9
12
0B
12
0C
0A
10
10
0A
09
08
13 14 15 16 17 18 19 20
13 14 15 16 17 18 19 20
11 12 13 14 15 16 17 18
11 12 13 14 15 16 17 18
0C 0D 0E 0F 10
0D 0E 0F 10 11
0B 0C 0D 0E 0F
0A 0B 0C 0D 0E
0B 0C 0D 0E 0F
09 0A 0B 0C 0D
0F
0E
11
12
10
10
12
13
11
10
11
0F
13
14
12
11
12
10
21
21
19
19
14
15
13
12
13
11
22
22
20
20
15
16
14
13
14
12
23
23
16
17
15
24
24
17
18
16
COM9 to 16
(Left shift display)
COM9 to 16
(Right shift display)
COM9 to 16
Display position
DDRAM address
COM9 to 16
(Left shift display)
COM9 to 16
(Right shift display)
COM9 to 16
Display position
DDRAM address
HD66712U
379
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