ST7066U
When display shift operation is performed, the DDRAM address shifts. See Figure 5.
Display
Position
38
39
40
1
2
3
4
5
6
00 01 02 03 04 05
40 41 42 43 44 45
………………..
………………..
25 26 27
65 66 67
DDRAM
Address
(hexadecimal)
Figure 4 2-Line Display
Display
Position
1
2
3
4
5
6
7
8
00 01 02 03 04 05 06 07
40 41 42 43 44 45 46 47
DDRAM
Address
01 02 03 04 05 06 07 08
41 42 43 44 45 46 47 48
For
Shift Left
For
Shift Right
27 00 01 02 03 04 05 06
67 40 41 42 43 44 45 46
Figure 5 2-Line by 8-Character Display Example
Case 2: For a 16-character × 2-line display, the ST7066U can be extended using one 40-output
extension driver. See Figure 6.
When display shift operation is performed, the DDRAM address shifts. See Figure 6.
Display
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
Position
DDRAM
Address
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
For
Shift
Left
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
For
Shift
Right
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
Figure 6 2-Line by 16-Character Display Example
V2.2
11/42
2006/05/11
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