HD44780U Datasheet, PDF (12/59 Pages) Hitachi Semiconductor – Dot Matrix Liquid Crystal Display Controller/Driver

HD44780U
 Case 2: For a 16-character × 2-line display, the HD44780 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
position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
DDRAM 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
address
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
HD44780U display
Extension driver
display
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
27 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E
shift right
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
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