
SSD1339
Rev 1.1
P 45/59 Jul 2005
Solomon Systech
Clear Window (8Eh)
This command sets the window area specify by starting point (Row 1, Column 1) and the ending point
(Row 2, Column 2) to clear the window display. The graphic display data RAM content of the specified
window area will be set to zero.
This command can be combined with Copy command to make as a “move” result. The following example
illustrates the copy plus clear procedure and results in moving the window object.
1. Enter the “copy mode” by execute the command 23h
2. Set the starting column coordinates, Column 1. E.g., 00h.
3. Set the starting row coordinates, Row 1. E.g., 00h.
4. Set the finishing column coordinates, Column 2. E.g., 05h
5. Set the finishing row coordinates, Row 2. E.g., 05h
6. Set the new column coordinates, Column 3. E.g., 06h
7. Set the new row coordinates, Row 3. E.g., 06h
8. Enter the “clear mode” by execute the command 24h
9. Set the starting column coordinates, Column 1. E.g., 00h.
10. Set the starting row coordinates, Row 1. E.g., 00h.
11. Set the finishing column coordinates, Column 2. E.g., 05h
12. Set the finishing row coordinates, Row 2. E.g., 05h
Figure 31 – Example of copy + clear = Move command
Fill Enable/Disable (92h)
This command has two functions.
Enable/Disable fill (A[0])
0 = Disable filling of color into rectangle in draw rectangle command. (POR)
1 = Enable filling of color into rectangle in draw rectangle command.
Enable/Disable reverse copy (A[4])
0 = Disable reverse copy (POR)
1 = During copy command, the new image colors are swapped such that “GS0” <-> “GS63”,
“GS1” <-> “GS62”, ….
Row 3 + Row 2,
Column 3 + Column 2
Row 1,
Column 1
Row 3,
Column 3
Original
Image
New Copied
Image
Clear
Command