NT68275
(4) Window 1 Registers: Row 15, Column 0
Row 15
Column 0
7
6
5
4
Row Start Address
MSB
LSB
3
2
1
0
Row End Address
MSB
LSB
Window 1 Row Size Control
Bit 7-4: These bits determine the row start position of Window 1on the 15*30 OSD screen.
Bit 3-0: These bits determine the row end position of Window 1on the 15*30 OSD screen.
Row 15
Column 1
7
MSB
6
5
4
Column Start Address
3
2
1
0
LSB WINEN *WINT SHAD
Window1 Column Size Control & Attribute Control
Bit 7-3: These bits determine the column start position of Window 1 on the 15*30 OSD screen.
Bit 2: WINEN - This bit enables window 1 when it is set. The default value is 0 after power on.
Bit 1: * WINT - Window intensity. This bit controls the intensity of Window 1 .By setting this bit to 1, the INT pin
will go high while displaying Window 1 and characters inside the window. See Figure 5.
Bit 0: SHAD - This bit enables the shadowing on the window when it is set to ‘1’. The default value is 0 after
power on.
Row 15
Column 2
7
6
5
4
3
2
1
0
Column End Address
MSB
LSB
R
G
B
Window 1 Column Size Control & Attribute Control
Bit 7-3: These bits determine the column end position of Window 1on the 15*30 OSD screen.
Bit 2-0: R/G/B – These bits control the background color of Window 1. Refer to Table for color selection.
Note: Window 1 control registers occupy column 0-2 of row 15, Window 2 from column 3-5, Window 3 from
6-8 and Window 4 from 9-11. The function of Window 2- 4 control registers is the same as Window 1.
Window 1 has the highest priority, and the Window 4, the least. The higher priority color will take
over on the overlap window area.
If the start address of the row/column is greater than the end address, the window will not be
displayed.
Out of range setting (over 15 rows or 30 columns range) will cause abnormal operation.
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