EAGLE
PRELIMINARY
Ver 1.3
3.15.11 Palette RAM Data Register (OSDPRD)
Address : FFE0 4C20h
Bit
R/W
R
R/W
R/W
R/W
Description
Default Value
31 : 24
23 : 16
15 : 8
7 : 0
Reserved
-
Internal Palette RAM Red Value
Internal Palette RAM Green Value
Internal Palette RAM Blue Value
Undefined
Undefined
Undefined
In general , the format of OSD image is BMP. This register provides 24-bit color data which corresponds to Bitmap index
for internal palette RAM.
3.15.12 First OSD window start position Register (OSDWSP0)
Address : FFE0 4C24h
Bit
31 : 16
15 : 0
R/W
R/W
R/W
Description
Default Value
0000h
Vertical position
Horizontal position
0000h
4BPP : User can only specify numbers in multiple of eight
8BPP : User can only specify numbers in multiple of four
16BPP : User can specify only even numbers
For 640x480 resolution , data ranges from (0, 0) to (639, 479)
3.15.13 First OSD window size Register (OSDWS0)
Address : FFE0 4C28h
Bit
31 : 16
15 : 0
R/W
R/W
R/W
Description
Default Value
0000h
Vertical size
Horizontal position
0000h
4BPP : User can only specify numbers in multiple of eight
8BPP : User can only specify numbers in multiple of four
16BPP : User can specify only even numbers
For 640x480 resolution , data ranges from (0, 0) to (639, 479)
-register configuration methods:
For 640x480 resolution,
Start position register = 0x00C80010 // (16, 200),
Area size = 0x00C80190 // 400 x 200
Figure 3-29 OSD window example
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