User's Manual

Table Of Contents
LCD CONTROLLER S3C2450X RISC MICROPROCESSOR
22-40
8.1.12 Window 1 Position Control A Register
Register Address R/W Description Reset Value
VIDOSD1A 0x4C800034 R/W Video Window 1’s position control 2 register 0x0000_0000
VIDOSD1A Bit Description initial state
OSD_LeftTopX_F [21:11] Horizontal screen coordinate for left top pixel of OSD image 0
OSD_LeftTopY_F [10:0] Vertical screen coordinate for left top pixel of OSD image 0
8.1.13 Window 1 Position Control B Register
Register Address R/W Description Reset Value
VIDOSD1B 0x4C800038 R/W Video Window 1’s position control register 0x0000_0000
VIDOSD1B Bit Description Initial state
OSD_RightBotX_F [21:11] Horizontal screen coordinate for right bottom pixel of OSD
image
0
OSD_RightBotY_F [10:0] Vertical screen coordinate for right bottom pixel of OSD image 0
NOTE: Registers must have word boundary X position.
So, 24bpp mode should have X position by 1 pixel. ( ex, X = 0,1,2,3….)
16bpp mode should have X position by 2 pixel. ( ex, X = 0,2,4,6….)
8bpp mode should have X position by 4 pixel. ( ex, X = 0,4,8,12….)
8.1.14 Window 1 Alpha Value Register
Register Address R/W Description Reset Value
VIDOSD1C 0x4C80003C R/W Video Window 1’s alpha value register 0x0000_0000
ALPHAVAL Bit Description Initial state
Reserved [31:24] Reserved 0
ALPHA0_R [23:20] Red Alpha0 value 0
ALPHA0_G [19:16] Green Alpha0 value 0
ALPHA0_B [15:12] Blue Alpha0 value 0
ALPHA1_R [11:8] Red Alpha1 value 0
ALPHA1_G [7:4] Green Alpha1 value 0
ALPHA1_B [3:0] Blue Alpha1 value 0