ADE3800SXL View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ADE3800SXL

Analog LCD Display Engine for XGA and SXGA Resolutions with Embedded LVDS and RSDS Transmitters

STMicroelectronics 

Register Description by Block

Note: All Row Attributes are assigned as shown:

FG[23:20]

YPOS[23:12]

BG[19:16] CD1[15:14]

CD0[13:12]

HVF[11:10]

ADE3800

XPOS[11:0]

PI[9]

CR[8:2]

TR[1:0]

Note: Character Attributes for Row Type 0 are assigned as shown:

CID[7:0]

Note: Character Attributes for Row Type 1 are assigned as shown:

PI[11]

CD[10]

HF[9]

VF[8]

CID[7:0]

Note: Character Attributes for Row Type 2 are assigned as shown:

PI[15:12]

CD[11:10]

HF[9]

VF[8]

CID[7:0]

4.14.2 Color LUT Calculation

Color pointers in the CLUT [5:0], where:

PI = 4-bit Palette Index (RT0/RT1 have 1--bit PI; RT2 has 4bit PI) ;

P1, P2, P3, P4 = 5-bit programmable pointers, clut_1bpp, clut_2bpp, clut_3bpp, clut_4bpp,

respectively;

PixelData = 2-bit, 3-bit or 4-bit value depending on the character depth 2bpp, 3bpp or 4bpp,

respectively;

C = 4-bit background/foreground color (used only for 1bpp characters);

tcon = OSD_CTRL0[1] * tcon_window where tcon_window is a signal from the TCON block specifying the

window to be highlighted.

RowType0

RowType1

RowType2

1bpp

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P1 + BC) % 64

2bpp

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P2 + PixelData) % 64

3bpp

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P3 + PixelData) % 64

4bpp

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P4 + PixelData) % 64

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P1 + BC) % 64

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P2 + PixelData) % 64

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P3 + PixelData) % 64

(tcon*OSD_CTRL0[2]*32 +

!tcon*32*PI + P4 + PixelData) % 64

(tcon*OSD_CTRL0[2]*(8 + PI%8)*4 +

!tcon*4*PI + P1 + BC) % 64

(tcon*OSD_CTRL0[2]*(8 + PI%8)*4 +

!tcon*4*PI + P2 + PixelData) % 64

(tcon*OSD_CTRL0[2]*(8 + PI%8)*4 +

!tcon*4*PI + P3 + PixelData) % 64

(tcon*OSD_CTRL0[2]*(8 + PI%8)*4 +

!tcon*4*PI + P4 + PixelData) % 64

4.14.3 Alpha Blending

4-bit Alpha is applied to the OSD providing 16 levels (6.25% steps) of blending.

Alpha = 0F:no blending at all (100% OSD data).

Alpha = 00:full blending (100% input video).

The OSD region has a 4-bit global alpha and each RGB has a 4-bit color alpha.

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