ADE3800XT View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ADE3800XT

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

STMicroelectronics 

Register Description by Block

ADE3800

Table 29: Gamma LUT RAM addresses

I2C Address

Memory Contents

1000 – 10FF

1100 – 11FF

1200 – 12FF

Red RAM

Green RAM

Blue RAM

Note: RAM ACCESS REQUIRES DOTCLK >= XCLK (refer to Chapter 4.22: I²C Registers and RAM

Addresses)

4.14 On-Screen Display (OSD)

The On-Screen Display block has the following features:

● Registers 4900 – 4915 are shadowed and are updated on the falling edge of out_venab.

● Pointers for the global RAM refer to 24 bit word locations.

● Pointers for the color LUT RAM refer to 32 bit word locations.

● Write access to the RAMs is shadowed.

● Read access to the global RAM is shadowed.

● Display list must be in top to bottom order for consistent operation.One RAM block 4096x24 is

used for the full operation of the OSD, and is internally subdivided for character use or display

list with the ability to set up the pointers through I2C.

● The characters can be displayed anywhere on the screen.

● H/V position is programmable per row

● Global Alpha blending for all the characters displayed as well as Alpha blending per color with

16 levels

● H/V flip per character

● 1bpp/2bpp/3bpp/4bpp characters supported.

● Rotation support

● Color LUT of 64 colors (24bit RGB True Color + 4 bit alpha).

Table 30: OSD Registers (Sheet 1 of 3)

Register Name

Addr Mode Bits Rst

Description

OSD_RAM

OSD_CLUT

1700- R/W

46FF

4700- R/W

47FF

I2C address space allocated for OSD Ram

I2C address space allocated for OSD CLUT

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