ADE3700SX datasheet(5/89 Pages) STMICROELECTRONICS

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ADE3700

General Information

The ADE3700 family of devices is capable of implementing all of the advanced features of today’s

LCD monitor products. For maximum flexibility, an external microcontroller (MCU) is used for

controlling the ADE3700 and other monitor functions.

The ADE3700 architecture unburdens the MCU from all data-intensive pixel manipulations,

providing an optimal blend of features and code customizing without incurring the cost of a 16-bit

processor or memory. The key interactions between the monitor MCU and the ADE3700 can be

broken down into the features shown in the table below.

Figure 1: ADE3700 Block Diagram

Table 1: ADE3700 Features (Sheet 1 of 2)

Feature

Description of ADE3700 Operation

Blocks Used

Pages

Power-up /

Initialize

When power is first applied, the ADE3700 is asynchronously reset from a pin.

The MCU typically programs the ADE3700 with a number of default values

and sets up the ADE3700 to identify activity on any of the input pins. All pre-

configured values and RAMs, such as DVI settings, line-lock PLL settings,

OSD characters, LCD timing values (output sequencer), scale kernels,

gamma curves, sRGB color warp, APC dithering, output pin configuration

(OMUX), etc. can be pre-loaded into the ADE3700. The typical end state is

that the ADE3700 is initialized into a low power mode, ready to turn active

once the power button is pressed.

GLBL

SMEAS

LLK

ADC

OSD

SCALER

GAMMA

SRGB

OUTSEQ

TCON

APC

OMUX

Activity Detect

When the monitor has been powered on, the inputs can be monitored for

active video sources. Based on the activity monitors, the MCU chooses an

input or power down state.

SMEAS

LCD

Timing Controller

Freq. Synthesizer

LLKPLL

INCLK

SCLK

DOTCLK

Color

Management

OSD

GAMMA

LUT

DATA

CTRL

Analog

DMEAS

SMEAS

Pattern

Generator

SCLK

Frequency

Synthesizer

Scaler

Port

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