1.概述

 
LT8668EX是Lontium的第二代LCD控制器，支持VGA接口和基于ClearedEdge™技术的HDMI接口，符合HDMI 1.4（高清晰度多媒体接口）规范。它还可以支持带有HDMI接口的双模式DP和MHL。为了向后兼容，此LCD控制器还包括一个高性能模拟接口，可与传统的VGA / YPbPr接口配合使用。利用四路LVDS端口，它可以支持4Kx2K分辨率的四路LVDS端口监视器。和双LVDS prots或单LVDS端口为其他分辨率。对于LCD控制器的整体解决方案，LT8668EX集成了主要功能包括位置调整，可编程标量，视频处理器（色调，饱和度，亮度和对比度调整），OSD，伽马校正，PWM，MCU，总共16个GPIO和非闪存。为了便于实现多媒体系统，LT8668EX具有支持2声道音频和spdif音频格式的高质量数字音频输入和输出接口。 LT8668EX在其中集成了4M位的nor-flash，并且还可以通过SPI接口使用外部的nor-flash来实现兼容性。
LT8668EX采用128引脚LQFP封装，工作温度范围为-10℃-70℃。
 
2.特点
 

•直接接口到DVI 1.0和HDMI V1.4接收器

•符合DVI高达1.65Gbps和HDMI V1.4高达3.0Gbps

•在具有HDMI的相同引脚上支持双模式DP

•在HDMI的相同引脚上支持MHL

•多像素格式：RGB 6/8/10/12位每个分量（bpc）; YCbCr 422/444 8/10/12 bpc

•高输入灵敏度，差分输入电平低至80mV

•接收器侧均衡高达12 dB

•自动丢失信号检测

•高抖动容限高达0.7UI

•HDCP解密

•片上VGA / HDMI EDID

•支持高达4Kx2K @ 30Hz的分辨率

•Qual通道LVDS输出，支持18/24/48位LCD面板

•RGB888 / RGB666 / RGB565输出

•可编程数字PWM，用于背光控制

•完全可编程的标量比和独立的水平/垂直缩放

•可编程的色调，亮度，饱和度和对比度调整

•支持伽玛校正和抖动

•嵌入式OSD

•集成的微控制器，用于系统级管理

•支持ISP编程

•外部IIC UART和SPI接口

•支持I2S / SPDIF音频输入和输出

•音频左右声道音频PWM输出

•广泛的电源管理，实现省电

•支持总共16个GPIO

•集成模式生成

•集成非闪存（选件）

 
3.应用

 

•高清液晶电脑显示器

•用于医疗和其他应用的高清液晶显示器

•多媒体处理和显示控制

1. General Description

The LT8668EX is Lontium’s second generation LCD controller that supports both VGA interface and the HDMI interface based on ClearEdge Technology, compliant with the HDMI 1.4(High Definition Multimedia Interface) specification. It can support Dual-Mode DP with HDMI interface. For backward compatibility, this LCD controller also includes a high performance analog interface to work with traditional VGA/YPbPr interface. With quad-LVDS ports it can support quad-LVDS ports monitor with 4Kx2K resolution. And dual-LVDS ports or single-LVDS port for other resolution. For total solution of LCD controller, LT8668EX integrates main functions including position adjustment, programmable scalar, video processor (hue, saturation, brightness and contrast adjustment), OSD, gamma correction, PWM, MCU, total 16 GPIOs and nor-flash(option). For easy implementation of a multi-media system, LT8668EX has high quality digital audio input and output interface that support 2-channel audio and SPDIF audio format. LT8668EX integrates 4M bits nor-flash inside, and also you can use external nor-flash by SPI interface for compatibility.

2. Features

• Direct interface to DVI 1.0 and HDMI V1.4 receiver

• Compliance with DVI up to 1.65Gbps and HDMI V1.4 up to 3.0Gbps

• Support Dual-Mode DP on the same pins with HDMI

• Multiple pixel formats: RGB 6/8/10/12 bit per component (bpc); YCbCr 422/444 8/10/12 bpc 

• High input sensitivity, with differential input level down to 80mV

• Receiver side equalization up to 12 dB

• Auto Loss of Signal detection

• High jitter tolerance up to 0.7UI

• HDCP decryption 

• On-chip VGA/HDMI EDID 

• Support resolution up to 4Kx2K@30Hz

• Qual channels LVDS outputs, Support 18/24/48-bit LCD panels

• RGB888/RGB666/RGB565 output

• Programmable digital PWM for backlight control

• Fully programmable scalar ratios and independent horizontal/vertical scaling

• Programmable hue, brightness, saturation and contrast adjustment

• Support Gamma correction and dithering

• Embedded OSD 

• Integrated microcontroller for system level management

• Support ISP programming

• External IIC UART and SPI interface

• Support  I2S/SPDIF audio input and output

• Audio left and right channel audio PWM outputs

• Extensive power management for power savings

• Support total 16 GPIOs

• Integrated pattern generation

• Integrated nor-flash(option)

3.  Applications

• HD LCD computer Monitors

• HD LCD Monitors for medical and other applications

• Multi-Media process and display control

• HDMI//VGA to LVDS/TTL Interface convertion

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