Embedded Artists Display Expansion Board, HDMI/DVI/VGA/LVDS interfaces EA-LCD-010 EA-LCD-010 데이터 시트

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Display Expansion Board - User’s Guide 
Page 5 
 
 
 
Copyright 2012 © Embedded Artists AB 
 
2  Introduction 
Thank you for buying the Display Expansion Board from Embedded Artists. The board makes it 
possible for you to get started with graphical user interface development immediately. The board 
directly interfaces the OEM Base Board (also from Embedded Artists) and can be mounted with it, 
forming a compact unit. 
2.1   Features 
The features of the Display Expansion Board are: 
 
Parallel RGB interface, 16-bit color depth (or 12-bit). 
 
Up to 24-bit color depth supported with manual wiring. 
 
When used together with Embedded Artists Developer’s Kits up to 16-bit color depth is 
supported. 
 
HDMI/DVI (digital) transmitter via TDA19988 from NXP 
 
Note: limited driver functionality for this chip. CEC/HDCP functionality not implemented. 
 
HDMI/DVI (digital) transmitter via TFP410 from TI 
 
VGA (analog) transmitter via ADV7125KST50 from Analog Devices 
 
LVDS (digital) transmitter via DS90C383BMT from National Semiconductor/TI 
 
Switching between 25.175MHz, 27MHz and 36MHz pixel clocks 
 
Spread spectrum (+-2%) oscillators used for reduced EMI. Works for digital transmitters 
(HDMI/DVI/LVDS) but not for (analog) VGA. 
 
Provision for programmable spread spectrum oscillator DS1086LU+ from Maxim (not 
mounted). 
 
Resistive touch screen controller, TSC2046 from TI (normally not used) 
 
I2C-E2PROM with configuration parameters 
 
Controller can read which display board that is connected and initialize the MCU LCD 
controller and control the Display Expansion board accordingly. 
 
Power control signals via I2C-GPIO 
 
50-pos (2x25) IDC interface connector, compatible with Embedded Artists OEM base board 
that is used on LPC1788/LPC3250 v2/LPC4088/LPC4357 Developer’s Kits 
 
Proper ESD protection on HDMI, DVI and VGA ports 
 
Powered via interface connector 
 
3.3V and 5V required 
 
Compact size: 165 x 150 mm 
 
Simple mounting together with OEM Base Board 
2.2   ESD Precaution 
Please note that the Display Expansion Board comes without any case/box and 
all components are exposed for finger touches – and therefore extra attention 
must be paid to ESD (electrostatic discharge) precaution.