WHITE PAPER LVDS Flat Panel Display Interface on Intel® Desktop Boards July 2009 Order Number: E77911-001
White Paper: LVDS on Intel Desktop Boards Revision History Revision Revision History Date 1.0 Initial release of the LVDS Flat Panel Interface on Intel Desktop Boards White Paper July 2009 INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT.
White Paper: LVDS on Intel Desktop Boards Contents 1 Introduction.......................................................................................................4 1.1 Overview.................................................................................................... 4 1.2 24-bpp Display Panel Compatibility ................................................................ 5 2 Hardware Support..............................................................................................6 2.
White Paper: LVDS on Intel Desktop Boards 1 Introduction LVDS flat panel displays are common in the industry because they are the building block for all modern flat panel monitors. The interface for such displays, however, is not standardized and, as a consequence, Intel Desktop Boards with direct LVDS flat panel connectivity follow a specific implementation. Furthermore, system EMC certification is highly dependent on the target chassis.
White Paper: LVDS on Intel Desktop Boards 1.2 24-bpp Display Panel Compatibility LVDS support for 18 bpp (6-bits/color) is based on three differential data-pairs, plus a differential clock signal, per channel. In contrast, 24-bpp (8 bits/color) panels require four differential data-pairs, plus the differential clock signal, per channel. Consequently, an onboard 18-bpp LVDS solution does not support 24-bpp panels in 24-bpp mode; however, certain types of 24-bpp panels can operate in 18-bpp mode.
White Paper: LVDS on Intel Desktop Boards 2 Hardware Support The LVDS flat panel display interface on select Intel Desktop Boards consists of a group of connectors and jumpers. 2.1 LVDS Panel Connector The LVDS panel connector is a 30-pin (dual-row) shrouded white header of 1.00-mm pitch, supporting video data, clock, and EDID signals, as well as panel logic power. 2.1.1 LVDS Panel Connector Pinout Refer to Table 2 for LVDS panel header pinout definition. Table 2.
White Paper: LVDS on Intel Desktop Boards 2.1.2 LVDS Panel Cable Recommendations It is recommended that the cable used for connecting the onboard 30-pin LVDS header to the connector on the display panel support the following: • • • 15 twisted-pairs for data, clock, EDID, and panel logic power connectivity ground shielding in the cable harness for EMI protection as well as a path to ground for 3.3 V/5 V/12 V power pins 25-28 ground wire/connector from the shield for mounting hole attachment 2.1.
White Paper: LVDS on Intel Desktop Boards 2.2.1 Backlight Inverter Power Connector Pinout Refer to Table 4 for backlight inverter power header pinout definition. Table 4. Backlight Inverter Power Header Pinout on Select Intel Desktop Boards Pin Signal Name Description 1 GND Ground 2 GND Ground 3 5 V/12 V Inverter power 4 5 V/12 V Inverter power 5 INV_RATING Inverter rating 6 BKLT_PWM Backlight PWM 7 BKLT_EN Backlight enable 2.2.
