SM-B69
SM-B69 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author:A.R - Reviewed by M.B. - Copyright © 2020 SECO S.p.A.
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3.2.1.1
LCD Display Support Signals
The Intel
®
family of SOCs formerly coded as Apollo Lake offers signal for direct driving of panels and its display
’
s backlight: enabling signals for both panels
(LCD0_VDD_EN and LCD1_VDD_EN) and both backlights ( LCD0_BKLT_EN and LCD1_BKLT_EN), Backlight Brightness Control signals (LCD0_BKLT_PWM and
LCD1_BKLT_PWM). These signals have an electrical of +1.8V_RUN, so they will be adapted/level shifted by the carrier board for external use.
There are also the signals necessary for driving I2C Data and Clock lines of LCD EDID EEPROM.
The panel control signals are:
LCD0_VDD_EN: Panel #0 Panel enable signal. Set high to enable. +1.8V_RUN electrical level Output.
LCD0_BKLT_EN: Panel #0 Panel Backlight Enable signal. It can be used to turn On/Off the backlight
’
s lamps of a connected LVDS display. +1.8V_RUN electrical
level Output.
LCD0_BKLT_PWM: This signal can be used to adjust the Panel #0 backlight brightness in displays supporting Pulse Width Modulated (PWM) regulations.
+1.8V_RUN electrical level Output.
LCD1_VDD_EN: Panel #1 Panel Power signal enable signal. Set high to enable. +1.8V_RUN electrical level Output
LCD1_BKLT_EN: Panel #1 Backlight Enable signal. It can be used to turn On/Off the backlight
’
s lamps of a connected LVDS display. +1.8V_RUN electrical level
Output.
LCD1_BKLT_PWM: This signal can be used to adjust the Panel #1 backlight brightness in displays supporting Pulse Width Modulated (PWM) regulations. +1.8V_RUN
electrical level Output.
I2C_LCD_DAT: LCD I2C Data. This signal is used to read the LCD display EDID EEPROM.
I2C_LCD_CLK: LCD I2C Clock: This signal is used to read the LCD display EDID EEPROM.
Please refer to the following schematics as an example of implementation for LCD and backlight support signals driving conn voltage level shifters on the
carrier board.
All schematics (henceforth also referred to as material) contained in this manual are provided by SECO S.r.l. for the sole purpose of
arding the suitability of this material for any purpose or activity and
disclaims all warranties and conditions with regard to said material, including but not limited to, all expressed or implied warranties and
conditions of merchantability, suitability for a specific purpose, title and non-infringement of any third party intellectual property rights.
The customer acknowledges and agrees to the conditions set forth that these schematics are provided only as an example and that he will
conduct an independent analysis and exercise judgment in the use of any and all material. SECO declines all and any liability for use of this
