SM-B79
SM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R - Reviewed by M.B. - Copyright © 2021 SECO S.p.A.
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eDP0_HPD_3.3V: embedded DP channel#0 Hot Plug Detect for SMARC
®
module. Active high signal, +3.3V_RUN electrical level
LCD0_VDD_EN_3V3: eDP channel#0 Panel power for LCD Enable Signal, derived by LCD0_VDD_EN from SMARC
®
Module through voltage level translator.
+3.3V_RUN electrical level Output.
LCD0_BKLTEN_3V3: eDP channel#0 Panel
power for Backlight Enable Signal, derived by LCD0_BKLT_EN from SMARC
®
Module through voltage level translator.
+3.3V_RUN electrical level Output.
LCD0_BKLT_PWM_3V3: eDP channel#0 Panel Backlight Brightness Control, PWM signal derived by LCD0_BKLT_PWM from SMARC
®
Module through voltage level
translator. +3.3V_RUN electrical level Output.
Here following the signals involved in eDP channel#1 management:
eDP1_TX[0..3]+ / eDP1_TX[0..3]-: SMARC
®
module embedded DP channel#1 differential data pairs
e / eDP1_AUX-: SMARC
®
module embedded DP channel#1 auxiliary channel differential data pair.
eDP1_HPD_3.3V: embedded DP channel#1 Hot Plug Detect for SMARC
®
module. Active high signal, +3.3V_RUN electrical level
LCD1_VDD_EN_3V3: eDP channel#1 Panel power for LCD Enable Signal, derived by LCD1_VDD_EN from SMARC
®
Module through voltage level translator.
+3.3V_RUN electrical level Output.
LCD1_BKLTEN_3V3: eDP channel#1 Panel
power for Backlight Enable Signal, derived by LCD1_BKLT_EN from SMARC
®
Module through voltage level translator.
+3.3V_RUN electrical level Output.
LCD1_BKLT_PWM_3V3: eDP channel#1 Panel Backlight Brightness Control, PWM signal derived by LCD1_BKLT_PWM from SMARC
®
Module through voltage level
translator. +3.3V_RUN electrical level Output.
3.3.4
LCD Panels Voltage connectors
It is possible to use two additional connectors for
connecting LCD panels voltage rails, both for
LCD and for backlights.
LCD and backlight voltages can be set by using
dedicated jumpers CN18, CN19, CN20 and
CN21 described in par.3.3.2.
CN16 and CN17, are two IDC connectors, dual row, 10 pin, p2.54 mm connector, type MOLEX p/n 70246-1004 or equivalent.
Mating connector: MOLEX p/n 22-25-2102 with 70058 series female crimp terminals.
LCD Panel #0 Voltage connector CN16
LCD Panel #1 Voltage connector CN17
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
1
VDD_LCD0
2
VDD_BKLT0
1 VDD_LCD1
2
VDD_BKLT1
3
+5V_RUN
4
+12V_RUN
3 +5V_RUN
4
+12V_RUN
5
LCD0_VDD_EN_3V3
6
LCD0_BKLTEN_3V3
5 LCD1_VDD_EN_3V3
6
LCD1_BKLTEN_3V3
7
---
8
LCD0_BKLT_PWM_3V3
7 ---
8
LCD1_BKLT_PWM_3V3
9
GND
10
GND
9 GND
10 GND