SBC-C57
SBC-C57 User Manual - Rev. First Edition: 1.0 - Author: S.O. - Reviewed by R.Z. - Copyright © 2021 SECO S.p.A.
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/ LVDS_B1-: LVDS Channel #1 differential data pair #1.
/ LVDS_B2-: LVDS Channel #1 differential data pair #2.
/ LVDS_B3-: LVDS Channel #1 differential data pair #3.
LVD / LVDS_B_CLK-: LVDS Channel #1 differential Clock.
BLT_EN: VCC_LCD electrical level Output with a 10k
Ω
pull-up resistor, Backlight Enable signal. It can be used to turn On/Off the backlight
’
s lamps of connected
displays.
LVDS_PPEN: VCC_LCD electrical level Output with a 10k
Ω
pull-up resistor, Panel Power Enable signal. It can be used to turn On/Off the connected display.
BLT_CTRL: this signal can be used to adjust the backlight brightness in displays supporting Pulse Width Modulated (PWM) regulations (VCC_LCD electrical level).
LVDS_BLT_ANA: Analog dimming for LVDS panel backlight, electrical level ranging from 0V up to VCC_LCD
TOUCH_SCL: I2C Bus clock line. electrical level VDD_3V3 with a 2K2
Ω
pull-up resistor. It is managed by the processor
’
s I2C controller #1.
TOUCH_SDA: I2C Bus data line. Bidirectional signal, electrical level VDD_3V3 with a 2K2
Ω
pull-up resistor. It is managed by the processor
’
s I2C controller #1.
TOUCH_RST: VDD_3V3 electrical level output, active high signal with a 10k
Ω
pull-down resistor. This signal can be used to drive a reset of an eventual external
Touch Screen connected to the dedicated I2C interface.
TOUCH_INT#: VDD_3V3 electrical level input, active low
-up resistor. This signal can be used to serve the interrupt request of an eventual
external Touch Screen connected to the dedicated I2C interface.
3.3.5
Panel voltage selectors
Values of voltage supply for the panel (VCC_LCD) and the backlight (VCC_BLT) can be set by using dedicated jumpers CN13 and CN14. These will both affect
such voltages on the LVDS connector and on the eDP connector.
LCD_PWR: LCD switched voltage rail. Its value can be set to +3.3V or +5V by using dedicated jumper
CN34, which is a standard pin header, P2.54mm, 1x3 pin.
BKLT_PWR: Backlight switched voltage rail. Its value can be set to +5V or +12V by using dedicated
jumper CN35, same type of CN34. This jumper is not available on boards equipped with the optinal
LED Driver (see par. 3.3.7)
Since the use of jumpers in environments with vibrations issues could be a problem, it is possible to provide SBC-
C57 boards with the LCD Power and Backlight Power fixed at the desired value. For this purpose, some dedicated
0-Ohm resistors can be mounted (factory default: not available). Please contact your local Sales rep in case you
need this special configuration.
CN13 Jumper VCC_LCD voltage value
1-2
+3V3_ALW
2-3
+5V_ALW
CN14 Jumper VCC_BLT voltage value
1-2
+12V_ALW
2-3
+5V_ALW
