SBC-C23
SBC-C23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by L.B. -Copyright © 2020 SECO S.p.A.
22
3.3
Connectors description
3.3.1
LVDS + backlight connector
SBC-C23 board can be interfaced to LCD displays using its LVDS interface, which allows the connection of displays with a colour depth of 18 or 24 bit, single
channel.
For the connection, a connector type HR A1014WVB-S-2x15P or equivalent (2 x 15p, male, straight, P1, low
profile, polarized) is provided, with the pin-out shown in the table below.
Mating connector: HR A1014H-2X15P with HR A1014-T female crimp terminals.
On the same connectors, are also implemented signals for direct driving of display
’
s
backlight: voltages (VIN, +5V
LCD
and +3.3V
LCD
) and control signals (Backlight enable signal,
LVDS_BLT_EN).
V
IN
voltage, available on pins 27-29, is the Power Voltage that is supplied to the board though
DC Jack CN1 or Power in connector CN76 (+12V
DC
is supported).
+5V
LCD
is derived from VCC_SW power rail. +3.3V
LCD
is derived from 3V3_ALW power rail. Both voltages are
switched on and off via SW.
When building a cable for connection of LVDS displays, please take care of twist as tight as possible differential
pairs
’
signal wires, in order to reduce EMI interferences. Shielded cables are also recommended. Here following
the signals related to LVDS management:
LV/LVDS0_TX0-: LVDS Channel #0 differential data pair #0.
LV/LVDS0_TX1-: LVDS Channel #0 differential data pair #1.
LV/LVDS0_TX2-: LVDS Channel #0 differential data pair #2.
LV/LVDS0_TX3-: LVDS Channel #0 differential data pair #3.
LV/LVDS0_CLK-: LVDS Channel #0 differential Clock.
LVDS_BLT_EN: NVCC_3V0 electrical level Output with a 10k
Ω
pull-down resistor, Panel Backlight Enable signal. It can be used to turn On/Off the backlight
’
s lamps
of connected LVDS display.
I2C1_SCL: I2C Bus clock line. Bidirectional signal, electrical level NVCC_3V0 with a 10k
Ω
pull-up resistor. It is managed by i.MX6 processor
’
s I2C1 controller.
I2C1_SDA: I2C Bus data line. Bidirectional signal, electrical level NVCC_3V0 with a 10k
Ω
pull-up resistor. It is managed by i.MX6 processor
’
s I2C1 controller.
TOUCH_INT: Touch Screen IRQ line, NVCC_3V0 electrical level with a 10k
Ω
pull-up resistor.
TOUCH_RST: Touch Screen Reset signal, NVCC_3V0 electrical level with a 10k
Ω
pull-down resistor.
LVDS connector - CN3
Pin Signal
Pin Signal
1
GND
2
LVDS0_TX0-
3
I2C1_SCL
4
LV
5
I2C1_SDA
6
GND
7
GND
8
LVDS0_TX1-
9
+5V
LCD
10
LV
11
+5V
LCD
12
GND
13
+3.3V
LCD
14
LVDS0_TX2-
15
+3.3V
LCD
16
LV
17
NVCC_3V0
18
GND
19
LVDS_BLT_EN
20
LVDS0_CLK-
21
TOUCH_INT
22
LV
23
TOUCH_RST
24
GND
25
GND
26
LVDS0_TX3-
27
V
IN
28
LV
29
V
IN
30
GND
