THEMIS
THEMIS User Manual - Rev. First Edition: 1.0 - Last Edition: 2.2 - Author: A.R. - Reviewed by S.R. -Copyright © 2022 SECO S.p.A.
25
LVDS Connector
In addition to HDMI, THEMIS 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 or dual channel.
For the connection, a connector type HR A1014WV-S-2X25P or equivalent (2 x
25p, male, straight, P1, low profile, polarized) is provided, with the pin-out shown
in the table below.
Mating connector: HR A1014H -2X25P with HR A1014-T female crimp terminals.
Alternative mating connector, MOLEX 501189-5010 with crimp terminals series
501334.
On the same connectors, are also implemented signals for direct driving of display
’
s backlight: voltages
(LVDS_VCC_LCD_SW and LVDS_VCC_BKL_SW) and control signals (LCD Panel enable signal LVDS_PPEN,
Backlight enable signal BLT_EN, digital and analog Backlight Brightness Control signal, respectively
BLT_CTRL and LVDS_BLT_ANA).
The LCD software-driven voltage, i.e. signal LVDS_VCC_LCD_SW, can be factory regulated to be connected
to +5V_ALW or +3.3V_ALW, while backlight software-driven voltage, i.e. signal LVDS_VCC_BKL_SW, can
be factory regulated to be connected to +5V_ALW or +12V_ALW
These are factory configurations, please take care of specifying which is the configuration needed for
EDP_VCC_LCD_SW and EDP_VCC_BKL_SW voltage rail.
There are also signals necessary for driving I2C touchscreens (I2C signals, reset and interrupt request signals).
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:
/ LVDS_A0-: LVDS Channel #0 differential data pair #0.
/ LVDS_A1-: LVDS Channel #0 differential data pair #1.
/ LVDS_A2-: LVDS Channel #0 differential data pair #2.
/ LVDS_A3-: LVDS Channel #0 differential data pair #3.
LVD / LVDS_A_CLK-: LVDS Channel #0 differential Clock.
/ LVDS_B0-: LVDS Channel #1 differential data pair #0.
/ LVDS_B1-: LVDS Channel #1 differential data pair #1.
/ LVDS_B2-: LVDS Channel #1 differential data pair #2.
LVDS connector CN17
Pin
Signal
Pin
Signal
1
LVDS_VCC_LCD_SW
2
LVDS_VCC_BKL_SW
3
LVDS_VCC_LCD_SW
4
LVDS_VCC_BKL_SW
5
LVDS_VCC_LCD_SW
6
LVDS_VCC_BKL_SW
7
3.3V_RUN
8
GND
9
GND
10
11
12
LVDS_A0-
13
LVDS_A1-
14
GND
15
GND
16
17
18
LVDS_A2-
19
LVDS_A3-
20
GND
21
GND
22
LVD
23
24
LVDS_A_CLK-
25
LVDS_B0-
26
GND
27
GND
28
29
30
LVDS_B1-
31
LVDS_B2-
32
GND
33
GND
34
35
LVD
36
LVDS_B3-
37
LVDS_B_CLK-
38
GND
39
GND
40
GND
41
BLT_EN
42
BLT_CTRL
43
LVDS_BLT_ANA
44
LVDS_PPEN
45
TOUCH_SCL
46
TOUCH_RST
47
TOUCH_SDA
48
TOUCH_INT#
49
TOUCH_SDA
50
TOUCH_SCL
