SBC-D23
SBC-D23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by P.Z. - Copyright © 2021 SECO S.p.A.
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V_LEDx-: LED String x Cathode Input
3.3.8
Touch Screen Connector
It is possible to connect an external Touch Screen also using the dedicated connector CN50, whose pinout is
described in the table on the left, instead of using the signals available on LVDS Connector.
This connector is a 1.25mm pitch connector type Molex p/n 53398-0671 or equivalent.
Mating connector: MOLEX 51021-0600 receptacle with MOLEX 50079-8000 female crimp terminals.
TOUCH_INT# and TOUCH_RST# signals available on this connector are exactly the same available on LVDS connector
CN40. Please look at par. 3.3.6. for their description.
US/USBHUB_P4-: USB Hub Downstream Port #4, differential pair
As an alternative, the USB interface on pins #3 and #4 can be replaced by an I2C interface. Please contact your sales rep
for more details about this possibility.
3.3.9
HDMI connector
The Rockchip PX30 SoCs offers, for video output, also a parallel RGB, supporting up to
1920x1080 video resolution
To make this interface suitable for the connection of common table-top displays,
on SBC-D23 board there is an NXP TDA19988 HDMI 1.4a transmitter
Therefore, on-board it is available a standard certified HDMI connector, upright,
type A, WINWIN P/N WHDR-19D1BBNU3N.
Signals involved in HDMI management are the following:
T/TMDS_CLK-: TMDS differential Clock.
TMD/TMDS_LANE0-: TMDS differential pair #0
TMD/TMDS_LANE1-: TMDS differential pair #1
TMD/TMDS_LANE2-: TMDS differential pair #2
SDA: DDC Data line for HDMI panel. Bidirectional signal, electrical level +5V
HDMI
with a 10k
Ω
pull-up resistor.
SCL: DDC Clock line for HDMI panel. Output signal, electrical level +5V
HDMI
with a 10k
Ω
pull-up resistor.
CEC: HDMI Consumer Electronics Control (CEC) Line. Bidirectional signal, electrical level +3P3V_SW with a 27k
Ω
pull-up resistor and Schottky Diode.
Touch
Screen connector CN13
Pin Signal
1
VDD_TOUCH
2
USBHUB_P4-
3
US
4
TOUCH_INT#
5
TOUCH_RST#
6
GND
HDMI Connector CN14
Pin
Signal
Pin
Signal
1
TMD
2
GND
3
TMDS_LANE2-
4
TMD
5
GND
6
TMDS_LANE1-
7
TMD
8
GND
9
TMDS_LANE0-
10
T
11
GND
12
TMDS_CLK-
13
CEC
14
GND
15
SCL
16
SDA
17
GND
18
+5V
HDMI
19
HPD
