LS423 Hardware Interfaces
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This section describes the characteristics and operation of all connectors on the LS423.
Power Connector
The power connector for the LS423 is a USB Micro-B port rated for 5V@2A. The connector is used for power input only—it does not transfer data.
RJ45 LAN
The LS423 has an RJ45 connector for 100BASE-TX networking. The maximum length for Cat 5E cable is 100 meters; the allowed length can be higher or lower depending on the quality of the cable.
USB
The LS423 has a USB 2.0 Type-C port, which is capable of transfer speeds up to 480 Mbit/s.Â
The USB connector can supply up to 500mA of power for peripherals.  The maximum length for a USB cable is 5 meters.
The USB Type-C port will output analog audio if the CC1 or CC2 signal is shorted to ground via a 1K resistor. Analog output can also be enabled in system software. The Dp signal outputs right audio, and the Dn signal outpts left audio.
The following table illustrates the pinout of the USB 2.0 Type-C host port:
pin | Signal Name | Description | Mating Sequence | pin | Signal Name | Description | Mating Sequence |
|---|---|---|---|---|---|---|---|
A1 | GND | Ground return | First | B12 | GND | Ground return | First |
A2 | B11 | ||||||
A3 | B10 | ||||||
A4 | VBUS | Bus power | First | B9 | VBUS | Bus power | First |
A5 | CC1 | Configuration channel | Second | B8 | |||
A6 | Dp1 | Positive half of USB 2.0 differential pair – position 1 | Second | B7 | Dn2 | Negative half of USB 2.0 differential pair – position 2 | Second |
A7 | Dn1 | Negative half of USB 2.0 differential pair – position 1 | Second | B6 | Dp2 | Positive half of USB 2.0 differential pair – position 2 | Second |
A8 | B5 | CC2 | Configuration channel | Second | |||
A9 | VBUS | Bus power | First | B4 | VBUS | Â Bus power | First |
A10 | B3 | ||||||
A11 | B2 | ||||||
A12 | GND | Ground return | First | B1 | GND | Ground return | First |
HDMI Output
The HDMI® output is an HDMI 1.4a connector used to send digital video and audio to HDMI-enabled sink devices. It is capable of outputting a maximum video resolution of 1920x1080x60p.
The following table illustrates the pinout of the HDMI connector:
pin | Description | pin | Description |
|---|---|---|---|
1 | TX2p | 2 | Ground |
3 | TX2n | 4 | TX1p |
5 | Ground | 6 | TX1n |
7 | TX0p | 8 | Ground |
9 | TX0n | 10 | TXCp |
11 | Ground | 12 | TXCn |
13 | CEC | 14 | NC |
15 | DDC SCL | 16 | DDC SDA |
17 | Ground | 18 | +5V DDC |
19 | HPD (Hot Plug Detect) | -- | Â |
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