LS423 Hardware Interfaces

 

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. 

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

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

 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

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)

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