Edge-RT300

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1 Introduction

Overview

Front

Back

• The Edge-RT300 is designed and developed by FriendlyELEC for professional and enterprise users. It is based on SOM-4418.
• The Edge-RT300 has rich interconnection interfaces, including dual RJ45 ethernet ports, Wi-Fi, BT, 4G, RS-485 and M-BUS master, which makes it suitable for IoT applications.

2 Hardware Spec

• CPU Board: SOM-4418
  • SoC：Samsung S5P4418 Quad Core Cortex-A9 with dynamic frequency scaling up to 1.4G Hz
  • System Memory：1GB 32bit DDR3 RAM
  • eMMC：8GB
• Connectivity：
  • One 10/100/1000Mbps Ethernet Port (Native MAC， PHY is RTL8211E) with unique MAC, support WOL(Wake On Lan)
  • One 10/1000Mbps Ethernet Port (USB to LAN, RTL852B)
  • One MiniPCIe Socket & MicroSIM Card Slot for 4G module
  • One 802.11b/g/n Wi-Fi & Bluetooth 4.0 (AP6212)
  • One TTL to RS-485 converter
  • One TTL to wired M-BUS Master converter
• Video Input: MIPI-CSI
• Video Output: LVDS
• Audio: 2-Chanel headphone output, one Microphone input
• USB: 1 x USB 2.0 Host(Via USB Hub), 1 x USB 2.0 OTG
• LED: 1 x power LED , 2 x User LED
• Key: 1 x User Key, PowerKey, Reset key, SD/MMC Boot Select key
• Other Resource: 1 x MicroSD, RTC battery input, 2-pin ZH connector for 5V cooling fan
• Power: DC 12V/2A
• PCB: Four Layer, 96 mm x 90 mm x 1.6mm
• Working Temperature: -40℃ to 70℃

3 Detailed description

layout

3.1 RS-485&M-BUS

RS485&M-BUS

Connector Pitch: 3.5mm

Pin#	1	2	3	4	5	6
Name	12V	GND	A	B	L1	L2
Description	12V Power input(optional)	GND	RS-485 A	RS-485 B	M-BUS L1	M-BUS L2

' RS-485

• Use SN65HVD3082EDR RS-485 Transceivers, support 1/8 Unit Load—Up to 256 Nodes on a Bus, Bus-Pin ESD Protection Up to 15 kV.
• Connetected to UART2.

M-Bus Master

• Connetected to UART3.
• support up to 40 slaves.
• about M-bus, refer to https://m-bus.com/documentation

3.2 MIPI-CSI&Audio

Pinout

Pin#	Name	Description
1	3.3V out	3.3V Power Output
2	3.3V out	3.3V Power Output
3	GND	Ground
4	I2C0_SDA	I2C bus0 data
5	I2C0_SCL	I2C bus0 clock
6	GND	Ground
7	AUDIO_GND	Audio Common terminal
8	HP_R	Headphone output R
9	HP_L	Headphone output L
10	MICIN_P	Microphone input P
11	GND	Ground
12	GPIOB23	GPIO
13	GPIOC2	GPIO
14	GPIOC13/PWM1	GPIO or PWM
15	GND	Ground
16	GPIOB27/HP_DETECT	GPIO, or Headphone insert detect
17	/NC
18	GND	Ground
19	/NC
20	/NC
21	GND	Ground
22	MIPI_CSI0_D1N	MIPI CSI Data0
23	MIPI_CSI0_D1P
24	GND	Ground
25	MIPI_CSI0_D0N	MIPI CSI Data1
26	MIPI_CSI0_D0P
27	GND	Ground
28	MIPI_CSI0_CLKN	MIPI CSI Clock
29	MIPI_CSI0_CLKP
30	GND	Ground

3.3 LVDS

Pin#	Name	Description
1	5V	5V Power output
2	5V	5V Power output
3	5V	5V Power output
4	LVDS_Y0M	LVDS D0-
5	LVDS_Y0P	LVDS D0+
6	GND	Ground
7	LVDS_Y1M	LVDS D1-
8	LVDS_Y1P	LVDS D1+
9	GND	Ground
10	LVDS_Y2M	LVDS D2-
11	LVDS_Y2P	LVDS D2+
12	GND	Ground
13	LVDS_CLKM	LVDS Clock-
14	LVDS_CLKP	LVDS Clock+
15	GND	Ground
16	LVDS_Y3M	LVDS D3-
17	LVDS_Y3P	LVDS D3+
18	GND	Ground
19	/NC
20	GND	Ground
21	LCD_SCL	for touch pannel，and backlight control，etc
22	LCD_SDA
23	LCD_TPINT
24	GND	Ground

3.4 USB Host

The 10/100Mbps USB-LAN, MiniPCIe and USB Type-A share the USB 2.0 480Mbps bandwidth.

3.5 User LEDs

LED	LED1	LED2
GPIO	GPIOB30	GPIOB31
ON logic	0	0

3.6 User Key

This key is connected to AliveGPIO3 of the SoC.

3.7 RJ45 Ethernet

10/100/1000Mbps Ethernet support WOL(Wake On Lan) function. The following steps shows how to enable this function. a) disable NetworkManager first b) install ethtool c) add following lines to /etc/network/interfaces

   {{auto eth0
   iface eth0 inet dhcp
   ethernet-wol g}}

3.8 debug console

The baud rate is 115200bps.

3.9 Power Supply

Load to	MiniPCIe	USB Type-A	USB OTG	LVDS	MIPI-CSI&Audio
Output Voltage	3.5V	5V	5V	5V	3.3V
Recommended Load	2A	0.5A	0.5A	0.3A	0.3A
Max allowed Load	3A	1A	1A	0.5A	0.5A
	10W Max totally