Edge-RT300/zh
From FriendlyELEC WiKi
Contents
1 简介
- Edge-RT300是基于SOM-4418设计的一款针对物联网应用的开发板。它配备了双有线以太网，Wi-Fi，蓝牙，4G，RS-485，M-Bus总线接口，非常适合做物联网网关。
2 硬件特性
- 核心板: 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
- 互联接口：
- 一个原生千兆以太网（PHY 是 RTL8211E） ，拥有全球唯一MAC地址，支持网络唤醒（WoL）功能
- 一个USB2.0转百兆以太网（RTL852B）
- 一个 MiniPCIe 插槽 和一个MicroSIM卡座子，用于扩展4G模块
- 集成802.11b/g/n Wi-Fi和 Bluetooth 4.0 模块(AP6212)
- 一路 TTL 转 RS-485 接口
- 一路 TTL 转 有线M-BUS Master 接口
- 视频输入: MIPI-CSI
- 显示接口: LVDS
- 音频: 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
- 其它: 1 x MicroSD, RTC battery input, 2-pin ZH连接器风扇接口
- Power: DC 12V/2A
- PCB: Four Layer, 96 mm x 90 mm x 1.6mm
- Working Temperature: -40℃ to 70℃
3 详细描述
3.1 RS-485&M-BUS
引脚间距: 3.5mm
| Pin# | 6 | 5 | 4 | 3 | 2 | 1 |
|---|---|---|---|---|---|---|
| Name | L2 | L1 | B | A | GND | 12V |
| Description | M-BUS L2 | M-BUS L1 | RS-485 B | RS-485 A | GND | 12V Power input(optional) |
RS-485
- 使用SN65HVD3082EDR RS-485 收发器, 支持 1/8 Unit Load—多大 256 个节点, ESD防护高达15 kV。
- 波特率: 0.2Mbps MAX
- 连接到UART2.
M-Bus Master
- 连接到UART3。
- 支持多大40个从设备。
- 波特率: 2400~9600
- 关于M-bus, 可参考 https://m-bus.com/documentation
3.2 MIPI-CSI&Audio
引脚定义'
| 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
百兆以太网, MiniPCIe 和 USB Type-A 共享 USB 2.0 480Mbps 带宽.
3.5 User LEDs
| LED | LED1 | LED2 |
|---|---|---|
| GPIO | GPIOB30 | GPIOB31 |
| 点亮灯的逻辑 | 0 | 0 |
3.6 User Key
这个按键连接到AliveGPIO3上。
3.7 RJ45 Ethernet
千兆以太网支持WOL（局域网唤醒）功能。 以下步骤显示了如何启用此功能。
a) 首先禁用NetworkManager
b) 安装ethtool
c) 把以下3行添加到/etc/network/interfaces
auto eth0 iface eth0 inet dhcp ethernet-wol g
3.8 调试串口
波特率是 115200bps.
3.9 Power Supply
| 负载 | MiniPCIe | USB Type-A | USB OTG | LVDS | MIPI-CSI&Audio |
|---|---|---|---|---|---|
| 输出电压 | 3.5V | 5V | 5V | 5V | 3.3V |
| 推荐负载 | 2A | 0.5A | 0.5A | 0.3A | 0.3A |
| 最大允许负载 | 3A | 1A | 1A | 0.5A | 0.5A |
| 总共不要超过10W | |||||
4 Schematics & Mechanical drawing
- PCB Dimension(Edge-RT300_2003_dxf.zip)
- Schematic(Edge-RT300-2003-Schematic.pdf)
