ROM-8720 user guide
Contents
資源特性(Features)
- NXP LS1046A Cortex®-A72 COM Express Type 7 Computer-on-Module
- COM Express® Type 7 Compact Module
- Up to 4 Cores, 1.6GHz
- One Channel DDR4 SODIMM, max. 16GB (Both ECC & Non-ECC)
- Up to 10GbE x2 and GbE x4
- PCIe 3.0 x3, PCIe 2.0 x2, USB 3.0 x3 and USB2.0 x2
- Support Ubuntu BSP
訂購資訊(Ordering Information)
接口布局和尺寸(Layout and Sizes)
ROM-8720 接口布局圖 Board Dimension Layout
SOM-DB5920-00A1 接口布局圖 Board Dimension Layout
主板内置插针式引脚排序方式 (Pin Header defination)
Connector List
| Position | Description |
| ATX1 | ATX Connector |
| CN1 | COM Express Connector |
| COM1 | UART Connector (Tx, Rx) |
| COM2 | UART Connector (Tx, Rx) |
| DCIN1 | Wide Range DC Input Connector1 |
| GPIO1 | GPIO Pin Header |
| I2C1 | I2C Wafer Box |
| LAN0_USB01 | LAN0, USB3.0/2.0 Port0 and Port1 Connector |
| LAN1_USB23 | LAN1, USB3.0/2.0 Port2 and Port3 Connector |
| LPC_PH1 | Low Pin Count Pin Header |
| PCIEX16_0 | PCIe x16 slot |
| PCIEX8_1 | PCIe x8 slot |
| PCIEX4_0 | PCIe x4 slot |
| BH1 | RTC Battery Connector |
| CPU_FAN1 | Smart Fan Connector |
| SMB1 | SMBus Wafer Box |
| SYS_FAN1 | System Fan Connector |
| SPI_CN1 | SPI BIOS PIN HEADER |
| OCP module connector | OCP module connector |
| SPI_BIOS1 | SPI BIOS Socket |
| DCIN2 | Wide Range DC Input Connector2 |
| PCIEX4_1 | PCIe x4 slot |
| SATA0 | SATA Connector |
| SATA1 | SATA Connector |
| VGA | CRT Connector |
Jumper, Switch, Button List
| Position | Description |
| J8, J9 | SOM-DB5920 Voltage Input (VIN) Selection |
| J11 | COMe Module +V5SB supply |
| J14 | ATX / AT Mode Selection |
| J15 | Carrier Board SPI power supply |
| J16 | Front Panel Connector |
| J18 | Normal Operation / Clear COMS Selection |
| J19 | BMC software Enable Disable Selection |
| J100 | OCP 10G Fibber & Copper SEL |
| J101 | OCP I2C & MDIO SEL |
| J102 | PCIE1X0 to PCIEX4 slot & BMC SEL |
| J103 | PCIE1X4 to PCIEX4 slot & BMC SEL |
| J104 | USB2&3 Port to LAN_USB_23 & BMC SEL |
| J106 | LPC Pin Header Reset SEL |
| SW_LPC_TPM1 | TPM Enable/Disable Switch |
| SW_LPC_TPM2 | TPM Enable/Disable Switch |
| CB_PWROK | PWROK Signal Pull Down or Floating Selection |
| PWRBTN1 | Power Button |
| RESET1 | Reset Button |
| SLEEP1 | Sleep Button |
| EXT_THRM_1# | External Thermal Trip Button |
| WAKE_1# | Wake Button |
| LID1 | LID Button |
| RAPID1 | Rapid shutdown button |
机械尺寸 (Mechanical Characteristics)
ROM-8720
快速入门 (Quick Start)
系统下载 (OS Download)
- Linux系统 (Linux OS)
OS Support List (based on Ubutu 18.04)
Linux 燒錄方法 (Linux Flash eMMC Method)
Debug 串口調試 (Debug port Setting)
以 Tera Term 为例介绍如何使用串口调试功能
Baud Rate波特率：115200 Data 数据位：8 Parity 奇偶校验：无 Stop 停止位：1 Flow Control流控：无
Tera Term Tool
Check the Sriel port in Device Manager (查看PC端的串口号)：
if you can not identify the Serial device , please check your serial driver.
Debug port connection (串口連接)
Log into Terminal Tool (进入串口调试终端)：
Linux系统的基本使用(Linux System Basic Operating Method)
乙太網路使用方法(Ethernent Testing Method)
LAN function check
CN12 (down): fm1-mac3
CN12(up): fm1-mac4
CN13(down): fm1-mac5
CN13(up): fm1-mac6
Command :
# ip a
Up and ping with I/F fm1-mac3:
# ifconfig fm1-mac3 up
# dhclient –d fm1-mac3
# ping 8.8.8.8
Up and ping with I/F fm1-mac4:
# ifconfig fm1-mac4 up
- dhclient –d fm1-mac4
ping 8.8.8.8
Up and ping with I/F fm1-mac5:
# ifconfig fm1-mac5 up
# dhclient –d fm1-mac5
# ping 8.8.8.8
ROM-EG60 Function:
RJ45_CN1: fm1-mac9
RJ45_CN2: fm1-mac10
Command : ip a
- ifconfig fm1-mac9 up
- ifconfig fm1-mac10 up
Up and ping with I/F fm1-mac9:
# dhclient –d fm1-mac9
# ping 8.8.8.8
- Up and ping with I/F fm1-mac10:
# dhclient –d fm1-mac10
#ping 8.8.8.8
Ping google.com
Edit /etc/resolv.conf to add nameserver
- ping google.com
WiFi使用方法(WIFI Testing Method)
串口使用方法(Serial Port Operating Method)
RS-232 Test
CN15上(SER0/UART3): /dev/ttymxc2
CN15 下(SER2/UART1): /dev/ttymxc0
COM 3 (A53 debug/SER3/UART2): /dev/ttymxc1
COM 1 (M4 debug/SER1/UART4): /dev/ttymxc3
SW7 Setting (SW7設置)
MODE1 MODE0
0 0 LOOPBACK
0 1 RS232
1 0 RS485
1 1 RS422
Loopback test (eg. ttymxc0)
Connect loopback test tool
- stty ‐F /dev/ttymxc0 115200
# stty ‐F /dev/ttymxc0 ‐echo
# cat /dev/ttymxc0 &
# echo test > /dev/ttymxc0
蓝牙使用方法(BlueTooth Operating Method)
Command : $ hciconfig hci0 up $ bluetoothctl $ discoverable on $ pairable on $ scan on [NEW] FC:18:3C:8D:75:F4 myphone $ scan off $ pair FC:18:3C:8D:75:F4 $ connect FC:18:3C:8D:75:F4
遠程訪問及文件傳輸(Remote Access and File Transimmion)
查看主板IP位址 ( Chech IP Address )：
Command : ifconfig
Windows下SSH访问及文件传输
SSH Remote Log into Device
- SSH远程登录,以putty选择putty.exe(或者使用Xshell、SecureCRT等类似软件)
- 需要设置远程设备的IP、通讯端口(默认22)、通讯方式，登录后验证用户名密码
通用方法(General Method)
查看CPU温度(Check CPU Temperature)
查看CPU频率(Check CPU Frequency)
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
>> 900000
cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
>> 1200000
查看内存容量(Check Memory Capacity)
busybox free -m
查看存储容量(Check Storage Capacity)
busybox df -h
網路Ping測試(Ping Network Testing)
ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=54 time=2.10 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=54 time=2.10 ms
設置RTC (RTC Setting)