Leetop A203 User manual
Leetop-203载板用户手册
安全警示及使用注意事项 Notice
服务与支持 Service and Support
DOCUMENT CHANGE HISTORY
Leetop-203产品介绍
简介 Brief
载板接口说明
载板规格
接口位置
接口详述
HDMI (W1)
双层USB 3.0 (W2)
网口 (W3)
DC电源接口 (W4)
后备电池 (W5)
micro-USB (W6)
电源LED (LED)
多功能接口：14PIN(按键) (W7)
多功能接口：40PIN (W8)
M.2 KEY M接口 (W9)
CSI Camera接口 (W10)
多功能接口：20PIN(USB 3.0) (W11)
Micro SD (W12)
风扇接口 (W13)
M.2 KEY E接口 (W14)
硬件安装 A203核心板安装
功能介绍
系统安装 Operating system setup
1.硬件准备 Hardware preparation
2.环境配置 Environment requirements
3.Recovery模式 Recovery mode
4.安装系统镜像 Install system image
5.切换工作模式 Switching working modes
Xshell 的使用
系统配置
查看系统版本
制作备份镜像
安装Jtop工具 Installation of Jtop tools
接入固态硬盘
Developer Tools
JetPack
L4T
DeepStream SDK on Jetson
Isaac SDK
Jetpack 的主要功能 KEY FEATURES IN JETPACK
Sample Applications
开发者工具
No. 2 / 29
A203 Carrier Board
用户手册
沥拓科技
Electronic components and circuits are sensitive to
ElectroStatic Discharge (ESD). When handling any
circuit board assemblies including Leetop Tech COM
Express carrier assemblies, it is recommended that
ESD safety precautions be observed. ESD safe best
practices include, but are not limited to: • Leaving
circuit boards in their antistatic packaging until
they
are ready to be installed. • Using a grounded wrist
strap when handling circuit boards, at a minimum
you should touch a grounded metal object to
dissipate any static charge that may be present on
you. • Only handling circuit boards in ESD safe areas,
which may include ESD floor and table mats, wrist
strap stations and ESD safe lab coats. • Avoiding
handling circuit boards in carpeted areas. • Try to
handle the board by the edges, avoiding contact
with components.
安全警示及使用注意事项 Notice
请在使用本产品前仔细阅读本手册，未经授权的操作会导致错误或意外。制造商对因错误操作而导致设备出现的任 何问
题均不负责。
Please read manual carefully before install, operate, or transport Leetop device.
在给设备供电之前，确保使用正确的电源范围。
Ensure that the correct power range is being used before powering the device.
避免热插拔设备接口。
Avoid hot plugging.
要正确关闭电源，请先关闭Ubuntu系统，然后再切断电源。由于Ubuntu系统的特殊性，在Nvidia的开发套件 (沥拓
套件)上，如启动未完成的时候强行断电，会有0.03%的概率出现异常，进而导致设备无法启动。
To properly turn off the power, please shut down the Ubuntu system first, and then cut off the power. Due to
the particularity of the Ubuntu system, on the Nvidia developer kit, if the power is turned off when the
startup is not completed, there will be a 0.03% probability of abnormality, which will cause the device to fail
to start. Due to the use of the Ubuntu system, the same problem also exists on the Leetop device.
请勿使用本手册提及以外的线缆。
Do not use cables or connectors other than described in this manual.
避免在强磁场环境下使用本设备。
Do not use Leetop device near strong magnetic fields.
长期不使用及运输前需要对数据进行备份。
Backup your data before transportation or Leetop device is idle.
推荐使用原包装进行运输。
Recommend to transport Leetop device in its original packaging.
警告！ 此为A级产品，在生活环境中，该产品可能会造成无线电干扰。在这种情况下，可能需要用户对干扰采 取切
实可行的措施。
ESD Warning
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No. 4 / 29
Document Version date
A203 V1.0 20210620
服务与支持 Service and Support
技术支持 Technical Support
沥拓科技非常愿意帮助你解决关于我们产品的任何问题，或者关于你的应用技术的使用。最快的方法是向我们发送电子邮
Leetop is glad to help you with any questions you may have about our product, or about the use of the technology
for your application. The fastest way is sending us an email: [email protected]
保修 Warranties
保修期：自交付之日起一年
Warranty period: One year from the date of delivery.
保修内容：
leetop保证由我们制造的产品在保修期内没有材料和工艺上的缺陷。在退回任何物品进行维修或更换之前，请联系
品进行维修之前，建议备份您的数据并删除任何机密或个人数据。
Warranty content:
Leetop warrants the product manufactured by us to be free from defects in material and workmanship during
warranty period. Please contact [email protected] for return material authorization (RMA) prior to returning any
items for repair or exchange. The product must be returned in its original packaging to prevent damage during
shipping. Before returning any product for repair, it is recommended to back up your data and delete any
confidential or personal data.
DOCUMENT CHANGE HISTORY
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Feature Carrier for NVIDIA Jetson XAVIER NX/Nano / ORIN NX
PCB Size / Overall Size 87mm x 52mm
Display 1x HDMI
Ethernet 1x Gigabit Ethernet (10/100/1000)
USB
2x USB 3.0 Type A (Integrated USB 2.0)
1x USB 3.0 0.5mm pitch 20P ZIF
1x USB 2.0 15 Pin/1x USB 2.0 Micro-AB
M.2 KEY M 1x M.2 KEY M (NVMe SSD)
Serial 1x CAN
Camera 1x CSI CAMERA
M.2 KEY E PCIE 1x PCIE 2242 SIZE
I2S 1x I2S(3.3V Level)
Misc.
2x I2C Link (+3.3V I/O)
5x GPIO
1x UART
2x SPI
Power Requirements +9V to +19V DC Input @ 3A
Operating Temperature -25℃ to +65°
Weight 100g
Accessories Cables
Leetop-203产品介绍
简介 Brief
Leetop-203是一款嵌入式人工智能计算机，能够为众多终端设备赋予高达21TOPS(INT8)的计算力。Leetop-203提供快速
的被动散热设计，可以满足抗震防静电等工业标准。同时Leetop-203接口丰富，性价比高。
载板接口说明
载板规格
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接口 接口名称 接口说明
W1 HDMI Port HDMI Right Angle Vertical Connector
W2 USB 3.0 Type A USB 3.0 Link 1 Type A Connector
W3 NVIDIA Gigabit Ethernet RJ45 Gigabit Ethernet Connector (10/100/1000)
W4 DC Power DC Input Power TE Connector
W5 3V LITHIUM BATTERY 3V Lithium Battery Connector
W6 USB 2.0 USB 2.0 Link 0 Micro-AB Connector
W7 Multifunctional port 2.54 PITCH 14 PIN
W8 Multifunctional port 2.54 PITCH 40 PIN
W9 M.2 KEY M Disk Disk size 2240
W10 CSI CAMERA0 CONNECT
W11 USB 3.0 ZIF connect 0.5 PITCH 20 PIN
W12 SD Card 1x microSD Card Slot
W13 FAN CONNECT PicoBlade Header
W14 M.2 KEY E PCIE 2242 SIZE
W15 NVIDIA Jetson Nano/NX
Nano/NX 260 PIN Connector
引脚 信号名称 引脚 信号名称
1 TMDS Data2+ 2 TMDS Data2 GND
3 TMDS Data2- 4 TMDS Data1+
5 TMDS Data1 GND 6 TMDS Data1-
7 TMDS Data0+ 8 TMDS Data0 GND
9 TMDS Data0- 10 TMDS Clock+
11 TMDS Clock GND 12 TMDS Clock-
13 CEC 14 NC
15 DDC clock 16 DDC data
17 DDC GND 18 +5V
19 Hot Plug Detect
接口详述
HDMI (W1)
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引脚 信号名称 引脚 信号名称
1 VBUS 2 USB 2.0 D-
3 USB 2.0 D+ 4 GND
5 SSRX- 6 SSRX+
7 GND 8 SSTX-
9 SSTX+ 10 VBUS
11 USB 2.0 D- 12 USB 2.0 D+
13 GND 14 SSRX-
15 SSRX+ 16 GND
17 SSTX- 18 SSTX+
引脚 信号名称 引脚 信号名称
1 TP0+ 2 TP0-
3 TP1+ 4 TP2+
5 TP2- 6 TP1-
7 TP3+ 8 TP3-
引脚 信号名称 引脚 信号名称
1电源DC正2 GND
引脚 信号名称 引脚 信号名称
1 GND 2 BBAT
引脚 信号名称 引脚 信号名称
1 VBUS 2 USB 2.0 D-
3 USB 2.0 D+ 4 USB ID
5 GND
双层USB 3.0 (W2)
网口 (W3)
DC电源接口 (W4)
注：电源输入范围：直流+9V ~ +19V
后备电池 (W5)
micro-USB (W6)
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引脚 信号名称 引脚 信号名称
1 SYS_RST 8 LATCH_SET
2 GND 9 GND
3 RECOVERY 10 UART2_RXD
4 GND 11 CAN_L
5 PWR_BTN- 12 GND
6 GND 13 CAN_H
7 LATCH_SET_BUT 14 GND
引脚 信号名称 引脚 信号名称
1 3.3V 2 5V
3 I2C1_SDA 4 5V
5 I2C1_SCL 6 GND
7 GPIO9_(3.3V_LEVEL) 8 UART1_TXD_3.3V
9 GND 10 UART1_RXD_3.3V
11 UART1_RTS_3.3V 12 I2S0_SCLK_3.3V
13 SPI1_SCLK_3.3V 14 GND
15 GPIO12_(3.3V_LEVEL) 16 SPI1_CS1_3.3V
17 3.3V 18 SPI1_CS0_3.3V
19 SPI0_MOSI_3.3V 20 GND
21 SPI0_MISO_3.3V 22 SPI1_MISO_3.3V
23 SPI0_SCK_3.3V 24 SPI0_CS0_3.3V
25 GND 26 SPI0_CS1_3.3V
27 ID_I2C_SDA_3.3V 28 ID_I2C_SCL
29 GPIO1_(3.3V_LEVEL) 30 GND
31 GPIO11_(3.3V_LEVEL) 32 GPIO7_(3.3V_LEVEL)
电源LED (LED)
插入电源正常开机后，电源LED灯亮（红色）
多功能接口：14PIN(按键) (W7)
注：
“RESET”和”RECOVERY“按键从这个PIN口接入
CAN口在NX核心板可用，在Nano核心板不可用
多功能接口：40PIN (W8)
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引脚 信号名称 引脚 信号名称
33 GPIO13_(3.3V_LEVEL) 34 GND
35 I2S0_LRCK_3.3V 36 UART1_CTS_3.3V
37 SPI1_MOSI_3.3V 38 I2S0_SDIN_3.3V
39 GND 40 I2S0_SDOUT_3.3V
引脚 信号名称 引脚 信号名称
1 GND 2 3.3V
3 GND 4 3.3V
5 PCIE0_RX3_N 6 NC
7 PCIE0_RX3_P 8 NC
9 GND 10 NC
11 PCIE0_TX3_N 12 3.3V
13 PCIE0_TX3_P 14 3.3V
15 GND 16 3.3V
17 PCIE0_RX2_N 18 3.3V
19 PCIE0_RX2_P 20 NC
21 GND 22 NC
23 PCIE0_TX2_N 24 NC
25 PCIE0_TX2_P 26 NC
27 GND 28 NC
29 PCIE0_RX1_N 30 NC
31 PCIE0_RX1_P 32 NC
33 GND 34 NC
35 PCIE0_TX1_N 36 NC
37 PCIE0_TX1_P 38 NC
39 GND 40 I2C2_ CLK
41 PCIE0_RX0_N 42 I2C2_DAT
43 PCIE0_RX0_P 44 M2_KEYM_ALERT
45 GND 46 NC
47 PCIE0_TX0_N 48 NC
49 PCIE0_TX0_P 50 PCIE0_RST_N
M.2 KEY M接口 (W9)
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引脚 信号名称 引脚 信号名称
51 GND 52 PCIE0_CLKREQ_N
53 PCIE0_CLK_N 54 M2_KEYM_PEWAKE
55 PCIE0_CLK_P 56 NC
57 GND 58 NC
59 NC 60 32.768KHz
61 NC 62 3.3V
63 GND 64 3.3V
65 GND 66 3.3V
67 GND
引脚 信号名称 引脚 信号名称
1 GND 2 CSI_A_D0_N
3 CSI_A_D0_P 4 GND
5 CSI_A_1_N 6 CSI_A_D1_P
7 GND 8 CSI_A_CLK_P
9 CSI_A_CLK_N 10 GND
11 CAM1_PWDN 12 CAM1_MCLK
13 CAM_I2C_SCL 14 CAM_I2C_SDA
15 +3.3V
引脚 信号名称 引脚 信号名称
1 5V 11 USB3.0_SSTX_N
2 5V 12 USB3.0_SSTX_P
3 5V 13 GND
4 5V 14 USB3.0_SSRX_N
5 5V 15 USB3.0_SSRX_P
6 GND 16 GND
7 USB2.0_DN 17 GND
8 USB2.0_DP 18 GND
9 GPIO_01 19 GND
CSI Camera接口 (W10)
多功能接口：20PIN(USB 3.0) (W11)
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引脚 信号名称 引脚 信号名称
10 GND 20 GND
引脚 信号名称 引脚 信号名称
1 SDIO_DATA2 2 SDIO_DATA3
3 SDIO_CMD 4 SDIO_VCC
5 SDIO_CLK 6 GND
7 SDIO_DATA0 8 SDIO_DATA1
9 GND 10 SD_DET
引脚 信号名称 引脚 信号名称
1 GND 2 +5V
3 FAN_TACH 4 FAN_PWM
引脚 信号名称 引脚 信号名称
1 GND 2 3V3
3 USB1_DP 4 3V3
5 USB1_DN 6 NC
7 GND 8 I2S1_SCLK
9 NC 10 I2S1_LRCK
11 NC 12 I2S1_SDIN
13 NC 14 I2S1_DOUT
15 NC 16 NC
17 NC 18 GND
19 NC 20 BT_M2_WAKE
21 NC 22 UART0_RXD
23 NC 24 UART0_TXD
25 GND 26 UART0_CTS
27 PCIE1_TX0_P 28 UART0_RTS
29 PCIE1_TX0_N 30 NC
Micro SD (W12)
风扇接口 (W13)
注：风扇FAN不支持风扇转速控制。
M.2 KEY E接口 (W14)
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引脚 信号名称 引脚 信号名称
31 GND 32 NC
33 PCIE1_RX0_P 34 NC
35 PCIE1_RX0_N 36 NC
37 GND 38 NC
39 PCIE1_CLK_P 40 NC
41 PCIE1_CLK_N 42 CLK_32K
43 GND 44 PCIE1_RST
45 PCIE1_CLKREQ 46 W_DISABLE2
47 PCIE1_WAKE 48 W_DISABLE1
49 GND 50 I2C2_SDA
51 NC 52 I2C2_SCL
53 NC 54 M2_E_ALERT
55 GND 56 NC
57 NC 58 NC
59 NC 60 NC
61 GND 62 NC
63 NC 64 3V3
65 NC 66 3V3
67 GND
注：M.2 KEY E接口在NX核心板可用，在Nano核心板不可用
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硬件安装 A203核心板安装
核心板安装
为了正确安装Jetson Xavier NX模块，请遵循顺序和安装硬件说明。
以下是一些建议的装配指南:
1. 在模块上装配散热解决方案。
2. 安装模块
a) 从底板开始，底板要有合适的支柱以配合SODIMM连接器的高度。
b) 以25-35度的角度将模块完全插入SODIMM连接器中。
c) 按照弧线方式放下模块板，直到SODIMM连接器的锁扣啮合。
d) 用螺钉将模块固定在底板上，并将其固定在支架/垫片上。开发者套件（如图3 2所示）使用支座和螺钉将模块固
定在系统/基板上。
To install the Jetson Xavier NX module correctly, follow the sequence and mounting hardware instructions:
Here are some suggested assembly guidelines.
1. Assemble any required thermal solution on the module.
2. Install the module
a) Start with baseboard that has suitable standoff to match SODIMM connector height.
b) Insert module fully at an angle of 25-35 degree into the SODIMM connector.
c) Arc down the module board until the SODIMM connector latch engages.
d) Secure the module to the baseboard with screws into the standoff/spacer. The developer kit (shown in
Figure 3 2) uses a standoff and screws to secure the module to the system/base- board.
图2
功能介绍
系统安装 Operating system setup
1.硬件准备 Hardware preparation
Ubuntu18.04系统的PC主机 1台
Ubuntu 18.04 PC x1
micro-USB数据线 1条
Micro-USB data cable x1
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2.环境配置 Environment requirements
将A203配套的系统镜像包下载到Ubuntu18.04系统的PC主机上：
203_nx jetpack4.4 dp 镜像：
链接：https://pan.baidu.com/s/1AMzUgORxD9g7gbxB1Se9mw
提取码：flss
203 nano jetpack4.3镜像：
链接：https://pan.baidu.com/s/1-Or7v-ZwJxdpm4IZedDIBw
提取码：0bd6
其余资料请联系我们索取：[email protected]
解压镜像包，并进入Linux for Tegra(L4T)目录
该工具在刷机时会使用USB大量存储，因此在刷机时需要暂时禁用自动装载新外部存储设备功能，在Ubuntu可用以
下指令：
安装刷机工具依赖库
Download the system image package of A203 on the PC of Ubuntu 18.04 system
203_nx jetpack4.4 dp 镜像：
Link：https://pan.baidu.com/s/1AMzUgORxD9g7gbxB1Se9mw
Extraction Code：flss
203 nano jetpack4.3镜像：
Link：https://pan.baidu.com/s/1-Or7v-ZwJxdpm4IZedDIBw
Extraction Code：0bd6
Please contact us for the rest of the information：[email protected]
Unzip the image package and enter the Linux for Tegra (L4T) directory
This tool makes use of USB mass storage during flashing; therefore, automount of new external storage
device needs to be disabled temporarily during flashing. On most distributions of Debian-based Linux, you
can do this using the following command:
cd nx_nvme_jp4.6
cat mfi_jetson_xavier_nx_devkit.tar.gz* > mfi_jetson_xavier_nx_devkit.tar.gz
tar mfi_jetson-xavier-nx-devkit.tar.gz
cd mfi_jetson-xavier-nx-devkit-emmc
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4
# For Debian-based Linux
systemctl stop udisks2.service
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# For Debian-based Linux
sudo apt install libxml2-utils simg2img network-manager abootimg sshpass
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cd nx_nvme_jp4.6
cat mfi_jetson_xavier_nx_devkit.tar.gz* > mfi_jetson_xavier_nx_devkit.tar.gz
tar mfi_jetson-xavier-nx-devkit.tar.gz
cd mfi_jetson-xavier-nx-devkit-emmc
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This tool requires the host to have the following dependencies:
3.Recovery模式 Recovery mode
A203可以通过 USB 进行系统更新，更新需要进入USB Recovery 模式。USB Recovery 模式下可以进行文件系统更新，内
核更新，boot loader 更新，BCT 更新等操作。
进入Recovery模式的步骤：
1. 关闭系统电源，请确保使电源关闭而不是进入待机状态；
2. 使用 micro-USB 到 USB Type A 的链接线链接载板和主机；
3. 对设备进行上电；
4. 保持按下 RECOVERY 按键的同时按下并释放RESET按键，等待 2 秒释放RECOVERY 按键。
注：在进入 USB Recovery 模式下，系统不会启动，串口不会有调试信息输出
To use USB update, you need to enter USB recovery mode. In USB recovery mode, it can update the file system,
kernel, boot loader and BCT.
Steps to enter recovery mode:
1. Turn off the system power, make sure that the power is turned off instead of in standby mode.
2. Use the micro-USB link line to connect the carrier and the host.
3. Power on.
4. Press and hold the recovery key first, then press and hold the power key. When the light is on, release the
power key, wait for 2S and release the recovery key. Or in the power on state, press and hold the reset key
and recovery key, release the reset key for 2S, and then release the recovery key.
Note:
Please follow the steps of the update manual for system update.
when entering USB recovery mode, the system will not start, and the serial port will not have debugging
information output`.
4.安装系统镜像 Install system image
a) 将Ubuntu18.04主机的USB Type-A与A203的micro-USB相连；
b) 给A203上电，并进入Recovery模式;
c) PC主机进入L4T目录，执行刷机指令：
d) 刷机完成后，给A203重新上电登录系统。
a) Connect USB type-A of Ubuntu 18.04 Host to micro-USB of A203;
b) Power up A203 and enter Recovery mode(RCM);
# For Debian-based Linux
systemctl stop udisks2.service
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2
# For Debian-based Linux
sudo apt install libxml2-utils simg2img network-manager abootimg sshpass
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2
cd mfi_jetson-xavier-nx-devkit-emmc
sudo ./tools/kernel_flash/l4t_initrd_flash.sh --flash-only --massflash $num --showlogs
# 上述指令是可以同时支持多台下载，$num 取值不超过5，建议不超过两台
# showlogs 主要是显示刷机log
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4
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c) The PC Host enters the L4T directory and executes the flashing instruction：
d) After flashing, power on A203 again and log in to the system.
5.切换工作模式 Switching working modes
登录系统后，可在系统界面右上角点击操作修改，如图所示：
After logging in to the system, you can modify the operation by clicking on the top right corner of the system
interface, as shown in the picture：
或者，在终端输入命令进行切换：
Alternatively, switch by entering the following command in the terminal：
Xshell 的使用
Xshell 是一个强大的安全终端模拟软件，它支持SSH1, SSH2, 以及Microsoft Windows 平台的TELNET 协议。Xshell 通
过互
联网到远程主机的安全连接以及它创新性的设计和特色帮助用户在复杂的网络环境中享受他们的工作。Xshell 可以在
Windows 界面
下用来访问远端不同系统下的服务器，从而比较好的达到远程控制终端的目的。xshell 不是必需品，但是它能更好的辅助
我们使用
设备.他可以将你的Windows 系统和你的Ubuntu 系统链接起来，让你在Windows 系统下，去操作你的Linux 系统。安装
xshell 可
以在网上百度搜索下载安装即可.(当产品无法进入桌面系统的情况时,也可以通过xshell 来进行远程控制,修改配置上的错
误).
打开xshell
cd mfi_jetson-xavier-nx-devkit-emmc
sudo ./tools/kernel_flash/l4t_initrd_flash.sh --flash-only --massflash $num --showlogs
# The above instructions can support multiple downloads at the same time.
# The value of $num is no more than 5. It is recommended that there be no more than two
# The 'showlogs' display the flashing log
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5
# 切换到模式0,可用-q参数查看当前模式 Switch to mode 0, use the -q parameter to view the current
mode
sudo nvpmodel -m 0
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新建
填写名称以及主机ip(正常情况下可以通过网络ip 来连接,若不知道ip 的情况下,可以通过usb 数据线连接电脑和设备
OTG 口,填写固定ip来进行连接)
192.168.55.1 1
No. 19 / 29
输入用户和密码
点击连接进入命令行界面
No. 20 / 29
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