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ArmSoM-CM1 Product Specification

1.1 Product Introduction​

ArmSoM-CM1 is a computer-on-module (COM) based on the Rockchip RK3506J (tri-core Cortex-A7 + single-core Cortex-M0). It features a rich set of peripheral interfaces such as SAI, USB2 OTG, RMII, and CAN. This module meets minimum system requirements and includes an onboard Type-C power & programming port, MIPI DSI display interface, and an SD card expansion slot.

The ArmSoM-CM1 Kit consists of the CM1 module paired with the CM1-IO carrier board, offering even richer peripheral resources: dual 10/100 Ethernet ports, dual USB2.0 Host ports, onboard WiFi, MIPI DSI display interface, headphone jack, microphone input, and 72 GPIOs routed from the core module.

The ArmSoM-CM1 Kit development suite provides full-stack Linux system development documentation and open-source software resources. Enterprise customers can directly purchase the core module for end-product development. ArmSoM delivers complete system source code (including kernel customization patches, peripheral drivers, and toolchains) as open-source hardware, significantly accelerating customer product development cycles.

To maximize enterprise development efficiency and shorten R&D cycles, we systematically integrate the following full lifecycle development resources for core module users:

​1. Hardware Design Assets

- Core Module / Carrier Board Reference Schematics (including high-speed signal integrity design guidelines)
- Mechanical Structure 3D Models (STEP format)
- Key Component Footprint Libraries
- Industrial Connector Specifications and Interface Definition Manuals

​2. Software Delivery Suite

- Pre-validated Factory System Images (Built with Buildroot)
- Cross-compilation Toolchain
- Board Support Package (BSP) & Device Tree Configuration Templates
- Modular Peripheral Driver Development Framework

1.2 Application Areas​

The RK3506J finds wide application across various fields, including industrial control, smart appliance display control, HMI (Human-Machine Interface), and industrial information & data processing.

CM1 User Manual​

📝

CM1 User Manual

Getting Started with your CM1

Hardware Information​

CM1 Hardware Interfaces​

ArmSoM-CM1-front & back

CM1 Hardware Specifications​

CategorySpecificationCategorySpecification
SOC
  • RockChip RK3506j
    		• CPU
  • RK3506 Tri-core Cortex-A7 Processor
    • GPU
  • 2D Graphic Engine
  • Integrated High-Performance 2D Acceleration Hardware
    		• Memory
  • 256/512MB DDR3L
    • Storage
  • 256/512MB NAND Flash
  • Supports MicroSD Card Expansion
    		• Video Output
  • 1 x MIPI DSI (2Lane, 1.5Gbps)
    • 40-PIN & 44-PIN
  • Exposes all remaining functions of the RK3506J chip
    		• Buttons
  • 1x Maskrom Key (for entering maskrom programming mode)
    • Power Supply
  • Type-C 5V
    		• OS Support
  • Officially supported by Rockchip: Buildroot
    • Dimensions
  • 70 mm x 42mm
    		• Operating Temperature
  • -40°C ~ 85°C

    • CM1-IO Hardware Interface​

    ArmSoM-CM1-io

    CM1-IO Hardware Specifications​

    CategorySpecificationCategorySpecification
    40-PIN & 44-PIN Female Header
  • Expands remaining core module functions
    		• 40-PIN Header
  • Partially pin-compatible with Raspberry Pi 40pin for connecting rich accessory peripherals
  • Supports UART/SPI/I2C/I2S/PWM/5V Power/3.3V Power
    • USB Interfaces
  • 1 × Type C (Power & Programming Only)
  • 2 × USB2.0 HOST
    		• Networking
  • 2 × 10/100 Ethernet Ports
  • 1 × WiFi5/BT4.2
    • Audio
  • 1 × Audio Jack (Headphone/Mic)
    		• 14-PIN Header
  • Supports RS485/CAN/MICIN/SPK
    • Power Supply
  • Type-C 5V
  • DC 12V Jack
    		• OS Support
  • Officially supported by Rockchip: Buildroot
    • Dimensions
  • 100 mm x 70mm
    		• Operating Temperature
  • -40°C ~ 85°C

    • RK3506j Block Diagram​

    RK3506j Block Diagram
    rk3506j block diagram

    Pin Definitions​

    40-PIN Header
    GPIO NumberFunctionPinPinFunctionGPIO Number
    +3.3V
    1
    2
    		+5.0V
    4RM_IO4/SAI0_SDI0/GPIO0_A4_d
    3
    4
    		+5.0V
    5RM_IO5/SAI0_SDI1/GPIO0_A5_d
    5
    6
    		GND
    59DSMC_SLV_RDYN/RM_IO31/UART5_RX_M1
    FLEXBUS0_D0/DSMC_CSN3/VO_LCDC_D0
    GPIO1_D3_d
    7
    8
    UART0_TX
    RM_IO22/JTAG_TCK_M1/GPIO0_C6_u    		22
    GND
    9
    10
    UART0_RX
    RM_IO23/JTAG_TMS_M1/GPIO0_C7_u    		23
    58DSMC_SLV_CSN0/RM_IO30/UART5_TX_M1
    FLEXBUS0_D1/DSMC_CSN2/VO_LCDC_D1
    GPIO1_D2_d
    11
    12
    		GPIO1_D1_d/DSMC_SLV_D7
    RM_IO29UART5_RTSN_M1/DSM_AUD_LP_M0
    FLEXBUS0_D2/DSMC_DQS1/VO_LCDC_D2    		57
    52DSMC_SLV_D2/FLEXBUS0_D7
    DSMC_D11/VO_LCDC_D7
    GPIO1_C4_d
    13
    14
    		GPIO1_C5_d
    DSMC_SLV_D3/FLEXBUS0_D6
    DSMC_D12/VO_LCDC_D6    		53
    51DSMC_SLV_D1/RM_IO28/SAI2_SDO_M1
    FLEXBUS1_CSN_M5/FLEXBUS0_D8
    DSMC_D10/VO_LCDC_D8
    GPIO1_C3_d
    15
    16
    		GPIO1_C2_d
    DSMC_SLV_D0/RM_IO27SAI2_SDI_M1
    FLEXBUS0_CSN_M5/DSM_AUD_RP_M0
    FLEXBUS0_D9/DSMC_D9/VO_LCDC_D9    		50
    +3.3V
    17
    18
    		GPIO1_C1_d/DSMC_SLV_DQS0/SAI2_MCLK_M1
    FLEXBUS1_CSN_M4/DSM_AUD_RN_M0
    FLEXBUS0_CLK/DSMC_D8/VO_LCDC_D10    		49
    48DSMC_SLV_CLK/FLEXBUS0_CSN_M4
    DSMC_INT1/FLEXBUS1_CLK
    DSMC_RESETN/VO_LCDC_D11
    GPIO1_C0_d
    19
    20
    		SARADC_IN2/GPIO4_B2_z138
    46FLEXBUS0_CSN_M3/FLEXBUS0_D11
    FLEXBUS1_D14/DSMC_CSN0
    VO_LCDC_D13/GPIO1_B6_d
    21
    22
    		GPIO1_B7_d
    FLEXBUS1_CSN_M3/FLEXBUS0_D10
    FLEXBUS1_D15/DSMC_RDYN/VO_LCDC_D1    		47
    44FLEXBUS0_CSN_M2/FLEXBUS0_D13
    FLEXBUS1_D12/DSMC_D6
    VO_LCDC_D15GPIO1_B4_d
    23
    24
    		GPIO1_B5_d
    FLEXBUS1_CSN_M2/FLEXBUS0_D12
    FLEXBUS1_D13/DSMC_D7/VO_LCDC_D14    		45
    GND
    25
    26
    		GPIO1_B3_d
    RM_IO26/SAI2_LRCK_M1FLEXBUS1_CSN_M1
    FLEXBUS0_D14/FLEXBUS1_D11
    DSMC_INT3/VO_LCDC_D16    		43
    41RM_IO24/UART5_CTSN_M1
    FLEXBUS1_CSN_M0/FLEXBUS1_D9
    DSMC_CSN1/VO_LCDC_D184
    GPIO1_B1_d
    27
    28
    		GPIO1_B2_d
    RM_IO25/SAI2_SCLK_M1FLEXBUS0_CSN_M1
    FLEXBUS0_D15/FLEXBUS1_D10
    DSMC_INT2/VO_LCDC_D17    		42
    40FLEXBUS0_CSN_M0/FLEXBUS1_D8
    DSMC_D5/VO_LCDC_D19
    GPIO1_B0_d
    29
    30
    		GND
    38FLEXBUS1_D6/DSMC_D3
    VO_LCDC_D21/GPIO1_A6_d
    31
    32
    		GPIO1_A7_d/FLEXBUS1_D7
    DSMC_D4/VO_LCDC_D20    		39
    37FLEXBUS1_D5/DSMC_D2VO_LCDC_D22
    GPIO1_A5_d
    33
    34
    		GND
    35FLEXBUS1_D3/DSMC_D0/VO_LCDC_CLK
    GPIO1_A3_d
    35
    36
    		GPIO1_A4_d/FLEXBUS1_D4
    DSMC_D1/VO_LCDC_D23    		36
    33DSMC_SLV_INT/DSMC_INT0
    FLEXBUS1_D1/DSMC_CLKN
    VO_LCDC_VSYNC/GPIO1_A1_d
    37
    38
    		GPIO1_A2_d/FLEXBUS1_D2
    DSMC_DQS0/VO_LCDC_HSYNC    		34
    GND
    39
    40
    		GPIO1_A0_d/FLEXBUS1_D0
    DSMC_CLKP/VO_LCDC_DEN    		32
    12-PIN Header
    PinAssignmentDescriptionPinAssignmentDescription
    1RS485_ARS485 Differential Signal (+)2RS485_BRS485 Differential Signal (-)
    3CAN_LCAN Bus Differential Signal (Low)4CAN_HCAN Bus Differential Signal (High)
    5GNDSystem Ground6VBAT_RTCRTC Real-time Clock Battery Input
    7MICIN_PMicrophone Input (+) (Differential)8MICIN_NMicrophone Input (-) (Differential)
    9MICIN_PMicrophone Input (+) (Alternate Channel)10MICIN_NMicrophone Input (-) (Alternate Channel)
    11SPK_PSpeaker Output (+) (Differential)12SPK_NSpeaker Output (-) (Differential)

    Development Resources​

    SDK Source Code​

    📚

    Source Code

    Linux for ARM Development Boards

    Official Images​

    The ArmSoM team uses Buildroot as the foundation for the official Forge1 operating system. How to flash the system image?📤

    The following systems have been tested and validated by ArmSoM:

    Cloud Drive Address:

    Google Drive link
    logoDescriptionDownload
    buildrootbuildroot for Forge1:
    Linux Kernel 6.1, support RT-Thread 4.1,
    support bare metal programs, support multi-core heterogeneous AMP,
    Preempt-RT/Xenomai real-time patches,
    lightweight UI framework LVGL.    		Google Drive link

    Hardware Resources​

    Get CM1 Schematics, DXF files, and other hardware resources.

    Baidu Netdisk Link
    📄

    CM1 SCH

    📃

    CM1 2D Drawing

    📜

    CM1 Reference Designator Map

    Product Certifications​

    CE / FCC / RoHS​

    Product Longevity Statement​

    ArmSoM-CM1 will be produced until at least July 2035.

    Accessories​

    Our official accessories designed for the ArmSoM-CM1 Kit aim to help you achieve the best performance from your computer.

    Card Image

    Display-7-hd

    A 7-inch touchscreen display suitable for interactive projects like entertainment systems and information dashboards.

    Purchase Samples​

    ArmSoM Independent Site:

    ArmSoM AliExpress Official Store:

    ArmSoM Taobao Official Store:

    For OEM&ODM, please contact: sales@armsom.org

    Expert Perspective​

    Important Notes​

    [Electrostatic Discharge (ESD) Protection]
    1. Always wear an anti-static wrist strap or take ESD precautions before handling the device to prevent damage.
    2. Assembly should be performed in an ESD-controlled environment. Avoid operation under dry and low-humidity conditions.
    3. When not in use, store the device in an anti-static bag in a temperature-controlled, low-humidity environment.
    4. Avoid friction or collision when handling the device to prevent generating static electricity.
    5. Handle the device by its edges, avoiding direct contact with chips on the motherboard.
    6. Do not plug or unplug cables or other devices while the system is powered on to avoid damage from current surges.
    7. Before plugging/unplugging expansion GPIO/MIPI interfaces, power down the device and disconnect the power cable.
    [Thermal Management]

    Without effective cooling measures, the surface temperature of the main SoC can exceed 60°C. Avoid direct contact with the SoC and surrounding power inductors to prevent burns. Ensure adequate ventilation around the device during operation. Do not place the SBC in direct sunlight. It is recommended to use the official Cooling Fan & Heatsink Kit or DIY Case, or suitable third-party cooling solutions to ensure optimal thermal performance.