Rockchip RK3588 CPU module exposes more I/Os through four board-to-board connectors

We’ve already seen several Rockchip RK3588 modules with Firefly Core-3588J, Turing RK1, and Banana Pi RK3588_CV1, all with an edge connector to insertion into the carrier board. Rongpin RD-RK3588 system-on-module is a little different with four board-to-board connectors that enable a slightly more compact design, and should expose more I/Os than say a 314-pin MXM edge connector.

The module ships with up to 16GB of RAM, 128 GB of storage, a Rockchip RK806-1 PMIC, and the company also offers a development kit with RD-RK3588-B baseboard fitted with the module for evaluation and early software development.

RD-RK3588 board-to-board module

RD-RK3588-C module

RD-RK3588-C core module specifications:

  • SoC – Rockchip RK3588 octa-core processor with 4x Arm Cortex-A76 cores @ up to 2.4 GHz, 4x Arm Cortex-A55 cores, Arm Mali-G610 MP4 GPU with support for OpenGL ES3.2, OpenCL 2.2, Vulkan1.1, 6 TOPS NPU, 48MP ISP, 8Kp60 video decoding, 8Kp30 video encoding
  • System Memory – 4GB, 8GB, or 16GB LPDDR4x
  • Storage – 32GB, 64GB, or 128GB eMMC 5.1 flash
  • Carrier board interface – 4x high-density board-to-board connectors (CNXSoft: I’m guessing 80-pin or 100-pin each, the photos are not clear enough)
    • Storage – Up to 3x SATA 3.0, 1x SD card
    • SDIO – 1x SDIO for WiFI, 1x SDIO for SD card
    • Display I/F
      • 2x HDMI output up to 4Kp60 (CNXSoft: Not sure why not 8Kp60)
      • 2-ch 4-lane eDP up to 1080p60
      • DisplayPort up to 4K
      • 2-lane MIPI DSI supports up to 2K
    • Camera – 6x MIPI CAMERA CSI inputs
    • Audio – 3x I2S (2x 8-channel, 1x 2-channel)
    • Networking – 2x Gigabit Ethernet
    • USB
      • 3x USB 2.0, including one OTG
      • 2x USB 3.0 shared with DP
    • PCIe – 1x PCIe 3.0 x4, 3x PCIe 2.0 x1
    • Serial – 10x UART, 2x CAN bus
    • Low-speed I/Os – 5x SPI, 7x I2C, 15x PWM
    • ADC – 4x ADC inputs
    • GPIO – Up to 120x GPIOs
  • PMIC – Rockchip RK806-1
  • Power Supply – 3.4 to 5.5V (5A+ recommended)
  • Dimensions – 60 x 50 x 4.2mm
  • Temperature Range – -10°C to +60°C
  • Life (MTBF?) – “Continuous operating life is more than 5 years”

The company lists Android 12, Ubuntu 18.04, Linux 5.10 + QT 5.15, and Debian11 operating systems for the module, but I was unable to find any public documentation and download links.

RD-RK3588 development board

RD-RK3588 development boardSpecifications:

  • Supported SoM – RD-RK3588-C described previously, and shown with heatsink and fan in the photo above
  • Storage – MicroSD card socket
  • Video Outputs
    • 2x HDMI outputs up to 4K (multiplexed with eDP)
    • 2-channel eDP connector (multiplex with HDMI)
    • Dual-channel LVDS up to 1920×180
    • 1x 2-lane MIPI DSI connector
  • Video Inputs
    • 1x HDMI input up to 1080p60
    • 6-channel MIPI CSI camera input
  • Audio – 3.5mm headphone/speaker jack, 3.5mm Line-In jack, header for dual speaker (3W/8 Ohms)
  • Networking
    • 2x Gigabit Ethernet RJ45 ports
    • Wi-Fi 6 and Bluetooth 5.0 via Ampak AP6275 module
    • Support for 5G modules (Quectel and Zhanrui) with two SIM card slots on the baseboard (at the back).
  • USB
    • 1x USB 3.0 port
    • 5x USB 2.0 Type-A host ports, 1x USB Type-C port, 2x USB 2.0 interfaces on header
  • Serial – 4x serial ports via headers, 2x CAN bus via headers, 1x RS485
  • I/O headers – 1x I2C,  4x GPIO
  • Expansion – PCIe 3.0 x4 socket
  • Misc – RTC + battery
  • Power Supply – 12V/2A via DC jack
  • Dimensions – 155 x 107 mm

Full-featured RK3588 development boardSomehow, they did not think SATA connectors would be a nice thing to have. Again, there’s no documentation whatsoever, so you’d have to contact the company for details.

The RD-RK3588 CPU module and development board are sold on Aliexpress for respectively $235.57 and $349.78 with 4GB RAM and 32GB eMMC flash. Scrolling down on the Aliexpress page, we can also see some accessories with RM500Q 5G modem, and a range of 5-inch to 15.6-inch displays.

Thanks to theguyuk for the tip.

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