The HH-SCDAYU800A is another RISC-V development board built around the Alibaba T-Head TH1520 system-on-chip. With its dual Gigabit Ethernet ports, multiple camera interfaces, and industrial-grade design, the board targets applications requiring multimedia features, edge inference, and smart device integration.

This board is implemented by RunKaiHong Digital Tech, a company based in Nanjing, China, though little public information is available about them. It uses the TH1520 SoC, following earlier implementations such as the LM4A module by Sipeed, the Meles SBC from Milk-V, and the BeagleV-Ahead from BeagleBoard.org.

While the Xuantie C910 core is designed to support clock speeds up to 2.5 GHz, this board appears to run the cores at 1.85 GHz.

Th1520 Block Diagram
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The board integrates a neural processing unit (NPU) capable of 4TOPS at INT8 precision, supporting local inference tasks such as object detection and signal classification. The included GPU supports OpenGLES 3.2, Vulkan 1.2, and OpenCL 2.0. Multimedia capabilities include 4K video decoding at up to 75 frames per second and encoding at 40 frames per second using H.265 and H.264.

Output options include HDMI 2.0 and a 4-lane MIPI DSI interface. Hardware JPEG decoding and encoding are also supported.

HH-SCDAYU800A Peripherals
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Networking features include two Gigabit Ethernet ports for wired connections. Wireless support is provided by an onboard module offering 802.11b/g/n Wi-Fi and Bluetooth 5.0. The board includes USB 3.0 and USB 2.0 host ports, a USB Type-C device port for firmware download, and headers for UART, I2C, SPI, and GPIO.

Additional connectivity includes RS232, RS485, a SIM slot for 4G modules, and a touch panel connector.

HH-SCDAYU800A
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Technical documentation appears to be very limited, as the first link lacks examples and the second provides instructions only in Chinese for a different board. On the software side, the product page states that the HH-SCDAYU800A runs OpenHarmony 4.1 and supports inference models from the DeepSeek framework for edge AI tasks.

Specifications for the HH-SCDAYU800A:

• Memory / Storage:
  • 4GB LPDDR4
  • eMMC storage
  • 1× MicroSD card slot
• Display:
  • 1× HDMI 2.0 (up to 4K @ 60fps)
  • 1× 4-lane MIPI DSI (up to 4K @ 50fps)
  • 1× Touch panel connector (likely I2C-based, for use with DSI)
• Camera:
  • 2× 2-lane MIPI CSI
  • 1× 4-lane MIPI CSI
• Audio:
  • 3.5mm headphone jack
  • 1× speaker output (SPK connector)
  • 2× microphone input
• Connectivity:
  • 2× Gigabit Ethernet ports (RJ45)
  • Wi-Fi 802.11b/g/n
  • Bluetooth 5.0
  • 1× SIM slot (for optional 4G modem module)
• I/O Interfaces:
  • 3× UART, 1× I2C, 1× SPI
  • 2× RS232, 1× RS485
• USB:
  • 2× USB 3.0 Type-A
  • 2× USB 2.0 Host (via HX1.25-4P header)
  • 1× USB 2.0 Type-C (device mode, for firmware download)
• Other Features:
  • Power, Reset and User button
  • 2x Status LED
  • 1× Fan connector (with fan mounted on SoM)
• Power:
  • 12V DC input @ 2A (barrel jack)
• Operating Temperature:
  • -20°C to 60°C
• Dimensions:
  • 159.99 mm × 123.0 mm

Further Information

Compared to other TH1520-based boards mentioned earlier, the HH-SCDAYU800A is priced higher. It is listed on the Youyeetoo website starting at $390.47 for the 4GB RAM + 8GB eMMC configuration, and $557.87 for a 16GB RAM + 128GB eMMC variant.