SECO SBC-3.5-RK3568 - A Rockchip RK3568 3.5-inch SBC with dual gigabit Ethernet

SECO SBC-3.5-RK3568 is a feature-rich 3.5-inch SBC powered by a Rockchip RK3568 quad-core Cortex-A55 AI SoC which includes up to 4GB DDR4-3200 memory, 64GB eMMC 5.1 flash, three display interfaces (HDMI, LVDS, eDP), dual gigabit Ethernet, and various expansion headers for industrial applications.

Additionally, it also features, Wi-Fi 802.11 a/b/g/n/ac, Bluetooth 5.0, and LTE support via M.2. USB connectivity includes two USB 3.0 Type-A, and multiple USB 2.0 ports with OTG, alongside RS-232, RS-422, RS-485, and TTL UART ports and more.

Previously we have written about similar SBCs powered by the Rockchip RK3568 SoC like the AAEON RICO-3568, the RK3568 Tinker Board 3N, the Radxa ROCK 3B and many others feel free to check those out if you are interested in the topic.

SECO SBC-3.5-RK3568 Specifications:

SoC – Rockchip RK3568
- CPU – Quad-core Cortex A55 processor at up to 2.0 GHz
- GPU – Mali G52 GPU with support for OpenGL ES 1.1/2.0/3.2, OpenCL 2.0, Vulkan 1.1
- VPU
  - 4Kp60 H.264, H.265, VP9, 1080p60 MPEG-4/-2/-1, VP8, and VC1 video decoder
  - 1080p60 H.264/H.265 video encoder
- AI accelerator – 0.8 TOPS NPU
System Memory – Soldered-down DDR4-3200, up to 4GB
Storage
- eMMC 5.1 drive soldered on-board, up to 64GB (first boot device)
- microSD slot (second boot device)
- I2C flash
- QSPI flash (factory option)
Display interfaces
- HDMI 2.0, up to 4K x 2K @ 60Hz
- eDP 1.3, up to 4096 x 2160 @ 60Hz
- LVDS single/dual channel interface
- Dedicated connector for I2C touchscreen controller
- Supports 3 independent video outputs
Camera – 2x 2-lane MIPI-CSI camera connectors or 1x 4-lane
Audio
- TRRS combo audio jack (stereo mic in, stereo line out)
- Mono speaker out (amplified 1.3Watt @ 8Ohm) on internal header
- 1x PDM signal ports on the internal header
Networking
- 2x Gigabit Ethernet ports (TI DP83867 Ethernet PHY on RGMII interface)
- Optional onboard M.2 1216 module WLAN 802.11 a/b/g/n/ac + BT 5.0
- M.2 Socket 2 Key B for LTE module + microSIM card slot onboard
USB
- 2x USB 3.0 Type-A
- 1x USB 2.0 Type-A
- 1x USB 2.0 OTG micro-AB (muxed with one USB 3.0 for Deep Recovery)
- 1x USB 2.0 internal pin header
- 1x USB 2.0 internal pin header (dedicated to touch screen)
Serial Ports
- 2x 4-wire RS-232/RS-422/RS-485 (multistandard transceivers) on the internal header
- 2x 2-wire TTL UART ports on the internal header
Debugging – 1x debug UART, 1x JTAG port
Expansion
- M.2 Socket 2 Key M for AI accelerator modules
- 8x GPIOs or 4x GPIOs + 4 ADC (factory configuration alternatives)
- 2x CAN, 1x I2C, 1x SPI
Misc – RTC battery
Power Supply – +12VDC to +24VDC range
Operating Temperature – 0°C to +60°C (Commercial version)
Dimensions – 146 x 102 mm (3.5” form factor)

Starting from Linux Kernel version 5.10, this board’s support package is fully integrated into Edgehog OS. Developed by SECO for their All-In-One IIoT platform CLEA, Edgehog OS is based on Yocto and prioritizes security and stability. It features OTA updates, double partitions, and fallback procedures for enhanced reliability. Additionally, it includes a Device Manager for cloud communication and enables fleet management for a product family. More information about this SBC can be found on SECO’s wiki page.

SECO has not yet released pricing information for the SBC-3.5-RK3568 3.5-inch SBC, but you can find additional details on their products page.

Debashis Das

Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication