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3.5-inch i.MX8M SBC focuses on A/V

Mar 18, 2019 — by Eric Brown 611 views

Seco’s 3.5-inch “SBC-C20” runs Linux on a dual- or quad-core -A53 i.MX8M SoC with up to 2GB RAM and 16GB eMMC plus 4K-ready eDP or HDMI 2.0, M.2 expansion, and optional -40 to 85°C.

The SBC-C20 is the third and final SBC announced by Seco at Embedded World. It’s not as fast as the i.MX8 QuadMax based SBC-C43 and not quite as customizable as the i.MX8M Mini powered SBC-C61, but considering the widespread availability of the well-traveled i.MX8M, it’s likely to ship sooner than its siblings. The media-rich, 3.5-inch SBC targets “cost-effective solutions in the multimedia field as well as for IIoT applications.”

SBC-C20, front and back
(click images to enlarge)

Other i.MX8M based SBCs include Boundary Devices’ Nitrogen8M, Arrow’s 96Boards CE Extended Thor96, SolidRun’s HummingBoard Pulse, and the armStone MX8M from F&S. There are also sandwich-style carrier boards sold as SBCs such as CompuLab’s SBC-iMX8 Evaluation Kit and Variscite’s VAR-DT8MCustomBoard SBC.

The SBC-C20 runs Yocto Linux, Wind River Linux, and Android on Dual, QuadLite (no VPU), and Quad i.MX8M models of NXP’s up to 1.5GHz Cortex-A53 SoC. The SoC integrates a Cortex-M4F real-time core and a 4K-ready Vivante GC7000Lite/GC7000VLX GPU.


Up to 2GB of soldered DDR3L is available along with an option for up to 16GB eMMC. Options include an LVDS interface and the ability to swap the standard eDP connector for a similarly 4K ready HDMI 2.0a port. Other options include WiFi with Bluetooth LE 4.2, a 10W amp, a USB 2.0 touch controller, and -40 to 85°C support.

SBC-C20 block diagram
(click image to enlarge)

The SBC-C20 is equipped with GbE, CAN, and serial ports, as well as 3x USB host ports, including a 3.0 model. Other features include MIPI-CSI, a microSD slot, and an M.2 slot with micro-SIM slot for cellular modems. There’s a variety of analog and digital audio features, an RTC, GPIO, and other internal I/O.

Specifications listed for the SBC-C20 include:

  • Processor — NXP i.MX8M Dual, QuadLite, or Quad (2x or 4x Cortex-A53 @ up to 1.5GHz); Vivante GC7000Lite GPU; VPU on all but QuadLite; Cortex-M4F @ 266MHz
  • Memory/storage:
    • Up to 2GB DDR3L RAM
    • Optional up to 16GB eMMC
    • MicroSD slot
  • Networking/wireless:
    • 10/100/1000 Ethernet port
    • Optional WiFi and Bluetooth 4.2 LE
    • Optional U.FL ant. connectors
    • M.2 Socket 2260/3042 Key-B slot for WWAN modules
    • Micro-SIM slot
  • Media I/O:
    • eDP port or HDMI 2.0a port for up to 4k@60 with HDR
    • Optional LVDS for up to 1080p60 with I2C touch support
    • MIPI-CSI (4-lane)
    • I2S Audio Codec
    • Line-out, mic-in via combo TRRS audio jack
    • Speaker, mic, and earphone headers
    • Optional 10W amp
  • Other I/O:
    • USB 3.0 host port (or USB 2.0 touch controller)
    • Micro-USB 2.0 OTG port (recovery only)
    • 2x USB 2.0 host ports
    • RS-232 port
    • CAN port
    • Debug UART header
    • SPI and I2C connectors
    • 8x GPIO
  • Other features — RTC with battery
  • Power — 12V DC input
  • Operating temperature — 0 to 60°C; optional -40 to 85°C
  • Dimensions — 147 x 101.6mm (3.5-inch)
  • Operating system — Yocto, Wind River Linux, Android; BSP with wiki

Further information

No pricing or availability information was provided for the SBC-C20. More information may be found on Seco’s SBC-C20 product page and i.MX8M wiki and BSP.


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