3.5-inch i.MX8M SBC focuses on A/V
Mar 18, 2019 — by Eric Brown 601 viewsSeco’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.
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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 [email protected] 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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