Avalue ECM-EHL 3.5" SBCs with Intel Elkhart Lake, Triple 4K Display and Wide-Range DC Input

A compact embedded design often has to drive more than one screen, talk to older serial equipment and run from whatever DC supply the cabinet already has, all from a board small enough to fit behind a panel. The Avalue ECM-EHL series answers that brief with a 3.5 inch SBC, also called a 3.5 inch motherboard, measuring 146 x 101 mm, with the Elkhart Lake processor soldered on the bottom layer.

Every ECM-EHL shares the same board. One 260-pin SO-DIMM socket takes up to 32 GB of non-ECC DDR4-3200. Intel UHD Graphics drive HDMI 2.0b, DisplayPort 1.4a and eDP 1.3, each up to 4096 x 2160 at 60 Hz, for up to three displays at once. I/O covers one 2.5GbE and one Gigabit Ethernet port on Intel I225 and I210 controllers, two USB 3.1 Gen2 and four USB 2.0 ports, one RS-232/422/485 and three RS-232 ports, 8-bit GPIO and a 92HD73C audio codec. An M.2 B key with a SIM slot takes an SSD or an LTE card, an M.2 E key adds a PCIe x1 and USB 2.0 module, and a SATA III port takes a drive. TPM 2.0 and a hardware watchdog are on board, and hardware monitoring tracks CPU and system temperature and voltages.

The series differs only in processor. The ECM-EHL-J6412-A1R carries a Celeron J6412 at up to 2.6 GHz, the ECM-EHL-J6413-A1R a Celeron J6413 at up to 3.0 GHz, the ECM-EHL-X13E-A1R an Atom x6413E at up to 3.0 GHz and the ECM-EHL-X25RE-A1R an Atom x6425RE at up to 1.9 GHz. All four have 1.5 MB cache and come from the Elkhart Lake family rated at 4.5 to 12 W.

Power is 9 to 36 V DC with AT and ATX modes, AT by default, so the boards run from 12 V or 24 V supplies. The datasheet lists a standard version for 0 to 60 °C and an extended version for -40 to 85 °C, both with 0.5 m/s airflow, so confirm which version your build needs when ordering. Operating humidity is up to 95% at 40 °C, non-condensing. The AMI BIOS sits on 256 Mbit SPI flash, and ACPI 5.0 power states S0, S3, S4 and S5 are supported. Each board weighs 0.2 kg, supports Windows 10 and Linux, and carries CE and FCC Class B marks.