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Mini COM Express module runs Linux on the Bay Trail

Mar 17, 2014 — by Eric Brown 1,141 views

Congatec’s 84 x 55mm COM Express board uses an Atom E3800 SoC, and offers multiple display, SATA, GbE, and USB ports, PCIe expansion, and optional 64GB SSD.

The “Conga-MA3” computer-on-module supports the tiny (84 x 55mm) COM Express Mini Type 10 form-factor, which uses a single 220 pin A-B connector. In October, Congatec announced a 95 x 95mm COM Express Type 6 Compact module featuring the same Intel Atom E3800 SoC called the Conga-TCA3, as well as an E3800-based, Qseven style Conga-QA3 computer-on-module. Other E3800-based COM Express Mini Type 10 modules include the Kontron COMe-mBT10.

(click image to enlarge)

The Conga-MA3 COM comes with a choice of four Intel Atom E3800 SoCs ranging from the single-core, 1.46GHz Intel Atom E3815 with a 5 Watt TDP, up to the quad-core, 1.91GHz Atom E3845 which draws up to 10 Watts. The module’s datasheet, but not its product page and announcement, also lists the dual-core E3826 (1.46GHz, 7W TDP) and E3825 (1.33GHz, 6W TDP).

The Conga-MA3 also supports the recently launched, Bay Trail-I based Intel Celeron N2930, a quad-core 1.83GHz SoC with 2MB cache and a 7.5W TDP (4.5W Scenario Design Power). The N2930 is very similar to the earlier Celeron N2920, featuring 22nm fabrication, and very similar clock rates (1.83GHz) and graphics frequencies (313/854MHz), However, it adds Intel Secure Key and Intel Quick Sync Video technologies and supports 1333MHz DDR3 RAM instead of 1066MHz. According to CPU-World, the Celeron N2930 also uses a new core stepping that fixes a number of USB defects.


The Linux-ready Conga-MA3 offers up to 8GB soldered DDR3 RAM and an optional onboard eMMC flash disk of up to 64GB with “an integrated wear levelling feature for high data security,” according to Congatec. The module offers an LVDS interface, and a choice of either DisplayPort 1.1 or a HDMI 1.4a/DVI TMDS interface. Dual display support is available.

Conga-MA3 block diagram
(click image to enlarge)

The Conga-MA3 provides a gigabit Ethernet controller, and expresses interfaces including a single USB 3.0 port, seven USB 2.0 ports, dual SATA 2.0, SDIO, and serial and HD audio I/O. Four PCIe x1 lanes are provided for expansion. An industrial temperature option is provided along with the commercial version.

Specifications listed for the Conga-MA3 include:

  • Processor — Intel Atom E3800 (Bay Trail-I), 5-10W TDP, Intel HD Graphics:
    • E3845 (4x cores @ 1.91GHz), 2MB L2, 10W TDP
    • E3827 (2x cores @ 1.75GHz), 1MB L2, 8W TDP
    • E3815 (1x cores @ 1.46GHz), 512KB L2, 5W TDP
    • Celeron N2930 (4x cores @ 1.83GHz, 2MB L2, 7.5W TDP
  • Memory/storage:
    • Up to 8GB soldered-on DDR3L-1333
    • Up to 64GB of MLC NAND or up to 4GB of SLC NAND (both eMMC 4.51)
    • SDIO interface
    • 2x SATA 2.0 3Gbps interfaces
  • Display:
    • DisplayPort 1.1 or a HDMI 1.4a/DVI TMDS interface
    • Single-channel 18/24-bit LVDS 18 at up to 1920 x 1200 @ 60Hz
    • Dual display support
  • Networking — Gigabit Ethernet interface (Intel I210)
  • Other I/O:
    • USB 3.0
    • 7x USB 2.0
    • LPC, SPI, I2C (fast mode 400KHz, multi-master)
    • HD audio
  • PCI Express expansion — 4x PCIe 2.0 x1 lanes (5Gbps)
  • Other features — Watchdog; ACPI 5.0 with battery support
  • Operating temperature — 0 to 60°C (commercial) or -40 to 85°C (industrial)
  • Dimensions — 84 x 55mm (COM Express Mini Type 10)
  • Operating system — Linux; Windows 7/8/7 Embedded Compact/WES7/WES8

Further information

No pricing or availability info was provided for the Conga-MA3. More information may be found at Congatec’s Conga-MA3 product page.

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