The M.2 memory and peripheral expansion form factor is very popular in PC motherboards and mobile devices like laptops where compact storage is a requirement. It is also starting to show up in embedded motherboards and modules like Diamond Systems’ Xeta COM Express Type 10 SBC family. The Xeta 84-mm by 55-mm stack actually has a heat spreader on the bottom with the COM Express module in the middle. The white connector on the top carrier board provides a stackable expansion, such as Diamond Systems’ expansion board with the M.2 and Mini-PCIe sockets.
The Xeta COM Express supports up to 8 Gbytes of RAM and a 1.1 GHz, quad core, Intel Apollo Lake N4200 processor. The fanless design has a -40 to +85°C operating temperature range. The main carrier board includes a 16-channel, 16-bit ADC and a four-channel, 16-bit DAC in addition to connectors for dual gigabit Ethernet, GPIO, four serial ports, an SD card socket, and a Mini-PCIe socket.