System on module

System On Module (SoM) is an extension of the concept of System on Chip (SoC), and lies between a full-up computer and a microcontroller in nature. A SoM solution offers a dense package computer system for use in small or specialized applications requiring low power consumption or small physical size.

A number of manufacturers are now beginning to introduce products which are defined as System on Module. Among thoes are Advanced Knowledge Associates (www.a-k-a.net) in Santa Clara, CA; BCM Advanced Research (www.bcmcom.com) in Irvine, CA; Embedded Systems (www.embedded-systems.net), and others.

In reviewing SoM specifications and capabilities via a quick Google search, it appears that the definition of a System on Module appears to be somewhat varied. It varies from being defined as a full-up PC in miniture form to being something of a super strength microcontroller.

One of the things that is common though, is the idea of SoMs' being used to serve specialty applications, and often having vehicle or automation control applications via the inclusion of a CAN bus. Also, in reviewing offerings from Advanced Knowledge, it appears that their solution also supports the Mil-Std 1553 bus used in military vehicles and aircraft.

My knowledge of the subject is in no way exhaustive, and I hope that others will be able to contribute further to this article which I created after failing to find any information on SoM in the existing Wikipedia.