What is SMARC?
The recent revision 2.1.1 of the SMARC® module standard (Smart Mobility ARChitecture) has become the best and most future-proof standard for small form-factor embedded modules. With 314 pins available on its inexpensive and robust MXM3 connector, SMARC® has ample space for proven and popular interfaces. In the new standard revision, PCIe now features 4 lanes instead of 3, USB now covers up to 2x USB 3.0 and up to 6x USB 2.0 interfaces, LVDS now supports two independent dualchannel connections which alternatively can be used for embedded DisplayPort (eDP) or for DSI, two Gigabit Ethernet ports are now supported, Audio has independent HDA and I2S ports and up to 4 UARTs are available.
In addition to SPI, also eSPI is supported for attachment of peripheral devices on the baseboard or the application hardware. And still there are a lot of reserved pins left for future upgrades. Never before has it been so easy and natural to use Arm®-based and x86-based computer modules on a modern and up-to-date module standard.
SMARC® 2.0/2.1.1 Properties
The SMARC® 2.0/2.1.1 Standard uses the inexpensive MXM-3 connector which provides 314 pin connections. The connector is robust and proven, and there are versions available which are certified for automotive use. The edge contacts enable a low-resistance high-speed contact which is usable even for advanced signal speed up to Gigabit Ethernet, PCI-Express and SATA. The Standard defines two Module sizes: 82mm x 50mm (short size) and 82mm x 80mm (full size).