Stackable Unified Module Interconnect Technology (SUMIT) is a connector between expansion buses independent of motherboard form factor. Boards featuring SUMIT connectors are usually used in "stacks" where one board sits on top of another.
It was published by the
Small Form Factor Special Interest Group
The Small Form Factor Special Interest Group (SFF-SIG, pronounced ''ess-eff-eff-sig'') is an international non-profit standards body focused on modular computer hardware technologies used in embedded and small form factor computers and controller ...
.
Details
Two identical connectors carry the signals specified by the standard. Commonly referred to as SUMIT A & SUMIT B, designers have the option of designing with either both SUMIT A and B, or just SUMIT A. The signals carried within each connector is as follows:
''SUMIT A:''
* One PCI-Express x1 lane
* Four USB 2.0
* ExpressCard
* LPC
* SPI/uWire
* SMBus/I
2C Bus
''SUMIT B:''
* One PCI-Express x1 lane
* One PCI-Express x4 or four more PCI-Express x1 lanes
As of August 2009, three board form factors used the SUMIT connectors for embedded applications: ISM or SUMIT-ISM
0mm × 96mm Pico-ITXe
2mm × 100mm and Pico-I/O
0mm × 72mm
See also
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VMEbus
VMEbus (Versa Module Europa or Versa Module Eurocard bus) is a computer bus standard, originally developed for the Motorola 68000 line of CPUs, but later widely used for many applications and standardized by the IEC as ANSI/IEEE 1014-1987. I ...
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VPX
VPX (Virtual Path Cross-Connect), also known as VITA 46, refers to a set of standards for connecting components of a computer (known as a computer bus), commonly used by defense contractors.
Some are ANSI standards such as ANSI/VITA 46.0–2019.
...
*
CompactPCI
CompactPCI is a computer bus interconnect for industrial computers, combining a Eurocard-type connector and PCI signaling and protocols. Boards are standardized to 3 U or 6U sizes, and are typically interconnected via a passive backplane. The co ...
*
PC/104
PC/104 (or PC104) is a family of embedded computer standardization, standards which define both Computer form factor, form factors and Bus (computing), computer buses by the PC/104 Consortium. Its name derives from the 104 pins on the interboard ...
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Pico-ITXe Pico-ITXe is a PC Pico-ITX motherboard specification created by VIA Technologies and SFF-SIG. It was announced by VIA Technologies on October 29, 2008 and released in December 2008. The Pico-ITXe specifications call for the board to be , which is ha ...
References
External links
Small Form Factor Special Interest GroupSUMIT Specifications version 1.5Samtec SUMIT connector page
Motherboard form factors
Computer buses
Embedded systems
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