SUMIT
Encyclopedia
SUMIT is an acronym, pronounced "Sum it", which stands for Stackable Unified Module Interconnect Technology, and refers to a specification of the connector used to enable communication 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.
Signals carried within the SUMIT Connectors
Two identical connectors are used to carry the signals as specified by the SUMIT standard. Commonly referred to as SUMIT A & SUMIT B; designers have the option of designing with either both SUMIT A&B, or just SUMIT A. The signals carried within each connector is as follows:
SUMIT A:
SUMIT B:
Applications of SUMIT
As of August 2009, there are three board form factors which uses the SUMIT connectors for embedded applictions.
Signals carried within the SUMIT Connectors
Two identical connectors are used to carry the signals as specified by the SUMIT standard. Commonly referred to as SUMIT A & SUMIT B; designers have the option of designing with either both SUMIT A&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/I2C Bus
SUMIT B:
- One PCI-Express x1 lane
- One PCI-Express x4 or four more PCI-Express x1 lanes
Applications of SUMIT
As of August 2009, there are three board form factors which uses the SUMIT connectors for embedded applictions.
- ISM or SUMIT-ISM [90mm × 96mm]
- Pico-ITXe [72mm × 100mm]
- Pico-I/O [60mm × 72mm]