SBC Standards

1
SBC Standards

• http//en.wikipedia.org/wiki/Single-board_computer
  (see pictures)
• Backplane SBCs are the most common type in use.
  They employ various architectures, such as
  CompactPCI, PXI, VMEbus, VXI, and PICMG.
  Different from a conventional motherboard the I/O
  interfacing technology (ISA, PCI, PCIX, etc) is
  associated with the backplane slots, usually 20
  or less. Such a configuration allows for
  installation in a 19" rack mount enclosure.
• Some SBCs are stackable, such as PC/104,
  PC/104-Plus, PCI-104, EPIC, and EBX. Stackable
  systems interface to supporting modules (e.g.
  solid-state hard drive) via headers and employ
  SIMM and DIMM memory technology.

2
PC/104 Standard

• http//en.wikipedia.org/wiki/PC/104 (see
  pictures)
• Form factor 3.55 3.775 inches (90.17
  95.89 mm). The height of the SBC is determined by
  the connector size.
• The typical PC/04 stack includes a motherboard,
  ADC, and GPIO. Newer peripheral technologies are
  being deplyed 802.11 controllers, USB, and GPS
  receivers.

3
Form Factors Stacks

• PC/104
• so called because of its 104-pin header, which
  includes all of the ISA lines and additional
  ground pins. With the exception of current
  requirements all other aspects match ISA.
• PC/104-Plus
• Same as the PC/104 with the addition of the PCI
  bus. Due to on-baoard ISA and PCI connectors
  board real-estate is a concern.
• PCI-104
• Only nicludes the PCI connector and interface
  technology
• EBX
• EBX (Embedded Board eXpandable) supports ISA,
  PCI, and PCMCIA with a form-factor of 5.75 x
  8.00
• EPIC
• An SBC basedon the PC/104 with a form-factor of
  4.53x6.50
• A stack is comprised of modules, such as
  PC/104, PC/104-Plus, or PCI-104 in various
  combinations.
• The stack must contain at least one motherboard,
  which acts as the main controller for various
  peripherals.
• PC/104 Embedded Consortium http//www.pc104.org/

4
Embedded System Operating Systems
http//www.embedded.com/columns/surveys/163700590?
_requestid40214 (See Commercial Vendor Survey)