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PCI/104-Express is the newest variation of the standard. PCI/104-Express combines a connector for a PCI interface and a connector for the PCI-Express [PCIe] interface. Similar to the introduction of the PCI/104 interface in many other board formats, PCI/104 now uses the PCI Express [PCIe] electrical interface.
STOP; THIS IS A COPY OF THE PCI-104 PAGE
The PCI bus connector is a 4x30, 2mm stack-through connector. PCI-104
cards may still reside in a stack with either PC/104 cards or PC/104-Plus
cards. However when PCI-104 boards are combined in a stack with other
type boards they must reside on the top of the stack [because they do not
have the XT or AT connectors]. If PC/104-Plus cards are used they must
reside underneath the PCI-104 cards. PCI-104 boards may only be stacked 4
cards high. This PCI bus operates at 33MHz, 66MHz PCI operations are not
supported.
The elimination of the J1 and J2 connectors allows for
additional board space for other components. Component height above and
below the board has changed to 0.345" on the component side and 0.190" on
the bottom side. PCI-104 boards may operate as 3.3 volt only, 5 volt only
or Universal boards. The PCI-104 specification defines the mechanical
foot print and card power requirements.
This is a stacked bus with no backplane or interconnecting cable. The
cards plug into each other.
The older standard PC/104 bus uses the PC/XT, and PCAT card specification (IEEE P996).
PC/104-Plus allows the addition of the PCI bus onto the card. The PC/104-Plus adds
another connector to accommodate the PCI signals.
In other words a PC104 card is just like the [old] Personal Computer
PC-XT interface card, or PC-AT interface card, and the PC104-Plus board
is just like an older mother board with ISA slots and PCI slots. This
standard is widely used for embedded computing application even though
the PC ISA bus has been obsolete for years now. This PCI bus operates at
33MHz, 66MHz PCI operations are not supported.
The card size for each of the PC/104 standards is shown below.
Card [dimensions] size / Form Factor
Boards may be stacked 6 high when using the PC-AT [PC/104] bus, but only four of the boards may use the PCI bus.
PCI-104 Pinouts
Pin out signal name table for the PCI-104 interface bus.
The PC/104-Plus [which adds the PCI bus], and PCI-104 timing is derived from the PCI specification
The PCI-104 bus and the PC/104-Plus addition to PC104 use normal CMOS devices for the PCI Bus interface.
Integrated Circuit manufacturers listed on this site:
Memory Chip Manufacturers
Processor Manufacturers
Chip Set Manufacturers
Glue Logic Manufacturers
PCI-104 Specification [Version 1.0, 2003]
PC/104 Specifications {VersaLogic Corp.}
PC/104 and PC/104-Plus Specifications {PC104.org}
PC/104 Spec ver 2.5, PC-104-Plus Ver2.0, PCI-104 V1.0 {PC/104 Consortium}
The PCI side of the card for PC/104-Plus boards or PCI-104 boards use a 4
x 30 (120-pin) 2mm pitch stack-through connectors or non-stack-through
connectors.
While the older PC104 bus has .100" spacing, and may be
'stack-through' (pins extend out the other side of the PWB), or
'non-stack-through (normal PWB mounting). The PC/104 8 bit XT card uses a
62 pin connector, and the 16 bit AT version adds another 40 connector. PC
XT/AT connectors are not part of the PCI104 specification.
Comm Con Connectors Inc.
{PC/104 Connector Manufacturer}
ept
{PC104 Connectors-PC104 Plus Connector Manufacturer}
Teka Interconnection Systems
{Solder Flux Bearing Lead Connectors}
Tyco Electronics
{PC/104 Connector Manufacturer}
{Back to PCI/104-Express Bus Index}
Design Key words: PCI/104-Express, PC104, PC-104, PC/104-Plus, PCI-104, PCI104, PC/104 bus, CCA Board Dimensions, P2/J2, P1/J1, Pin Outs, Connector, PWB, Board size, Signal Names, Embedded Computer Bus, PCI pin-out, 33MHz, Signal Assignments
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