Compact Peripheral Component Interface Express
cPCIe Bus
[cPCIe Description] [cPCIe Interface ICs]
[cPCIe Connectors] [cPCIe
PinOut] [OnLine Standards]
[cPCIe COTS Cards] [cPCIe
Chassis] [cPCIe Backplanes]
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The newest version in the cPCI form factor is called cPCIe and trades in the PCI bus for the PCIe bus, but remains in the same board form factor. |
Most board formats are migrating to the PCIe interface for electrical signaling.
Some formats keep the PCI bus for legacy applications when room allows, otherwise the boards become PCIe only.
Of course any time a board specification take on PCIe, that only applies to the signals and electrical specifications.
Addition features of cPCI include; live insertion support (Hot-Swap),
supports two independent buses on the backplane (on different
connectors), and soon Infiniband, Ethernet, and Star Fabric support
(Switched Fabric based
systems).
PXI defines cPCI for Instrumentation adding
additional enhancements, with the same form factor as cPCI, using the PCI bus.
PXI Express adopts the PCIe interface into the PXI standard [which had been PCI over cPCI].
PXI Express uses both PXI connectors and new connectors for PXI Express.
EXP.0 CompactPCI Express
PICMG 2.0 Rev 3.0 CompactPCI Core Specification; See also the
PCI Page
PICMG 2.1 Rev2.0 CompactPCI Hot Swap
PICMG 2.2 Rev1.0 VME64x on CompactPCI [VME64x bus on the P4/P5
connectors]
PICMG 2.3 Rev1.0 PMC on CompactPCI
PICMG 2.4 Rev1.0 IP on CompactPCI
PICMG 2.5 Rev1.0 CompactPCI Computer Telephony
PICMG 2.7 Rev1.0 6U CompactPCI Dual System Slot
Specification
PICMG 2.9 Rev1.0 CompactPCI System Management
PICMG 2.10 Rev1.0 Keying of CompactPCI Boards and Backplanes
PICMG 2.11 Rev1.0 CompactPCI Power Interface
PICMG 2.12 Rev2.0 Hot Swap Infrastructure Interface
PICMG 2.14 Rev1.0 CompactPCI Multicomputing Specification
PICMG 2.15 Rev1.0 PCI Telecom Mezzanine/Carrier Card [H.110 [TDM
bus] Computer Telephony]
PICMG 2.16 Rev1.0 CompactPCI Packet Switching Backplane
Specification [cPSB] (GigaBridge, Ethernet)
PICMG 2.17 Rev1.0 CompactPCI StarFabric Specification
PICMG 2.20 Rev1.0 CompactPCI Serial Mesh Backplane
Specification
PXI Rev 1.0 PXI; PCI eXtensions for Instrumentation
PXI Express PCI Express Extensions for Instrumentation
PICMG {Compact PCI Industrial Computer Manufacturers Group}, [www.picmg.org]
Card dimensions [size] / Form Factor
Pinouts for the other connectors found on a 6U card are user defined.
While the pinout for a 3U card is fully defined by the links above. The
3U size card use the J1, P2, P3, P4 connectors.
Compact PCIe is the PCI Express bus on a different board form factor, so;
Integrated Circuit [IC] manufacturers are listed on the PCIe Bus page.
The electrical interface is the same, only the board size is changed.
Of course mechanically the connector style and their pin outs change as well.
IC Manufacturers {All other types}
cPCI uses 2mm 'Hard Metric'; IEC 1076-4-101, a number of different pin
arrangements. Normally the outside Ground rows (which are compression
pins) 'Z' and 'F' are not counted as pins. OEM pin numbering may be by
cPCI or in accordance with IEC 61076-4-101 (which is reversed). The term
"Hard Metric" only means that metric dimensions are preferred ~ with-out
regard to inches.
cPCI 2mm connectors mating distances [12.50mm] matches the 96 pin DIN
41612 connectors used with other EuroCard packaging [IEC 273 or IEEE
1101, 1101.10], like VMEbus. FutureBus connectors, which also use 2mm
style has a mating distance of 10mm, and is not compatible with cPCI
connectors.
The types below are counting signal pins (not the ground rows), as
indicated on many data sheets:
The card side connector is Male (Right-Angle), the back plane side is Female (Straight).
Connector Vendors;
AVX
Meritec {2mm cPCI backplane cable assemblies, off the shelf product and customizable products.}
Positronic Industries {Power Module Connectors}
Comm Con Connectors Inc. has a nice page showing the different types.
CompactPCI [cPCI] Chassis will be between 1 and 8 slots (the maximum).
Printed Wiring Boards [PWB] are spaced on 0.8 inch centers.
The chassis may accept 3U cards, or 3U and 6U cards. The chassis may have
a separate card cage to handle the 3U cards.
The chassis shall provide a +5volt, +/- 12volt and a 3.3volt supply @
maximum ripple 50mV. I believe the Telcom version provides 48 volts as
the system power.
The backplane is passive. The bus requires one card acting as the systems
controller residing at either end of the back-plane (chassis), termed the
System Slot. The remaining cards (slots) are termed the Peripheral Slots.
PXI, cPCI for Instrumentation uses the same chassis. cPCI and PXI Chassis manufacturers
In cPCI, the system slot may reside in any slot of the back plane with the other 7 slots as peripheral cards. In PXI, the left most slot is the system slot followed on the right by 7 peripheral slots. In addition, 3 other slots, with do not contain back plane connectors may reside to the left of the system slot. These additional 3 slots provide expansion (wider card) for the system card.
CompactPCI [cPCI] uses the Euro Format [dimensions], see figure above.
IEEE 1101.1 Base Document for Mechanics
IEEE 1101.10 Mechanics for VME Boards and Subracks
IEEE 1101.11 Mechanics for Rear Transition Modules
cPCIe Card manufacturers and vendors, for a list of board and backplanes.
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