Compact Peripheral Component Interface Express
cPCIe Bus
[cPCIe Description] [cPCIe
Interface ICs]
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PinOut] [OnLine Standards]
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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 remaining in the same board form factor. CompactPCI Express defines the connector, electrical, and mechanical requirements of 3U/6U System Boards, Peripheral Boards, Switch Boards, and Backplanes in the same cPCI form factor. CompactPCI Express is also called CPCIe, cPCIe, or CompactPCIe. PCI Express [PCIe] resides on a 3U x 160mm form factor or 6U form factor in a Compact PCI [cPCI] environment. The PCI Express 16x and 8x lanes are routed on the P1 and P2 connectors, all other connectors are unused for additional I/O. See the CompactPCI, or PCI Express listing for additional information. cPCI [Compact Peripheral Component Interface] is electrically identical to the PCI specification, except it uses the Euro (VME) card 3U/6U format with 2mm connectors. The cPCI bus uses 8, 16, 32, or 64 bit transfers at up to 264MBps. 64 bit PCI transfers may be used in either 3U or 6U size cards. 6U boards contain additional pins for user defined I/O. 3U card dimensions are 100mm x 160mm x 1.6mm thick, 6U card dimensions are 233.35mm x 160mm x 1.6mm thick. |
The PCI spec defines the Electrical requirements for the interface. No
bus terminations are specified, the bus relies on signal reflection to
achieve level threshold. The first version of the PCI bus ran at 33MHz
with a 32 bit bus (133MBps), then added 64 bits at 33MHz (266MBps). The
current version runs at 66MHz with a 64 bit bus (532Mbps). The PCI bus
operates either synchronously or asynchronously with the "Mother Board"
bus rate. While operating asynchronously the bus will operate at any
frequency from 66MHz down to (and including) 0Hz. Flow control is added
to allow the bus to operate with slower devices on the bus, allowing the
bus to operate at their speed. PCI is an unterminated bus, the signals
relay on signal
reflections to attain their final value. The PCI specification has
been port-ed to a number of other form factors.
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. PXI adds
additional signals and chassis requirements just like VXI adds to VME. Unlike VXI, PXI does not
require that the card be enclosed in a metal shield.
EXP.0 CompactPCI Express
PICMG 2.0 Rev 3.0 CompactPCI Core Specification; See also the
PCI Page {This web
site}
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
Compact PCI Industrial Computer Manufacturers Group {PICMG} .. IEEE {Institute of Electrical and Electronic Engineers, Inc.}
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.
Integrated Circuit [IC] manufacturers are listed on the PCIe Bus page.
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).
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.
Electronic Design Key words: CompactPCI, Compact Peripheral Component Interface, cPCI, Compact PCI, cPCI Pinouts, PCI bus, P1/J1 Pinouts, Pin Outs, Connector, Signal Names, 5row, Physical, Mechanical, Size, Card dimensions, Board dimensions, Euro Format, Type, Connector Style, Description, Intro, Brief, ICs, Integrated Circuits, Chassis, COTS, Cards, Vendors, Products, Euro card Manufacturers, Embedded Computer Bus, Standard, Compact PCI Specification, Pinout, Standard
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