Technical Doc

CompactPCI Serial is a new industrial standard for modular computer systems. It is based on the established PICMG 2.0 CompactPCI standard which uses the parallel PCI bus for communication among a system’s card components. In contrast to this, CompactPCI Serial uses only serial point-to-point connections.

CompactPCI Serial was officially adopted by the PCI Industrial Computer Manufacturers Group PICMG as PICMG CPCI-S.0 CompactPCI Serial in March 2011.

With CompactPCI Serial, the CompactPCI architecture moves to serial high-speed interconnects, and more data can be transferred at higher speeds using PCI Express. Additional high speed interfaces, including Ethernet, SATA, and USB are supported.

Technical Doc
  • Description

With CompactPCI Serial, the CompactPCI architecture moves to serial high-speed interconnects, and more data can be transferred at higher speeds using PCI Express. Additional high speed interfaces, including Ethernet, SATA, and USB are supported.

A typical configuration of one system slot and up to eight peripheral slots does not need switches and bridges. Using the proven 19” mechanics of the IEC 1101 family, proven with CompactPCI and VME, the standard introduces a new rugged additional connector with a signal density of up to 184 pin pairs (on 3U) and transmission frequencies of 12 Gb/s. Hot Swap of boards during operation is supported, as it was with original CompactPCI.

Each system is organized as follows: a System Slot, usually the CPU and often a complete single board computer, provides 8 PCI Express links, 8 SATA/SAS, 8 USB 2.0/3.0 and 8 Ethernet interfaces plus signals for general system management and up to eight peripheral slots.

Each peripheral slot supports 1 PCI Express link, 1 SATA/SAS and 1 USB 2.0/3.0 interface. Each slot can support up to 8 Ethernet interfaces to build a full mesh interconnect without an external switch. All interfaces are accessible at the same time.

The pin assignment of the system and the peripheral slot is congruent. In this way it is possible to plug a system slot board into each peripheral slot to support symmetrical multiprocessing. This is a significant advance over other 3U/6U standards. Star topologies are supported and each slot is given equal priority: PCI Express, SATA/SAS and USB. All peripheral slots are identical except two that are connected via PCI Express links by 8 lanes.

Ethernet is normally configured as a full mesh. Although alternate topologies are supported. Transmission is based on the proven standards for copper connections up to 10GbaseT to allow configuration of redundant, safety-critical systems. This is important for demanding mil/aero, transportation, security, and many medical applications.

PICMG CPCI-S.0 defines a single 12-V power supply both for system slots and peripheral slots.
Revision 2, released on June 16, 2015 provides minor and incremental improvements:

  • New connector, RJ6, is optional and provides an additional 48 pins of rear I/O from the System Slot. The total available I/O pins from the System Slot is now 58.
  • Conduction cooling mechanicals improved (maximum handle size is now defined)
  • The System Slot can now be located on the right side of the card rack as well as the left side.
  • I2C management bus further defined
  • Location of SATA coupling capacitors clarified
  • Features

Communication Fast serial data transfer supporting up to 12 Gbit/s and more.
Architecture Single Star: one Single Board Computer + eight Peripheral cards Full Mesh: Nine Single board Computers in full mesh configuration.
Mechanical Compatible with IEEE 1101 and with the Eurocard 3U/6U format.
Transfer 20x data transfer improvement over PCI Express lanes as compared to CompactPCI. Total data transfer improvement of 80x when Ethernet, SATA, and USB are used.
Hot Swap Supports Hot Swap of boards while a system is operating.
Cooling Convection cooled and conduction cooled modules are defined.
Board Voltages 12V
Power Dissipation Max 60W for one 3U slot, 150W are permitted for 6U slots.
Connector AirMax connector (FCI, Amphenol TCS) offers space for up to 184 pin pairs on a 3U board. The plug connector is placed on the plug-in card, while the receptacle connector is located on the backplane.

  • Products

Microracks and Systems
Single Board Computer
Boards and Modules
Carriers
Backplanes
Power Supplies