CompactPCI PlusIO

CompactPCI PlusIO is an extension of the industry standard PICMG 2.0 CompactPCI for modular computer systems. CompactPCI PlusIO was in November 2009 officially recognized by the PCI Industrial Computer Manufacturers Group (PICMG ) and PICMG 2.30 CompactPCI PlusIO accepted. PICMG 2.30 is 100% compatible to CompactPCI and defines a migration path to the future standard, CompactPCI Serial. The specification defines a pinout on the back wall, which focuses on modern, high-speed serial point-to- point connections. The new technology, which replaces the parallel CompactPCI bus includes both CompactPCI Serial and CompactPCI PlusIO.

History

The standard CompactPCI includes a main bus connector, J1, and user defined pins for Ein-/Ausgabe (User I / O) as well as a 64- bit extension for the old PCI bus on connector J2. J1 and J2 are the only connectors on 3U single Eurocard. The CompactPCI definition for 6U double Eurocard cards contains additional connector (J3, J4, J5 ) for back Ein-/Ausgabe. There are, however, only for the J3 a real standard for rear Ein-/Ausgabe: in the PICMG CompactPCI Packet Switching Backplane 2:16, defines the Ethernet interfaces on the backplane of 6U cards. In recent years, high-speed serial point-to- point connections with the state of the art and now gradually solve the classic bus architecture into computers. In addition, 3- U systems are used very often because of their small footprint. This is especially true for modular embedded applications, for example in the area of ​​communication. As a result, several manufacturers were trying to develop their own Rückwand-I/O-Konzepte using the J2 connector, but could not access any standard to make their J2 pin-out compatible with other assemblies. Another approach to realize high-speed serial interfaces, were so-called switched fabrics, which were connected to each other via additional switches and bridges. This was associated with higher costs and the resulting solutions were too specialized to be compatible. The CompactPCI standard in its current form does not provide standardized solution for the kind of modular networking that is required for the future. The additional specification PICMG 2.30 CompactPCI PlusIO offers these networking on the known CompactPCI platform. However, it remains compatible with the existing standard, it adds a new definition of the rear connector J2, and so adds a number of serial ports add to quick and standardized backplane I / O provide in 3U format. With this serial point-to -point connections CompactPCI PlusIO includes the gap between the parallel and the serial CompactPCI standard CompactPCI Serial.

Interfaces

PICMG 2.30 CompactPCI PlusIO defines the following interfaces on the backplane connector J2:

  • 4 x PCI Express (one lane)
  • 2 x Ethernet 1000Base - T
  • 4 x USB 2.0
  • 4 x SATA / SAS

Backplane connector

The extension PICMG 2.30 introduces a new connector type for the J2 on the plug, specifically a Ultra Hard Metric ( UHM ) plug. His " virtual coaxial box" shielding technology reduces crosstalk at high speeds. The connector supports high frequencies of 5 Gbit / s, and that even if he is mated with the unshielded standard CompactPCI connector with 2mm Hard Metric Male connector. The corresponding plug P2 to the backplane remains the same with CompactPCI, as well as the plug J1/P1.

Compatibility with CompactPCI and CompactPCI Serial

PICMG 2.30 gives the pins on the J2 a specified interface functionality. Thus, the operation is no longer possible with 64- bit bus. The new connector type of the J2 itself is 100 % compatible with the existing connector. The bus connector J1 corresponds to the CompactPCI definition. Overall CompactPCI PlusIO is 100% compatible with the previous 32 -bit CompactPCI in the formats 3U and 6U ( single and double Eurocards ). At the same time, the serial I / O networking and powerful connectors to the specification form a bridge towards the future system architecture of CompactPCI Serial. Hybrid backplanes support multiple modules of three different standards PICMG 2.0, 2:30 and CPCI S.0.

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