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Peripheral Component Interconnect
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PCI (Peripheral Component Interconnect) is a type of computer bus for attaching or inserting peripheral devices into a computer. The PCI standard was first proposed by Intel in 1990 and was widely implemented in computers by 1995. Today, the specifications for PCI and its variants are maintained by the PCI-SIG (PCI Special Interest Group), a consortium of over 900 companies.
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PCI (Peripheral Component Interconnect) A high-performance (by current standards) computer expansion slot designed by Intel. PCI allows for 32- or 64-bit bus specification. PCI is described as high-bandwidth and processor-independent data path between the CPU and high-speed peripherals. The PCI spec allows for the capability to transfer up to 132 megabytes per second at a bus clock speed of 33 MHz (although the current rates being claimed by manufacturers are more commonly in the 30 Mb/sec range). This speed makes it especially suitable for high data rate applications like digital audio and video. PCI slots are found in the current generations of both PC and Macintosh personal computers.
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NEW YORK -- Just as two big players in the Peripheral Component Interconnect (PCI) Special Interest Group (SIG) last week launched a campaign to boost its multimedia design specification, the rival Video Electronics. Standards Association (VESA) VL-bus camp opened a new front: lobbying IBM to embrace VL-bus implementations for its PowerPC hardware reference platform.
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C PCI -- Peripheral Component Interconnect was originally designed to meet the video needs of the latest GUIs. Typically a 32-bit or 64-bit local bus, PCI is more than 20 times faster than ISA (Industry Standard Architecture).
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In their place new, high speed, point-to-point, component interconnection standards have been developed. System Packet Interface (SPI) is one of the more popular interfaces used in the packet processing portion of the line card, while standards such as the Common Switch Interface (CSIX) and the Network Processing Forum Streaming Interface (NPSI) are used for the Switch Fabric interface portion of the line card. The SPI-3 specification is designed to operate at up to OC-48 (2.5 Gbps). The SPI-4 specification is designed to operate at up to OC-192 (10 Gbps). Both of these specifications include backpressure signaling and control, and the implementation of up to 256 logical ports. Since these are point-to-point protocols some kind of interface device must be used if more than two devices need to be interconnected on the line card.
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Peripheral Component Interconnect