Peripheral Component Interconnect


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Related to Peripheral Component Interconnect: Peripheral Component Interconnect Express

peripheral component interconnect

[pə‚rif·ə·rəl kəm‚pō·nənt ′in·tər·‚kə·nek]
(computer science)
A bus standard for connecting additional input/output devices (such as graphics or modem cards) to a personal computer. Abbreviated PCI.

Peripheral Component Interconnect

(hardware)
(PCI) A standard for connecting peripherals to a personal computer, designed by Intel and released around Autumn 1993. PCI is supported by most major manufacturers including Apple Computer. It is technically far superior to VESA's local bus. It runs at 20 - 33 MHz and carries 32 bits at a time over a 124-pin connector or 64 bits over a 188-pin connector. An address is sent in one cycle followed by one word of data (or several in burst mode).

PCI is used in systems based on Pentium, Pentium Pro, AMD 5x86, AMD K5 and AMD K6 processors, in some DEC Alpha and PowerPC systems, and probably Cyrix 586 and Cyrix 686 systems. However, it is processor independent and so can work with other processor architectures as well.

Technically, PCI is not a bus but a bridge or mezzanine. It includes buffers to decouple the CPU from relatively slow peripherals and allow them to operate asynchronously.
References in periodicals archive ?
An onboard single/dual Gigabit LAN via the Peripheral Component Interconnect Express host interface.
The PLX Adaptive Switch Fabric Architecture enables Peripheral Component Interconnect (PCI)-based telecommunications, data communications and embedded systems to incorporate 224 PCI bus segments, aggregate tens of gigabits per second, and direct connection of two adjacent PCI devices on the fabric up to 15 feet away, via a high-performance link.
To solve the dilemma, IBM offers a special Peripheral Component Interconnect card equipped with an Intel 700-MHz processor that fits into the AS/400 chassis and runs a copy of Windows NT/2000.

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