PCI LOCAL BUS
PCI OVERVIEW
The PCI (Peripheral Component Interconnect) Local Bus is a high
performance, 32-bit or 64-bit bus with multiplexed address and data
lines. It is intended for use as an interconnect mechanism between
highly integrated peripheral controller components, peripheral add-in
boards and processor/memory systems.
The "local bus" moves peripheral functions with high bandwidth re-
quirements closer to the system’s processor bus and can produce sub-
stantial performance gains with graphical user interfaces (GUI’s) and
other high bandwidth functions (i.e., full motion video, SCSI,
LAN’s, etc.).
The PCI Local Bus accommodates future system requirements and is
applicable across multiple platforms and architectures.
The PCI component and add-in card interface is processor inde-
pendent, enabling an efficient transition to future processor genera-
tions, by bridges or by direct integration, and use with multiple
processor architectures. Processor independence allows the PCI
Local Bus to be optimized for I/O functions, enables concurrent
operation of the local bus with the processor/memory subsystem, and
accommodates multiple high performance peripherals in addition to
graphics. Movement to enhanced video and multimedia displays and
other high bandwidth I/O will continue to increase local bus
bandwidth requirements. A transparent 64-bit extension of the 32-bit
data and address buses is defined, doubling the bus bandwidth and of-
fering forward and backward compatibility of 32-bit (132MB/s peak)
and 64-bit (264MB/s peak) PCI Local Bus peripherals.
PCI REFERENCE
TECHNICAL REFERENCE
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Summary of Contents for SB586TCP/166
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