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Intel - PCI to PCI Bridge

Numéro de référence S21152
Description PCI to PCI Bridge
Fabricant Intel 
Logo Intel 





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S21152 fiche technique
21e1t45U2.cPomCI-to-PCI BridgeDatasheet
ataSheProduct Features
w.D Complies fully with Revision 2.1 of the PCI
w Local Bus Specification,
w Complies fully with Revision 1.1 of the
PCI-to-PCI Bridge Architecture
mSpecification,
Complies fully with the Advanced
oConfiguration Power Interface (ACPI)
Specification
.cComplies fully with the PCI Power
Management Specification, Revision 1.01
UImplements delayed transactions for all PCI
configuration, I/O, and memory read
t4commands—up to three transactions
simultaneously in each direction
Allows 88 bytes of buffering (data and
eaddress) for posted memory write
commands in each direction—up to three
etransactions simultaneously in each
direction
hAllows 72 bytes of read data buffering in
each direction
SProvides concurrent primary and secondary
bus operation to isolate traffic
taProvides five secondary clock outputs
— Low skew, permitting direct drive of
aoption slots
— Individual clock control through
.Dconfiguration space
Provides arbitration support for four
secondary bus devices
— A programmable 2-level arbiter
— Hardware disable control, permitting use
of an external arbiter
Provides enhanced address decoding
— A 32-bit I/O address range
— A 32-bit memory-mapped I/O address
range
— A 64-bit prefetchable memory address
range
— ISA-aware mode for legacy support in
the first 64 KB of I/O address range
— VGA addressing and VGA palette
snooping support
Supports PCI transaction forwarding for the
following commands
— All I/O and memory commands
— Type 1 to Type 1 configuration
commands
— Type 1 to Type 0 configuration
commands (downstream only)
— All Type 1 to special cycle configuration
commands
Includes downstream lock support
Supports both 5 V and 3.3 V signaling
environments
w1. 21152–AB and later revisions only. The 21152–AA does not implement this feature.
ww .DataSheet4U.comOrder Number: 278060, Revision: 002US
www April 2005

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