S21152BB Intel Corporation, S21152BB Datasheet

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S21152BB

Manufacturer Part Number
S21152BB
Description
Manufacturer
Intel Corporation
Datasheet

Specifications of S21152BB

Case
QFP
Dc
04+

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21152 PCI-to-PCI Bridge
Product Features
Complies fully with Revision 2.1 of the
PCI Local Bus Specification
Complies fully with Revision 1.1 of the
PCI-to-PCI Bridge Architecture
Specification
Complies fully with the PCI Bus Power
Management Specification
Complies fully with the Advanced
Configuration Power Interface (ACPI)
Specification
Provides enhanced address decoding:
Implements delayed transactions for all PCI
configuration, I/O, and memory read
commands—up to three transactions
simultaneously in each direction
Provides arbitration support for four
secondary bus devices:
— A 32-bit I/O address range
— A 32-bit memory-mapped I/O address
— A 64-bit prefetchable memory address
— ISA-aware mode for legacy support in
— A programmable 2-level arbiter
— Hardware disable control, permitting use
range
range
the first 64KB of I/O address range
of an external arbiter
Intel’s second-generation 21152 PCI-to-PCI Bridge is fully compliant with PCI
Local Bus Specification, Revision 2.1. The 21152 is pin-to-pin compatible with
Intel’s 21052, which is fully compliant with PCI Local Bus Specification,
Revision 2.0. The 21152 provides full support for delayed transactions, which
enables the buffering of memory read, I/O, and configuration transactions.
VGA addressing and VGA palette
snooping support
Includes downstream lock support
Allows 72 bytes of read data buffering in
each direction
Provides concurrent primary and secondary
bus operation to isolate traffic
Supports PCI transaction forwarding for the
following commands:
Allows 88 bytes of buffering (data and
address) for posted memory write
commands in each direction—up to five
posted write transactions simultaneously in
each direction
Provides five secondary clock outputs:
Supports both 5-V and 3.3-V signaling
environents
— All I/O and memory commands
— Type 1 to Type 1 configuration
— Type 1 to Type 0 configuration
— All Type 1 to special cycle configuration
— Low skew, permitting direct drive of
— Individual control clock through
commands
commands (downstream only)
commands
option slots
configuration space
Brief Datasheet
Order Number: 278227-001
September 1998

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S21152BB Summary of contents

Page 1

PCI-to-PCI Bridge Product Features Intel’s second-generation 21152 PCI-to-PCI Bridge is fully compliant with PCI Local Bus Specification, Revision 2.1. The 21152 is pin-to-pin compatible with Intel’s 21052, which is fully compliant with PCI Local Bus Specification, Revision 2.0. The ...

Page 2

... Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800- 548-4725 or by visiting Intel’s website at http://www.intel.com. Copyright © Intel Corporation, 1998 *Third-party brands and names are the property of their respective owners. ...

Page 3

The 21152 allows the two PCI buses to operate concurrently. This means that a master and a target on the same PCI bus can communicate while the other PCI bus is busy. This traffic isolation may increase system performance in ...

Page 4

PCI-to-PCI Bridge Multidevice PCI Option Cards Option card designers can use the 21152 to implement multiple-device PCI option cards. Without a PCI-to-PCI bridge, PCI loading rules would limit option cards to one device. The PCI Local Bus Specification loading ...

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Support, Products, and Documentation If you need technical support, a Product Catalog, or help deciding which documentation best meets your needs, visit the Intel World Wide Web Internet site: http://www.intel.com Copies of documents that have an ordering number and are ...

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