21555 Datasheet PDF - Intel Corporation

Part Number 21555
Description Non-Transparent PCI-to-PCI Bridge
Manufacturers Intel Corporation 
Logo Intel Corporation Logo 

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21555 Non-Transparent PCI-to-
PCI Bridge
Specification Update
December 2002
Notice: The 21555 may contain design defects or errors known as errata. Characterized errata
that may cause the 21555’s behavior to deviate from published specifications are documented in
this specification update.
Order Number: 278337-008

21555 equivalent
Revision History
Documentation Changes
The following changes have been made to this document:
21555 bridge steppings have changed to A3. Markings have been updated
as well. See Markingson page 11.
Added related document to Affected Documents/Related Documentson
page 7.
008 Status for Errata 1 and 2 are changed to Fixed. See Errataon page 9.
Specification change - 21555 bridge PCI compliancy now at Version 2.3. See
Specification Changeson page 9.
Documentation changes - Data sheet and User Manual include 2.3
compliance information. See Added Section 3.1.1 PCI Local Bus
Complianceon page 22. and Change to Tables 61 and 62 in Section 16.5.2
on page 22.
007 Added Errata 2.
006 Added Errata 1.
Corrected PBGA package description from 2-layer to 4-layer within this
Documentation changes: (See page 9)
004 Replaced last row of Table 2-3. See Section 14 on Page 21.
Changed l_stat description in Section 11-5. See Section 15 on Page 22.
Documentation changes: (See page 8)
Added Markings Table on page 11.
Insert reference to 21554 for improved accuracy. See Section 3 on Page 16.
Remove misplaced sections from Chapter 4. See Section 4 on Page 17.
Remove unnecessary parenthetical phrase. See Section 5 on Page 19.
Change p_clk and s_clk signal description. See Section 6 on Page 19.
Remove incorrect sentence from Hot Swap input pin description. See Section
7 on Page 19.
003 Change or remove three (3) references to the 21554. See Section 8 on Page
Update D7:D6 byte offset descriptions. See Section 9 on Page 20.
Remove three references to CLS=4. See Section 10 on Page 20.
Additional information about JTAG pin termination requirements. See Section
11 on Page 20.
Emphasize special handling of the JTAG tms signal for Hot insertion
applications.See Section 12 on Page 20.
Changed Section 12.2.1 and JTAG description. See Section 13 on Page 21.
Added specification change to PBGA package dimensions for coplanarity
maximum value.
This new Specification Update document contains:
One Specification Change that announces coplanarity value changes.
001 Two Documentation changes that:
Correct the JTAG timing specifications.
Correct the coplanarity values in the datasheet document.
21555 Non-Transparent PCI-to-PCI Bridge Specification Update


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