Digital Semiconductor 21041
PCI Ethernet LAN Controller
Data Sheet
Order Number: ECQAWWBTE
Revision/Update Information:
This document supersedes the
DECchip 21041 PCI Ethernet LAN
Controller Data Sheet (ECQAWWATE).
Digital Equipment Corporation
Maynard, Massachusetts
As of May 17, 1998, Digital Equipment Corporation's StrongARM, PCI Bridge, and Networking component businesses, along
with the chip fabrication facility in Hudson, Massachusetts, were acquired by Intel Corporation and transferred to Intel
Massachusetts, Inc. As a result of this transaction, certain references to web sites, telephone numbers, and fax numbers have
changed in the documentation. This information will be updated in the next version of this manual. Copies of documents that have
an ordering number and are referenced in this document, or other Intel literature may be obtained by calling
1-800-332-2717 or by visiting Intel's website for developers at:
http://developer.intel.com
The Intel Massachusetts Customer Technology Center continues to service your StrongARM Product, Bridge Product, and
Network Product technical inquiries. Please use the following information lines for support:
For documentation and general information:
Intel Massachusetts Information Line
United States:
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Outside United States:
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Electronic mail address:
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Phone (U.S. and international):
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Electronic mail address:
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Important Notice
February 1996
While Digital believes the information included in this publication is correct as of the date of
publication, it is subject to change without notice.
Digital Equipment Corporation makes no representations that the use of its products in the
manner described in this publication will not infringe on existing or future patent rights, nor do
the descriptions contained in this publication imply the granting of licenses to make, use, or sell
equipment or software in accordance with the description.
Digital Equipment Corporation 1996.
All rights reserved.
Printed in U.S.A.
DEC, DECchip, Digital, Digital Semiconductor, and the DIGITAL logo are trademarks of Digital
Equipment Corporation.
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All other trademarks and registered trademarks are the property of their respective owners.
Contents
1
Digital Semiconductor 21041 Overview . . . . . . . . . . . . . . . . . . . .
1
1.1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.2
Microarchitecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1.3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
2
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.1
Pinout and Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.2
Quick Pin Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
2.3
Pin Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
2.4
Signal Grouping by Function . . . . . . . . . . . . . . . . . . . . . . . . .
20
3
Electrical and Environmental Specifications . . . . . . . . . . . . . . . .
22
3.1
Voltage Limit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
3.2
Temperature Limit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . .
23
3.3
Supply Current and Power Dissipation . . . . . . . . . . . . . . . . .
24
3.4
PCI Bus Electrical Specifications . . . . . . . . . . . . . . . . . . . . . .
24
3.4.1
PCI I/O Voltage Specifications . . . . . . . . . . . . . . . . . . . . .
24
3.4.2
PCI Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
3.4.3
PCI Clock Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .
28
3.4.4
Other PCI Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
3.5
AUI and Twisted-Pair dc Specifications . . . . . . . . . . . . . . . . .
31
3.6
Serial Interface Attachment Specifications . . . . . . . . . . . . . . .
32
3.6.1
Serial Clock dc Specifications . . . . . . . . . . . . . . . . . . . . . .
32
3.6.2
Serial Clock Timing
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
3.6.3
Internal SIA Mode AUI Timing--Transmit . . . . . . . . . . .
34
3.6.4
Internal SIA Mode AUI Timing--Receive . . . . . . . . . . . .
35
3.6.5
Internal SIA Mode AUI Timing--Collision . . . . . . . . . . . .
35
3.6.6
Internal SIA Mode 10BASE-T Interface
Timing--Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37
3.6.7
Internal SIA Mode 10BASE-T Interface
Timing--Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39
3.6.8
Internal SIA Mode 10BASE-T Interface Timing--Idle
Link Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40
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