DIGITAL Semiconductor 21140A
PCI Fast Ethernet LAN Controller
Data Sheet
Order Number:
EC–QN7PF–TE
Revision/Update Information
:
This is a revised document. It supersedes the
DIGITAL Semiconductor 21140A PCI Fast
Ethernet LAN Controller Data Sheet,
EC–QN7PE–TE.
This document describes the 21140–AD,
the 21140–AE, and the 21140–AF.
.
Hardware Version:
Digital Equipment Corporation
Maynard, Massachusetts
http://www.digital.com/semiconductor
Important Notice
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
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or by visiting Intel’s website for developers at:
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Outside United States:
Electronic mail address:
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December 1997
While DIGITAL believes the information included in this publication is correct as of the date of publication, it is
subject to change without notice.
This data sheet, including associated product update information, defines a particular variant of this product. Please
read the Support, Products, and Documentation section in this document to determine how to obtain current product
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Contents
1
21140A Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
1.2
1.3
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Microarchitecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
2
3
2
Pinout
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
2.2
2.3
Signal Reference Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Grouping by Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
8
18
20
3
Electrical and Environmental Specifications
. . . . . . . . . . . . . . . . . .
3.1
3.2
3.3
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.5
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.7
3.7.1
3.7.2
3.7.3
3.7.4
3.7.5
3.8
3.8.1
3.8.2
3.9
3.10
3.11
3.11.1
3.11.2
Voltage Limit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Limit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Current and Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCI Electrical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCI I/O Voltage Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCI Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCI Clock Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other PCI Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial, MII/SYM, Boot ROM, Serial ROM, and
General-Purpose Port Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Network Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial 10-Mb/s Timing—Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial 10-Mb/s Timing—Collision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial 10 Mb/s Timing—Receive, Start of Packet . . . . . . . . . . . . . . . . . . . . .
Serial 10-Mb/s Timing—Receive, Start, and End of Packet . . . . . . . . . . . . .
MII/SYM Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MII/SYM 10/100-Mb/s and 10-Mb/s Timing—Transmit . . . . . . . . . . . . . . . . .
MII/SYM 10/100-Mb/s Timing—Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MII/SYM 10/100-Mb/s Timing—Signal Detect . . . . . . . . . . . . . . . . . . . . . . . .
MII/SYM 10/100-Mb/s Timing—Receive Error. . . . . . . . . . . . . . . . . . . . . . . .
MII/SYM 10/100-Mb/s Timing—Carrier Sense and Collision . . . . . . . . . . . . .
Boot ROM Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boot ROM Read Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boot ROM Write Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial ROM Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Register Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Joint Test Action Group—Test Access Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JTAG DC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JTAG Boundary-Scan Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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