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Sun-3/E SCSI/Ethernet Board Hardware
Reference Manual

Sun Microsystems, Inc.

•

2550 Garcia Avenue

•

Mountain View, CA 94043

•

415-960-1300

Pan No: 800-8027-02
Revision: A of June 1, 1988

Sun Microsystems and Sun Workstation are registered trademarlcs
of Sun Microsystems. Incorporated. Sun-3, Sun3, Sun-3Inx,
SunOS, and DVMA are trademarlcs of Sun Microsystems. Incorporated.
The Sun logo

•

is a registered trademark. of Sun Microsystems. Inc.

Copyright © 1988 by Sun Microsystems. Inc. - Printed in U.S.A.
This publication is protected by Federal Copyright Law, with all rights reserved.
No part of this publication may be reproduced, stored in a retrieval system,
translated, transcribed, or transmitted, in any form, or by any means: manual,
. electric. electronic. electromagnetic, mechanical, chemical, optical! or otherwise,
without prior explicit written permission from Sun Microsystems.

Contents

Chapter 1 Introduction ............................................................................;.............................

3

1.1. Using This Manual .........................................................................................................

3

Chapter 2 Unpackaging and Handling .....................................................................

7

Chapter 3 Board Architecture .........................................................................................

11

3.1. Addressing and Jumpering .........................................................................................

13

3.2. IntemIpts ...............................................................................................................................

15

3.3. Bandwidth and Capability ..........................................................................................

16

3.4. Cycle Priorities .................................................................................................................

16

Chapter 4 SCSI Interface ....................................................................................................

19

4.1. Control and Status Registers .....................................................................................

19

4.2. SCSI Buffer .........................................................................................................................

21

4.3. SCSI Reads and Writes ................................................................................................

21

Chapter 5 Ethernet Interface ............................................................................................

25

5.1. Ethernet Address ........................................................................................_.....;..............

26

5.2. Ethernet Transmits and Receives ........................................•...........;.............. ;.......

26

5.3. Ethernet Buffer ..................................................................................................................

27

5.4. Thin Ethernet .....................................................................................................................

27

5.5. External Transceiver ......................................................................................................

27

Chapter 6 VMEbus InteIface ...........................................................................................

31

- iii-

Cmtents - Continued

Appendix A Connectors ..............................................._......_................................._........

35

A.I. Rear Edge Connectors ....................................................._.........................................

35

A2. Front Panel Connectors ...............................................................................................

37

Appendix B System Design Considerations .........................................................

45

B.I. System Power Considerations .... _ ..._....................................................................

45

B.2. Environmental Characteristics ........................_.....................................................

45

B.3. P2 Bus Design ..................................................................................................................

45

Index .......................................................................................................................................................

47

-iv-

Tables

Table 3-1 Address Switch Assignment ..............................................................................

13

Table 3-2 Board Device Addressing ....................................................................................

14

Table 3-3 Estimated Board Bandwidths ............................................................................

16

Table 4-1 SCSI Control and Status Register Bits ........................................................

20

Table 5-1 Ethernet Control and Status Register Bits .................................................

25

Table 6-1 VMEbus ParaIIleters ...............................................................................................

31

Table A-I PI Connector Pins ..................................................................................................

35

Table A-2 P2 Connector Pins ........................................:.........................................................

37

Table A-3 SCSI Connector Pins ............................................................................................

39

Table A-4 Ethernet Connector Pins .....................................................................................

41

Table B-1 Board Power Requirements ...............................................................................

45

-v-

Figures

Figure 2-1 Shipping Container ................................................................................................

8

Figure 3-1 S3SE Block Diagram ...........................................................................................

12

Figure 3-2 Switch Locations ....................................................................................................

15

Figure A-I Front Panel Connectors .....................................................................................

38

Figure A-2 SCSI Connector Pins ...........................................................................................

40

-vii-

1
Introduction
Introduction .... _.................................................................................................................................

3

1.1. Using This Manual .........................................................................................................

3

Audience ............................................................................................................................

3

Fonts in Text ....................................................................................................................

3

Glossary ..............................................................................................................................

4

References .........................................................................................................................

4

1
Introduction
This manual describes the Sun-3/E SCSI/Ethernet Controller Board (S3SE) for
system programmers and engineers who wish to integrate this board into their
systems.
The S3SE board (501-8027) is a standard double-height Revision B VMEBus
board that provides one Ethernet interface, and one SCSI interface.

1.1. Using This Manual

This section provides infOlmation to help you use this manual. It includes a
description of the manual and the intended audience. a list of the different fonts.
a description of how the fonts are used. a glossary. and a list of references.
Note that this board should be used with the Sun-3/E CPU. which is described in
the Sun-31E CPU Hardware Reference Manual (pn # 800-8028).

NOTE

Audience

This board does NOT include a licensed Ethernet address. An Ethernet address
must be downloaded to the Ethernet circuits in this board from the Sun-31E CPU
board, which includes a licensed Ethernet address, or from some other source.
The audience includes anyone interested in understanding the S3SE board architecture at a block level. This might include designers, engineers, programmers,
technicians, and anyone else who wants or needs to know how the S3SE works.
Note that this manual concerns itself with external signals and timings; for internal signals and timings. see the Sun S3SE Engineering Manual.

Fonts in Text

In this manual, we use the following fonts to make things more clear:
o

Roman font is the normal font used for text.

o

Italic font is used for the proper name of a text or chapter to be referred to
for additional information. For example:
For more on loopback mode. see the Intel LAN Component User's
Manual.

o

Bold font indicates that a word or phrase requires additional- emphasis. For
example:
The host processor uses the bits in this register to communicate with
the SCSI interface.

3

Revision: A ofJune 1. 1988

4

Sun-3/E SCSI/Ethemet Board

Glossary

References

The following paragraphs list and describe the words and acronyms used in this
manual:
o

S3SE - The Sun-3/E SCSI/Ethemet Board.

o

SBC chip.

o

DMA data

Direct Memory Access. A method of transferring large blocks of

o

EDLC -

Ethernet Data Link Controller. The Intel 85286 Ethernet chip.

SCSI Bus Controller. This is the NCR 5380 SCSI Bus Controller

For additional information, see:
o

Intel LAN Component User's Manual- For programming information on
the Inter 85286 Ethernet Controller chip.

o

NCR 5380 SCSI Controller Design Manual - For information on programming the NCR 5380 SCSI Bus Controller.

o

The Sun-31E CPU Hardware Reference Manual- For information about
the Sun-3/E CPU board. (The S3SE board is almost always used with a
Sun-3/E CPU.)

o

Manual for AMD 7990 Thin Ethernet transceiver

Revision: A ofJune I, 1988

2
Unpackaging and Handling

U npackaging and Handling ..................................................................................................

7

2
Unpackaging and Handling
Sun-3/E boards are shipped in either individual containers or in lO-board tote
boxes. Inside either. the PC board is wrapped in an anti-static bag. Inside the
individual boxes. it is further protected by two pieces of anti-static foam. one
below it and one above. Inside the lO-board tote boxes. it is further protected by
corregated partitions.

CAUTION

To avoid damaging the board, keep it in its anti-static bag for as long as possible, and handle it only by its edges. Any person handling the board when
it is not in its anti-static bag should be wearing grounding straps, and should
only handle the board by its edges.
A single-board container appears in the following figure:

7

Revision: A of June 1. 1988

8

Sun-3IE SCSI/Ethemet Board

Figure 2-1

Shipping Container

2

400-IJ16-0(

CONVOLUTED rOAN SET
(ANTI-STAlIC)
PRINTED CIRCUIT
llOARB

STATIC SHIELDING
/

BAG TO BE PLAC£D

aVER PCI

4QO-1469-01
fOAM COLLAR


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