Atom TARGET386EX User Manual

Contents

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

The Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Name Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Problem? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Contents - Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Utility Disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Anti-Static Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electromagnetic Compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Section 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Section 2. Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation & Monitor Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Section 3. Links and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Default Link Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

User Configuration Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Section 4. Using the TARGET386EX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Programmable Memory and I/O Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Memory Map After Power-up/Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

I/O Map After Power-up/Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

On-Board Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

User Links and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2192-08270-000-000

J539 TARGET386EX

Page 1

TARGET386EX

User Manual

Interrupt Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

STEbus Support [NOT SBC VARIANTS] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

PC/104 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Battery Back-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Utility Disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

The Next Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Section 5. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Appendix A. Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Appendix B. Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Appendix C. Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

The STEbus and the TARGET386EX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

The PC/104 and the TARGET386EX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

STEbus and PC/104 interaction on the TARGET386EX . . . . . . . . . . . . . . . . . . . . 36

Appendix D. Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Appendix E. Product Issue Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Appendix F. Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

J539 TARGET386EX
2192-08270-000-000

Page 2

Revision History

2192-08270-000-000Revision History

J539 TARGET386EX

Page 3

PCB

V 1 Iss 2

V1 Iss 2

A

B

961107 First release.
961213 Minor edits throughout the manual.

Manual

Issue

Comments

© Copyright Arcom Control Systems Ltd. 1996

The choice of boards and systems is the responsibility of the buyer, and the use to which they are put cannot
be the liability of Arcom Control Systems Ltd. However, Arcom’s sales team is always available to assist you
in making your decision.

J539 TARGET386EX
2192-08270-000-000 Revision History

Page 4

Preface

The Manual

This manual details the operation and features of Arcoms
TARGET386EX boards. It has been designed as both a guide to
getting started with the TARGET386EX Development Kit and a
reference for the hardware features of the board.

Name Conventions

Throughout this document an asterisk * suffix to a signal name
denotes that a signal is active low (e.g. DATACK*).

All numbers are in decimal unless otherwise indicated. Where a
number is suffixed by h the value is in hexadecimal format.

Problem?

If you have any problems finding information about this board, or
the board fails to work, or something is missing, please contact
Arcom Customer Support at our offices in Cambridge, UK.

If the engineers are busy please leave a message, or alternatively,
send a facsimile message. Please state:

 Your name, telephone and facsimile numbers
 The time and date
 The product name
 The problem

Arcom Customer Support: Tel: [phone]

Fax: [phone]
For US callers: Tel: [phone]
For US callers: Fax: [phone]
Internet: [e-mail]

[e-mail]

Arcom Main Switchboard: Tel: [phone]

Fax: [phone]

Contents - Packing List

In your TARGET386EX Development Kit package you should have:

 A TARGET386EX in a sealed anti-static bag.
 A document titled TARGET386EX User Manual (this document)
 An SVIF1 Development Interface Module
 A CAB-SVIF1 Development Interface Cable
 A high density 3 1/2 floppy disk titled TARGET386EX Monitor

Utility Disk

 A document titled TARGET386EX Monitor Manual

2192-08270-000-000Preface

J539 TARGET386EX

Page 5

 A high density 3 1/2 floppy disk titled TARGET386EX Board

Software Library

 A document titled TARGET386EX Board Software Library

Shortform

 A high density 3 1/2 floppy disk titled TARGET386EX

SourceVIEW
 A document titled TARGET386EX SourceVIEW
 Intel ApBUILDER software pack

Utility Disks

Three utility disks are provided with the TARGET386EX. One
contains source and assembled code for the monitor software pre­installed on the board together with a utility to convert assembled
code into Intel Hex format to allow code download to the board via
the monitor. The second disk contains C library routines for setting
up and controlling the board, for use in applications code together
with a disk based TARGET386EX Board Software Library Manual.
The third disk contains Arcoms SourceVIEW development and
debugging environment for use with the TARGET386EX.

Anti-Static Handling

This board contains CMOS devices which could be damaged in the
event of static electricity being discharged through them. At all
times, please observe anti-static precautions when handling the
board and always unpack and install it in an anti-static working
area.

Electromagnetic Compatibility (EMC)

The TARGET386EX is classified as a component with regard to the
European Community EMC regulations and it is the users
responsibility to ensure that systems using the board are compliant
with the appropriate EMC standards.

The STEbus variants of the TARGET386EX, when used in an Arcom
CRATE3CE enclosure, are CE approved under Arcoms STEbus
Technical Construction File.

Packaging

Please ensure that should a board need to be returned to Arcom, it
is adequately packed. Use an anti-static bag for the board and use a
box not bag to physically protect the board. Retain the original
packing if possible.

J539 TARGET386EX
2192-08270-000-000 Preface

Page 6

Section 1. Introduction

TARGET386EX is a Eurocard sized target CPU board developed
specifically for embedded applications offering the following
features:

 Intel 386EX microprocessor running at 33MHz
 STEbus 8-bit expansion interface
 PC/104 16-bit expansion interface
 256KB SRAM as standard, 512KB option available (16-bit wide

access)

 512KB Flash ROM on-board as standard (16-bit wide) with

resident monitor software

 16/32KB Dual Port RAM (DPR) between 386EX and STEbus (slave

mode only)
 Programmable memory and I/O maps
 Two 120KBaud (max.) RS232 serial communications ports

(National Semiconductor 16450 UART compatible)
 Programmable watchdog timer
 Flexible hardware interrupt support including STEbus interrupt

out facility
 Software development/download port (SVIF1 port)
 Two user links
 Two user LEDs and +5V power LED
 JTAG port supporting Flash ROM programming

The TARGET386EX is available as four variants:

This manual covers all four variants and indicates where a feature
does not apply to the Single Board Computer (SBC) variants.

The TARGET386EX is shipped with a software monitor blown into
the on-board Flash ROM to allow simple exercising of the board and
downloading of application code. The remote target portion of
Arcoms SourceVIEW development software is also blown into the
Flash ROM. By using the board with the TARGET386EX
Development Kit the user can develop and debug application
software very quickly.

2192-08270-000-000Section 1. Introduction

J539 TARGET386EX

Page 7

Variant Name

TARGET386EX

TARGET386EX-H

TARGET386EX-SBC

TARGET386EX-SBC-H

STEbus Master/Slave and PC/104 Master
256k SRAM

STEbus Master/Slave and PC/104 Master
512k SRAM

STEbus Master Single Board Computer
256k SRAM

STEbus Master Single Board Computer
512k SRAM

Specification

J539 TARGET386EX
2192-08270-000-000 Section 1. Introduction

Page 8

Section 2. Getting Started

This section is designed to familiarise the user with the features of
the TARGET386EX and demonstrate the use of the monitor
software.

Equipment required
For STEbus board variants (PL1 fitted)

 TARGET386EX SBC Development Kit
 STEbus rack and backplane with power supply
 IBM PC/AT compatible computer running terminal emulation

software

For SBC board variants (PL1 not fitted)

 TARGET386EX SBC Development Kit
 Power supply (+5V at 1A minimum) connected up to PL2 (see

Appendix B. Connections)
 IBM PC/AT compatible computer running terminal emulation

software

Installation & Monitor Startup

Refer to Target386EX Quickstart Manual for more comprehensive
instructions with drawings.

1.

Ensure that the links on the TARGET386EX board are in their
default configurations (see Section 3. Links and Options).

2.

From the TARGET386EX Development Kit take the CAB-SVIF1
cable and plug the 10 pin ribbon cable connector into the SVIF1 PL2
header.

3.

Plug PL1 of the SVIF1 into PL3 (software development/download
port) on the TARGET386EX. The body of the SVIF1 should lie over
the TARGET386EX.

4.

Ensure that Link 19 is fitted so monitor EPROM is activated

5.

For STEbus variants slide the TARGET386EX into the STEbus rack
until it mates with one of the backplane connectors.

OR

For SBC variants wire the +5V power supply cable to pin 2 of the
PL2 screw terminal block and the 0V cable to either pin 5 or pin 6 of
the terminal block.

6.

Plug the 9 pin D-type connector marked channel B on the CAB­SVIF1 cable into one of the COM ports on the PC/AT computer.

7.

Configure the terminal emulation software on the PC/AT for
communications via the same COM port as used in No. 6 above at 19200
Baud with 8 data bits, no parity and 1 stop bit. Set the protocol to 'none'.

2192-08270-000-000Section 2. Getting Started

J539 TARGET386EX

Page 9

8.

Turn on the STEbus rack or SBC power supply - the surface mount
power indicator LED on the TARGET386EX will illuminate.

9.

The terminal emulator will display the following (software version
may vary):

--==<< TARGMON TARGET MINI-MONITOR >>==-­Version 1.03

Copyright (C) Arcom Control Systems 1996

0100>

The monitor software is now running and can be used to exercise
many areas of the board. The monitor also supports code download
from a terminal emulator and Flash ROM programming. Press the
H key to display a command list. A full manual for operating the
monitor is shipped with the TARGET386EX. Section 4. Using the
TARGET386EX describes the operation of the board in more detail
and describes the tools available to develop applications code to run
on the board.

J539 TARGET386EX
2192-08270-000-000 Section 2. Getting Started

Page 10

Section 3. Links and Options

IMPORTANT NOTE:

STEbus variants of the TARGET386EX board are shipped in, and
power-up in, STEbus slave mode. This means that it cannot yet
access other STEbus peripheral boards. To access STEbus peripheral
boards via the monitor, links LK2 and LK3 should be fitted to drive
STEbus SYSRST* and SYSCLK* signals and General Control Register
1 (default I/O location FC06h) should be written with 07h. This sets
the board up as a default STEbus master with any memory or I/O
accesses not allocated to on-board memory or peripherals being
routed to the STEbus. See following sections and appendices for
more details of board set-up.

Default Link Positions

Note: A + next to a link position indicates the default shipping position.

LK1. STEbus timeout to TFRERR* [STEbus VARIANTS ONLY]

If an STEbus transfer initiated by the TARGET386EX is not
completed within a set time (see LK8) then a bus timeout will occur
to terminate the cycle. This may be used to generate an interrupt
(see LK15) and LK1 allows a timeout to assert the STEbus TFRERR*
signal to notify other boards in the system that there has been a
transfer problem. DO NOT FIT THIS LINK if there is an Arcom
SCIMX or SCIM386SXplus board in the system as these boards have
TFRERR* linked directly to their processor NMI line.

2192-08270-000-000Section 3. Links and Options

J539 TARGET386EX

Page 11

A B

LK18

LK16

LK12
LK13

LK11

LK7

LK19

LK17

LK15

LK14

LK10

A
B
C
D
E
F

LK5

LK6

LK4

A
B
C
D

LK1

A

LK2

B

LK3

LK8
A
B

2192-08270-000-000

LK2. STEbus SYSRST* [NOT SBC VARIANTS]

Note: Only one board in an STEbus system should drive SYSRST*

LK3. STEbus SYSCLK [NOT SBC VARIANTS]

Note: Only one board in an STEbus system should drive SYSCLK to the
STEbus backplane. This does not have to be the STEbus default master
board.

LK4 and LK5. STEbus Dual Port RAM (DPR) size links [NOT SBC
VARIANTS]

Note: DPR can only be accessed from the STEbus when the
TARGET386EX is in STEbus slave mode (see General Control Register 1).
These links define the size of the DPR for both on-board accesses and
STEbus accesses. In STEbus default or potential master mode, when the
DPR is not accessible from the STEbus, these links must still be set to define
the size of the DPR device for on-board accesses. See LK7 for DPR STEbus
base address selection

LK6. STEbus interrupt-out [NOT SBC VARIANTS]

See General Control Register 0 and Interrupt Assignments for
details.

J539 TARGET386EX

Section 3. Links and Options

Page 12

LK4 LK5 Function

Not valid configuration
32KB DPR
16KB DPR
Not valid configuration

Omit Omit

+Omit

Fit
Fit Fit

Omit

+Fit

LK6 Function

Interrupt-out asserts STEbus ATNRQ0*
Interrupt-out asserts STEbus ATNRQ1*
Interrupt-out asserts STEbus ATNRQ2*
Interrupt-out asserts STEbus ATNRQ3*

A

B
C

D

LK1 Function

Bus timeout does not assert TFRERR*
Bus timeout asserts TFRERR*

+Omit

Fit

LK2 Function

Board receives SYSRST* from backplane
Board drives SYSRST* to backplane

+A

B

LK3 Function

Board does not drive SYSCLK to STEbus backplane
Board drives SYSCLK to STEbus backplane

+Omit

Fit

LK7. STEbus DPR base address [NOT SBC VARIANTS]

Each position of LK7 corresponds to an STEbus address line. Fitting
a link will decode the address line logic low and omitting a link will
decode it logic high. LK7 has no effect if the board is in STEbus
default or potential master mode. See LK4 and LK5 for DPR size
selection. Default base address is D0000h with 32KB size selected.

LK8. STEbus timeout [NOT SBC VARIANTS]

LK9. Does not exist

LK10. INT0 interrupt source selection

LK11. INT1 interrupt source selection

LK12. INT2 interrupt source selection

LK13. INT3 interrupt source selection

2192-08270-000-000Section 3. Links and Options

J539 TARGET386EX

Page 13

LK7 Function

Decode STEbus A19
Decode STEbus A18
Decode STEbus A17
Decode STEbus A16
Decode STEbus A15
Decode STEbus A14 (for 32KB DPR size OMIT THIS LINK)

F

E

+D

C

+B

A

LK8 Function

4us bus timeout
8us bus timeout

A

+B

LK10 Function

STEbus ATNRQ0* [NOT SBC VARIANTS]
PC/104 IRQ10

A

+B

LK11 Function

STEbus ATNRQ1* [NOT SBC VARIANTS]
PC/104 IRQ11

A

+B

LK12 Function

STEbus ATNRQ2* [NOT SBC VARIANTS]
PC/104 IRQ12

A

+B

LK13 Function

STEbus ATNRQ3* [NOT SBC VARIANTS]
PC/104 IRQ14

A

+B

LK14. INT6 interrupt source selection

LK15. INT7 interrupt source selection

LK16. Watchdog reset enable

LK17. User link - CPU port P1 bit 6

LK18. User link - CPU port P1 bit 7

LK19. Run mode select

Selects whether the processor runs the monitor software or the users
application code after a power-on or reset. Application code must be
set to start running at 80000H (lowest Flash ROM memory address).
Once running, code may dynamically change the mapped size of the
Flash ROM (by re-programming 386EX chip select UCS) to free more
memory space for expansion bus memory mapped peripherals.

LK20. Battery back-up from PL2

FACTORY FIT LINK - default position depends on board variant

J539 TARGET386EX
2192-08270-000-000 Section 3. Links and Options

Page 14

LK18 Function

CPU port P1 bit 6 reads as 1
CPU port P1 bit 6 reads as 0

Omit

+Fit

LK19 Function

Run application starting at memory address 80000H
Run monitor software

Omit

+Fit

LK20 Function

STEbus variant - VSTBY from PL1
SBC variant - VSTBY from PL2 pin 1

Omit

Fit

LK14 Function

DPR mailbox interrupt [NOT SBC VARIANTS]
PC/104 IRQ6

A

+B

LK16 Function

Watchdog reset disabled
Watchdog timeout generates CPU reset

A

+B

LK17 Function

CPU port P1 bit 7 reads as 1
CPU port P1 bit 7 reads as 0

Omit

+Fit

LK15 Function

STEbus TFRERR*/bus timeout interrupt [NOT SBC VARIANTS]
PC/104 IRQ15

A

+B

LK21. ISP daisy-chain link

FACTORY FIT LINK - default position depends on board variant

This link is fitted on the SBC variant where IC10 is not fitted to allow
in-system programming of IC11 during factory test.

LK22. Processor speed

FACTORY FIT LINK

LK23 and LK24. IC21 Intel Flash compatibility

FACTORY FIT LINKS

LK23 and LK24 should be fitted if an Intel 28F400 Flash device is
fitted to the board. The default device is a Fujitsu 29F400TA.

2192-08270-000-000Section 3. Links and Options

J539 TARGET386EX

Page 15

LK21 Function

STEbus variant
SBC variant

Omit

+Fit

LK22 Function

CPU runs at 33MHz
CPU runs at 25MHz

+Omit

Fit

LK23 LK24 Function

Fujitsu device fitted
Intel device fitted

+Omit +Omit

Fit Fit

User Configuration Record

A B

LK18

LK16

LK12
LK13

LK11

LK7

LK19

LK17

LK15

LK14

LK10

A
B
C
D
E
F

LK5

LK6

LK4

A
B
C
D

LK1

A

LK2

B

LK3

LK8
A
B

2192-08270-000-000

J539 TARGET386EX

Section 3. Links and Options

Page 16