Eurotech AIM104-COM8 Manual de usuario
AIM104-COM8
8 Channel RS232
PC/104 Board
Technical Manual
AIM104-COM8 Technical Manual
ISO 9001
FM12961
Disclaimer
The information in this manual has been carefully checked and is believed to be accurate. Eurotech Ltd assumes no
responsibility for any infringements of patents or other rights of third parties, which may result from its use.
Eurotech Ltd assumes no responsibility for any inaccuracies that may be contained in this document. Eurotech Ltd makes
no commitment to update or keep current the information contained in this manual.
Eurotech Ltd reserves the right to make improvements to this document and/or product at any time and without notice.
Warranty
This product is supplied with a 3 year limited warranty. The product warranty covers failure of any Eurotech Ltd manufactured
product caused by manufacturing defects. The warranty on all third party manufactured products utilised by Eurotech Ltd is
limited to 1 year. Eurotech Ltd will make all reasonable effort to repair the product or replace it with an identical variant.
Eurotech Ltd reserves the right to replace the returned product with an alternative variant or an equivalent fit, form and
functional product. Delivery charges will apply to all returned products. Please check www.eurotech-ltd.co.uk for information
about Product Return Forms.
Trademarks
Windows NT, Windows 2000 and Windows XP are registered trademarks of the Microsoft Corporation.
All other trademarks recognised.
Revision History
Manual PCB Date Comments
Issue A V1.1 September 29th, 2004 First full release of manual.
Issue B V1.1 September 25th, 2006 Minor modifications.
Issue cV1.1 December 21st, 2007 Minor updates, Eurotech rebranding.
© 2007 Eurotech Ltd.
For contact details, see page 18.
AIM104-COM8 Technical Manual Contents
© 2007 Eurotech Ltd Issue C 3
Contents
Introduction........................................................................................................................................4
Handling your board safely....................................................................................................5
About this manual..............................................................................................................................6
Conventions...........................................................................................................................6
What items are provided?..................................................................................................................7
Getting started ...................................................................................................................................7
Unpacking and connecting up................................................................................................7
Description.........................................................................................................................................8
I/O map..............................................................................................................................................9
UART structure....................................................................................................................10
Interrupts..........................................................................................................................................11
Jumpers...........................................................................................................................................12
Default settings....................................................................................................................12
Cable connections ...........................................................................................................................17
Appendix A – Contacting Eurotech Ltd ............................................................................................18
Appendix B – Connector details.......................................................................................................19
Appendix C – Notes on using the 16C550 UART............................................................................21
Appendix D – RoHS-6 Compliance - Materials Declaration Form...................................................23
Index................................................................................................................................................24
AIM104-COM8 Technical Manual Introduction
© 2007 Eurotech Ltd Issue C 4
Introduction
The AIM104-COM8 is an 8-bit or 16-bit PC/104 module that provides up to eight
RS232 asynchronous communications channels.
Variants There is only one standard variant of the this board:
• AIM104-COM8: Eight channel RS232 PC/104 board.
A four channel version of the board may also be available for volume orders.
Please contact the Eurotech Ltd sales team for information on this variant.
Features
• Eight 16C550 compatible UART channels.
• Transfer rates up to 115.2Kbaud supported.
• +5V only operation.
• All channels can appear as a block anywhere in I/O address range 000-3FFh.
• First four channels can be individually set as standard PC/AT COM1-4.
• Each QUART (Quad-UART) can drive one link-selectable IRQ in the range 3, 4,
5, 7, 9, 10, 11, 12, 14, 15.
• The two QUART interrupts can be combined to drive one IRQ.
• PC/104 16 bit interface (but can be used in 8-bit slot if IRQ10, 11 and 15 are not
required).
• Zero wait state bus operation capability.
• Board access LED.
• Interrupt activity LED.
• TxD/RxD activity indicator LEDs on all channels.
• Power requirements: 220 mA (typical) at +5V DC.
• Temperature range: -20°C (-4°F) to +70°C (158°F) operating.
-40°C (-40°F) to +125°C (125°F) storage.
AIM104-COM8 Technical Manual Introduction
© 2007 Eurotech Ltd Issue C 5
Handling your board safely
Anti-static handling
This board contains CMOS devices. These could be damaged in the event of static
electricity being discharged through them. Observe anti-static precautions at all times
when handling circuit boards. This includes storing boards in appropriate anti-static
packaging and wearing a wrist strap when handling them.
Electromagnetic compatibility (EMC)
The AIM104-COM8 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 AIM104-COM8 has been designed to minimise noise emissions generated by the
high frequency host PC/104 system. It includes filter components on all serial I/O lines.
It is possible to capacitively couple the board ground to the chassis using metal pillars
and fastenings at the mounting hole marked ‘CHASSIS’. This is shown in the following
diagram:
Packaging Should a board need to be returned to Eurotech Ltd, please ensure that it is
adequately packed, preferably in the original packing material.
RoHS compliance
The European RoHS Directive (Restriction on the Use of Certain Hazardous
Substances – Directive 2002/95/EC) limits the amount of six specific substances within
the composition of the product. TheAIM104-COM8 is available as an RoHS-6
compliant option and is identified by an -R6 suffix in the product order code.A full
RoHS Compliance Materials Declaration Form is included in Appendix D – RoHS-6
Compliance - Materials Declaration Form, page 23. Further information about RoHS
compliance is available on the Eurotech Ltd web site: www.eurotech-ltd.co.uk
AIM104-COM8 Technical Manual About this manual
© 2007 Eurotech Ltd Issue C 6
About this manual
This manual describes the operation and use of the AIM104-COM8 PC/104 module.
It is both a reference and user manual and includes information about all aspects of the
module.
Conventions
Symbols
The following symbols are used in this guide:
Symbol Explanation
Note - information that requires your attention.
Tip - a handy hint that may provide a useful alternative or save
time.
Caution – proceeding with a course of action may damage
your equipment or result in loss of data.
Terminology
To prevent confusion with the standard PC AT nomenclature of COM1-4, this manual
refers to the channels on the AIM104-COM8 as 0-7. Where this manual specifies
COM1-4, this refers to the standard PCAT communications ports.
AIM104-COM8 Technical Manual What items are provided?
© 2007 Eurotech Ltd Issue C 7
What items are provided?
The AIM104-COM8 is supplied with the following items:
• The AIM104-COM8 board.
• Mounting kit.
Getting started
Unpacking and connecting up
To begin using the AIM104-COM8 board, follow these steps:
1Power down your computer.
2Install the board in a spare PCI slot.
3Power up your computer and install the appropriate driver available from our
website www.eurotech-ltd.co.uk/en/downloads.
AIM104-COM8 Technical Manual Description
© 2007 Eurotech Ltd Issue C 8
Description
The AIM104-COM8 uses two 16C550 type Quad-UART chips to provide eight standard
PC AT type serial channels which are supported by a wide range of third party software
and standard operating systems.
All channels are buffered to RS232 levels, supporting all the signals found on a PCAT
type 9-pin RS232 port.
The simplest I/O address mapping has the eight serial channels appearing as eight
bytes each, next to each other, based at any 16-byte boundary in the I/O map from
000-3FFh.
Channels 0-3 can be individually relocated at standard PCAT communications channel
addresses for COM1-4 respectively. See JP3 - Channel re-mapping to COM
addresses, page 15, for further details about address mapping.
Each QUART has its own interrupt line that can be linked to any of the following
PC/104 interrupts: IRQ3-5, 7, 9-12, 14-15.
The interrupt lines from the second QUART chips can be merged with the first to drive
a single IRQ line.
The AIM104-COM8 has a 16 bit PC/104 connector but utilises only interrupt lines
IRQ10, 11 12, 14 and 15 on the J5 connector. This means that the board can also be
used in an 8 bit PC/104 slot providing these interrupt lines are not required.
A further link on the AIM104-COM8 allows zero wait state operation of the PC/104 bus.
(This is dependant on the PC/104 CPU board supporting this option.)
AIM104-COM8 Technical Manual I/O map
© 2007 Eurotech Ltd Issue C 9
I/O map
The I/O mapping allows a flexible configuration to be achieved. At its simplest, the
UART’s appear as an array of eight contiguous ports with eight bytes for each UART.
The base address can be set at any 16-byte boundary.
Channels 0-3 can also be individually relocated at standard PC/AT communications
channel addresses for COM1-4 respectively. As this is done, these channels ‘disappear’
from the group until only the last four remain. When that happens, the board logic
knows that it has only 32 bytes in the group and so decodes those channels as a 32-
byte block.
Group addressed map
000
...
base address
PC COM port locations
+00 Channel 0
000
... +08 Channel 1
02E8-2EF COM4 +10 Channel 2
+18 Channel 3
02F8-2FF COM2 +20 Channel 4
+28 Channel 5
03E8-3EF COM3 +30 Channel 6
+38 Channel 7
03F8-3FF COM1
AIM104-COM8 Technical Manual I/O map
© 2007 Eurotech Ltd Issue C 10
UART structure
Each channel occupies 8 bytes of I/O space with the following registers defined:
Offset Register Read Write
+0 RHR/THR Receive Holding Register Transmit Holding
Register
+1 IER Interrupt Enable Register
+2 ISR/FCR Interrupt Status Register FIFO Control Register
+3 LCR Line Control Register
+4 MCR Modem Control Register
+5 LSR Line Status Register
+6 MSR Modem Status Register
+7 SCR Scratchpad Register
General
Register Set
(DLAB [ICR:7] set)
+0 DLL LSB of Divisor Latch
+1 DLM MSB of Divisor Latch.
Baud Rate Register
(DLAB [ICR:7] clear)
If you are planning to write your own low level software for theAIM104-COM8, refer to
the datasheet for the Exar ST16C554 device. This is available to download from
www.exar.com.
You can also download some example C source code from www.eurotech-ltd.co.uk.
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