Eurotech AIM104-SER4 Owner's manual

Brand: Eurotech

Model: AIM104-SER4

Type: Owner's manual

AIM104-SER4

4 Channel RS232

PC/104 Board

Technical Manual

AIM104-SER4 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 I2 September 20

, 1996 First full release of manual.

Issue B V1 I2 December 23

, 1996 Edits to J538, J541, J559, and AIM104 software.

Issue C V1 I2 June 4

, 1997 [ECO 2494, 2502, 2516]

Issue D V1 I3 March 3

, 1998 [ECO 2679] manual split up into datasheets.

Issue E V1 I3 January 22

, 2008 Minor updates and reformatting.

For contact details, see page

16.

AIM104-SER4 Technical Manual Contents

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

Operation...........................................................................................................................................8

I/O map..............................................................................................................................................9

Programming the SCC.....................................................................................................................10

Links.................................................................................................................................................11

LK1- Address selection........................................................................................................11

LK2 and 3 - Interrupt selection.............................................................................................12

LK4 - IRQ selection..............................................................................................................12

LK5 and 6 - Synchronous clock selection...........................................................................13

Output connector (PL1) pin assignments.........................................................................................15

Appendix A – Contacting Eurotech Ltd ............................................................................................16

Appendix B – EMC considerations ..................................................................................................17

Index................................................................................................................................................18

AIM104-SER4 Technical Manual Introduction

Introduction

The AIM104-SER4 is an 8-bit PC/104 module providing four channels of RS232 Serial

Comms. It is based on the 85230 Enhanced Serial Communications Controller and is

capable of RS232 signaling standards. Every channel can be independently configured

for asynchronous and synchronous protocols, baud rate and signaling standard. High

speed communications can be achieved up to 57.6kBaud (asynchronous) or 921kBaud

(synchronously).

Features

• Four serial channels.

• Powerful and versatile 85230 Enhanced Serial Communications Controller.

• Link-selectable interrupts (IRQ 3, 4, 5, 6, 7, 9, 10, 11, 15).

• 8/16-bit PC104 interface (can be used in 8-bit stack if IRQ 10, 11 and 15 are not

used).

• Eurotech Ltd standard 50-way ribbon cable connection.

• Module access LED (on all decoded addresses).

• Operating temperature range, -20°C to +70°C.

• Power consumption from the host, max150mA at +5V, 50mA at +12V, 100mA at -

12V (note, this board requires +/- 12V).

• MTBF: 235,000 hours (using generic figures from MIL-HDBK-2217F at ground

benign).

AIM104-SER4 Technical Manual Introduction

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-SER4 is classified as a component with regards 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-SER4 includes additional filter components on-board to minimise the

emissions of high frequency noise. Because of this, the earth tab supplied with the

module must be connected to the chassis of the system by a good earth wire.

If the electronic system requires input protection against high voltage transients (to

meet CE requirements), it is recommended that an external interface board is located

at the point where the external wiring enters the electronic system enclosure:

Packaging

Should a board need to be returned to Eurotech Ltd, please ensure that it is

adequately packed, preferably in the original packing material.

AIM104-SER4 Technical Manual About this manual

About this manual

This manual describes the operation and use of the AIM104-SER4 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.

AIM104-SER4 Technical Manual What items are provided?

What items are provided?

The AIM104-SER4 is supplied with the following items:

• The AIM104-SER4 board.

• Mounting kit.

Getting started

Unpacking and connecting up

To begin using the AIM104-SER4 board, follow these steps:

1 Power down your computer.

2 Install the board in a spare PC104 slot.

3 Power up your computer and install the appropriate driver.

AIM104-SER4 Technical Manual Operation

Operation

The module occupies 16 bytes in the I/O address space. Only the first 9 locations are

used.

Accessing registers

The 85230 devices have 0 - 15 write/read registers. To access these registers, except

WR0 and RR0, it is necessary to perform either two write operations or a write followed

by a read operation. The first write operation is to the control register for the required

channel and the data is the register number that is to be accessed. The following

operation then accesses that register of the SCC device. This scheme is only used for

initialisation and some status data. Data used as serial data is sent directly to the data

For example if you wish to access WR1 of chan 1. Write to address base +2 the byte

01. This allows access to WR1 of chan1. It is now possible to access this register by

writing to address base +2 with the required data.

To access WR0 or RR0 it is only necessary to write/read the required status/control

Interrupt acknowledge

An interrupt acknowledge is generated by reading address base +8. The device that

has generated the interrupt then places an interrupt vector onto the data bus. This

vector is written into WR2 during initialisation and may be read from RR2 if required.

AIM104-SER4 Technical Manual I/O map

I/O map

Address Register name Read/write

Base Channel 0 status Read

Base Channel 0 control Write

Base +1 Channel 0 data Read/write

Base +2 Channel 1 status Read

Base +2 Channel 1 control Write

Base +3 Channel 1 data Read/write

Base +4 Channel 2 status Read

Base +4 Channel 2 control Write

Base +5 Channel 2 data Read/write

Base +6 Channel 3 status Read

Base +6 Channel 3 control Write

Base +7 Channel 3 data Read/write

Base +8 Interrupt acknowledge Read

AIM104-SER4 Technical Manual Programming the SCC

Programming the SCC

The SCC is a versatile and powerful device and as such requires careful initialisation.

For this reason, it is strongly recommended that the SCC manufacturer’s manual is

used. This is available from Eurotech Ltd Technical support or via the Zilog Website

(

www.zilog.com). Alternatively, it is available from any Zilog distributor. It should be

noted that it is not software-compatible with the PC 8250-type UART.

The order in which registers are initialised is important and a register may

need to be accessed more than once during initialisation. For examples of

basic SCC initialisation, please refer to the source code of the programs on

the utility disk.

Each SCC occupies four I/O locations in the AIM104-SER4 I/O map; two consecutive

locations per channel. The lower address of each pair is the control and status register,

which is also multiplexed with the control/status pointer register; the higher address of

each pair contains data transmit and receive latches.

The SCC itself has an indexed register scheme for the status and control registers, but

not for the serial data registers themselves. The important difference here is that

because the register pointer latch occupies the same I/O location as the control and

status registers themselves, the pointer latch always has to be written before each

be read without having to write 0 first.

Baud rates

The SCC has one 16-bit baud rate counter per channel for both receive and transmit,

so both run at the same baud rate. In asynchronous mode, the clock must be used in a

x16 mode , so the baud rate calculation is:

time constant = -2

Typical baud rates and their time constants are:

Typical baud rates

The 16-bit counter is set up by writing the lower byte of the time constant to SCC

all have time constants of less than 256, so their upper bytes are all zero.

Baud Time constant

57600 0

38400 1

19200 4

9600 10

115200

baud rate

AIM104-SER4 Technical Manual Links

Links

The following diagrams illustrate the default link positions:

LK1- Address selection

The base address of the module is set using LK1; inserting a jumper selects 0.

AIM104-SER4 Technical Manual Links

LK2 and 3 - Interrupt selection

Used to select the interrupt options:

Link Function

LK2 Fitted on one device per IRQ

LK3 Fitted for interrupt sharing

Not fitted for IEEE996 option

For standard PC operation, each IRQ line must be assigned to a different

module, and both LK2 and LK3 should be removed.

The AIM104-SER4 is compatible with the PC/104 interrupt sharing option so that

multiple interrupting devices can share a single bus interrupt line. By setting links 2 and

3 appropriately the module can be configured for shared interrupt line operation or

normal P966 bus operation.

P966 operation: - LK2 Open +

- LK3 Open +

Interrupt sharing: - LK2 Made

All PC/104 devices sharing a common interrupt must be equipped with a suitable

interrupt sharing circuit. If an interrupt line is to be shared by two or more devices then

the line being shared must have one (and only one) pull down resistor (1K ohms)

connected between the IRQ line and ground. To do this on the AIM104-SER4 link 3

should be inserted.

LK4 - IRQ selection

Used to select the IRQ options:

Link Function

LK4A Interrupt connected to IRQ3

LK4B Interrupt connected to IRQ4

LK4C Interrupt connected to IRQ5

LK4D Interrupt connected to IRQ6

LK4E Interrupt connected to IRQ7

AIM104-SER4 Technical Manual Links

Link Function

LK4F Interrupt connected to IRQ9

LK4G Interrupt connected to IRQ10

LK4H Interrupt connected to IRQ11

LK4I Interrupt connected to IRQ15

If there is no jumper fitted the module does not generate an interrupt.

Positions G, H and I can only be used if the AIM104-SER4 is mounted in a 16-

bit stack.

LK5 and 6 - Synchronous clock selection

Used to select the synchronous clock options:

LK5

Channel 2 and 3 options:

Link Function

LK5A Channel 3 option - TRxC

LK5B Channel 3 option - RTxC

LK5C Channel 3 option - SYNC

LK5D Channel 2 option - TRxC

LK5E Channel 2 option - RTxC

LK5F Channel 2 option - SYNC

LK6

Channel 0 and 1 options:

Link Function

LK6A Channel 1 option - TRxC

LK6B Channel 1 option - RTxC

LK6C Channel 1 option - SYNC

AIM104-SER4 Technical Manual Links

Link Function

LK6D Channel 0 option - TRxC

LK6E Channel 0 option - RTxC

LK6F Channel 0 option - SYNC

Only one jumper should be inserted into A, B or C and D, E or F.

AIM104-SER4 Technical Manual Output connector (PL1) pin assignments

Output connector (PL1) pin assignments

The pin-out conforms to the Eurotech Ltd Signal Conditioning System SCS and may be

connected directly to a range of D connector breakout panels. This range of products

also includes options to convert from RS-232 to RS-422 and RS-485 for long distance

communications and also opto-isolation to eliminate the effects of ground loop.

Pin no. Function Pin no. Function

1 Filtered ground 2 Filtered ground

3 No connection 4 Chan 0 TxD

5 (Chan 0 RTxC) 6 Chan 0 RxD

7 Chan 0 RTS 8 Chan 0 CTS

9 Chan 0 DTR 10 Chan 0 DCD

11 Filtered ground 12 (Chan 0 option)

13 No connection 14 Chan 1 TxD

15 (Chan 0 RTxC) 16 Chan 1 RxD

17 Chan 1 RTS 18 Chan 1 CTS

19 Chan 1 DTR 20 Chan 1 DCD

21 Filtered ground 22 (Chan 1 option)

23 No connection 24 Chan 2 TxD

25 (Chan 0 RTxC) 26 Chan 2 RxD

27 Chan 2 RTS 28 Chan 2 CTS

29 Chan 2 DTR 30 Chan 2 DCD

31 Filtered ground 32 (Chan 2 option)

33 No connection 34 Chan 3 TxD

35 (Chan 0 RTxC) 36 Chan 3 RxD

37 Chan 3 RTS 38 Chan 3 CTS

39 Chan 3 DTR 40 Chan 3 DCD

41 Filtered ground 42 (Channel 3 option)

43 No connection 44 No connection

45 No connection 46 No connection

47 No connection 48 Filtered +12V

49 Filtered +5V 50 Filtered +5V

Signals shown in brackets are TTL level signals. For Chan 0-3 option see LK5 and 6.

AIM104-SER4 Technical Manual Appendix A – Contacting Eurotech Ltd

Appendix A – Contacting Eurotech Ltd

Eurotech Ltd sales

Eurotech Ltd’s sales team is always available to assist you in choosing the board that

best meets your requirements.

Eurotech Ltd

3 Clifton Court

Cambridge

CB1 7BN

Tel: +44 (0)1223 403410

Fax: +44 (0)1223 410457

Email:

[email protected]

Comprehensive information about our products is also available at our web site:

www.eurotech-ltd.co.uk.

While Eurotech Ltd’s sales team can assist you in making your decision, the

final choice of boards or systems is solely and wholly the responsibility of the

buyer. Eurotech Ltd’s entire liability in respect of the boards or systems is as set

out in Eurotech Ltd’s standard terms and conditions of sale. If you intend to

write your own low level software, you can start with the source code on the

disk supplied. This is example code only to illustrate use on Eurotech Ltd’s

products. It has not been commercially tested. No warranty is made in respect

of this code and Eurotech Ltd shall incur no liability whatsoever or howsoever

arising from any use made of the code.

Eurotech Ltd technical support

Eurotech Ltd has a team of dedicated technical support engineers available to provide

a quick response to your technical queries.

Tel: +44 (0)1223 412428

Fax: +44 (0)1223 410457

Email:

[email protected]

Eurotech Group

Eurotech Ltd is a subsidiary of Eurotech Group. For further details see

www.eurotech.com

AIM104-SER4 Technical Manual Appendix B – EMC considerations

Appendix B – EMC considerations

The AIM104-SER4 includes additional filter components on board to minimise the

emissions of high frequency noise via the RS-232 interface devices. The filter requires

that the earth tab supplied with the module is connected via a good electrical

connection to the chassis of the system.

If the electronic system requires input protection against high voltage transients (to

meet CE requirements) it is recommended that an external interface board is located at

the point where the external wiring enters the electronic system enclosure.

AIM104-SER4 Technical Manual Index

Index

accessing registers · 8

anti-static · 5

baud rates · 10

board · 5, 7

circuit diagrams · 18

connecting up · 7

connector pin assignments · 15

contact details · 16

earth wire · 5

electromagnetic compatibility · See EMC

EMC · 5

EMC considerations · 17

external interface board · 5

features · 4

handling · 5

high voltage transients · 5

I/O map · 9

inputs

connector pin assignments · 15

interrupt knowledge · 8

LK1 · 11

LK5 · 13

mounting kit · 7

noise emissions · 5

operation · 8

opto-isolation · 5

PL1 · 15

safety · 5

SCC · 10

selection

synchronous · 12, 13

source code · 16

static · 5

storage · 5

support, technical · 16

symbols · 6

technical support · 16

trademarks · 2

voltage

high voltage transients · 5

Eurotech AIM104-SER4 Owner's manual

Eurotech AIM104-SER4 Owner's manual

Eurotech AIM104-SER4 Owner's manual

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