Arcom AIM104-RTC Bedienungsanleitung

CONTROL SYSTEMS

AIM104- RTC

2192-09192-000-000

Page 1

Assembly Kit

Each AIM104 module is supplied with a mounting kit to secure the module.

Handling

All AIM104s contain 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 the board in an anti-static working area.

Software

A Utility Disk is supplied with your AIM104. It contains a host of software utilities designed

specifically for each AIM104. Please refer to the

README.TXT

file on the disk for further information.

It also includes a test program

EXAMP-01.EXE

which may be used to confirm access to the board. A

summary of the software drivers can be found in the AIM104-Software Library.

Introduction

The AIM104-RTC is available in two configurations:

AIM104-RTC Low Specification module - ±25ppm per year accuracy

AIM104-RTC-HS High Specification module - ±1ppm per year accuracy

The AIM104-RTC is an 8-bit PC/104 module providing real time clocking facilities. The module has

a self-contained sub-system of an on-board lithium energy source, quartz crystal and write-

protection support circuitry. The functions include a non-volatile time-of-day clock, an alarm, a one-

hundred year calendar and programmable interrupt. The module also has a site provided for a 3.7V

Lithium battery which may be used to provide other boards with battery backup.

The AIM104-RTC-HS is identical to the AIM104-RTC as far as software access is concerned. Both

boards have the same I/O map and register locations and perform all the same functions.

The HS variant provides time/date information to a higher degree of accuracy. To achieve such

accuracy it is necessary to use a TCXO (temperature compensated oscillator module). Such devices

draw a significant amount of current which means the AIM104-RTC-HS requires an external battery

to maintain the circuit in the absence of power.

Page 2

CONTROL SYSTEMS

General Features of the AIM104-RTC

 Counts seconds, minutes, hours, days, day of the week, date, month, and year with leap year

corrections

 Totally non-volatile with over 10 years of operation in the absence of power

 Accuracy of ±1 minute per month at 25°C, ±2 minutes per month at -10°C and ±3 minutes per

month at +65°C regardless of the PC/104 host supply voltage (different for the AIM014-RTC-HS)

 Three interrupt alarms

- Time of day alarm once/second to once/day

- Periodic rates from 122ms to 500ms

- End of the clock update cycle (i.e. every second)

 Link-selectable interrupt options (IRQ3,4,5,6,7)

 Board access LED (on all decoded addresses)

 8 bit PC/104 (IEEE996) bus interface

 Operating temperature of -10°C to 70°C (Storage temperature of -40°C to +70°C)

 Power Consumption from the PC/104 host 80mA @5v

 12 or 24 hour clock with AM and PM 12-hour mode

 MTBF: 1,476,985 hours (using generic figures from MIL-HDBK -217F at ground benign)

 3.7V 0.37Ah Lithium Battery (Optional on both variants)

Features - AIM104-RTC-HS

 Identical software functionality to the AIM104-RTC

 Battery Drain Current of 10mA typically in the absence of power

 Battery charging current of 80mA at a float voltage of 7.2 volt (suitable for a 6 volt lead acid

battery).

 Accuracy of ±1ppm per year (±30 secs per year)

 Operating Temperature of -10°C to 50°C

 Power Consumption from the PC/104 host 220mA (with lead acid battery) 90mA (without

battery) @ 5V

 MTBF: 863,844 hours (suing generic figures from MIL-HDBK-217F at ground benign)

2192-09192-000-000

CONTROL SYSTEMS

Page 3

2192-09192-000-000J559 AIM104-RTC

Operation

Control of the AIM104-RTC and AIM104-RTC-HS is achieved by writing a register address to location

base+1 and then accessing this register (either read or write) at the base address location. The

I/O Map

The board decodes 4 bytes of address space but only actually uses 2 bytes (base address, base+1)

to address the AIM104-RTC, with the following two bytes (base+2, base+3) being mirrored, as shown

below.

The register map will be as follows :

00 Seconds

01 Seconds Alarm

02 Minutes

03 Minutes Alarm

04 Hours

05 Hours Alarm

06 Day of the Week

07 Day of the Month

08 Month

09 Year

0A Register A

0B Register B

0C Register C

0D Register D

0E-7F User RAM

UIP - Update In Progress

Used to indicate when an update cycle will occur

DV2-DV0

A pattern of 010 will turn the internal oscillator on. The AIM104-RTC needs this start code upon

installation only.

RS3-RS0

Rate selection bits

Used to select the rate of the periodic interrupt when used (see figure).

Address

Base

Base+1

Base+2

Base+3

R/W

Write only

R/W

Write only

Data

Read/Write Information DO-D7

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

UIP DV2 DV1 DV0 RS3 RS2 RS0 RS0

SET

When set to a one the update transfer functions is inhibited and the time and calendar bytes can be

read or initialised without an update cycle occurring.

PIE - Periodic Interrupt enable

A read/write bit which allows the periodic interrupt flag (PF) in register C to drive the IRQx line high.

AIE - Alarm Interrupt Enable

A read/write bit which allows the alarm interrupt flag (AF) in register C to drive the IRQx line high.

UIE - Update Ended Interrupt Enable

A read/write bit which permits the Alarm flag (AF) in register C to drive the IRQx line high. A SET bit

going high clears UIE.

DM - Data Mode

Set to 1 for a binary data format, while a zero specifies BCD.

24/_12 - 24/12 hour format

A one specifies a 24-hour mode. A zero indicates a 12 hour mode.

Page 4

CONTROL SYSTEMS

2192-09192-000-000 J559 AIM104-RTC

Select Bits In Register A

RS3

0 0

None

3.90625ms

7.8125ms

122.070µs

244.141µs

488.281µs

976.5625µs

1.953125ms

3.90625ms

7.8125ms

15.625ms

31.25ms

62.5ms

125ms

250ms

500ms

RS2 RS1 RS0

Periodic Interrupt Rate

BIT 7 BIT6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

SET PIE AIE UIE N/A DM 24/_12 N/A

IRQF - Interrupt request flag

Set to a one if the following is true

IRQF = PF.PIE + AF.AIE + UF.UIE

PF - Periodic interrupt flag (Read Only)

Set to a one when an edge is detected on the selected leg of the internal divider chain. RS3-RS0

establish the periodic rate. PF is cleared by a software read of Register C.

AF - Alarm interrupt flag

When set to a one indicates that the present time matches the alarm time. A software read of

UF - Update Ended interrupt flag

Set to one after each update cycle. The update cycle occurs every second as the internal time

registers are passed to the user copy. UF is cleared by a read of register C.

VRT - Valid RAM and Time

If zero then an exhausted internal lithium energy source is indicated and the contents of the RTC

data is questionable.

Page 5

2192-09192-000-000J559 AIM104-RTC

CONTROL SYSTEMS

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

VRT 0 0 0 0 0 0 0

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

IRQF PF AF UF 0 0 0 0

2192-09192-000-000

Page 6

J559 AIM104-RTC

CONTROL SYSTEMS

Links

Throughout this section a + indicates a default link.

AIM104-RTC

Default Link Position [Address is 180h] User Configuration Record

AIM104-RTC-HS

Default Link Position [Address is 180h] User Configuration Record

TP2

PL2

7 56 4 3

LK1

LK2

LK3

LK4

PL3

TP3

TP2

PL2

7 56 4 3

LK1

LK2

LK3

LK4

PL3

TP3

PL3

PL2

TP4

TP5 TP1

TP3

TP6

TP2

PL1

LK4

LK1

LK2

LK3

LK5

7 3456

PL3

PL2

TP4

TP5 TP1

TP3

TP6

TP2

PL1

LK4

LK1

LK2

LK3

LK5

7 3456

CONTROL SYSTEMS

Page 7

2192-09192-000-000J559 AIM104-RTC

Base Address Select

Links LK1A-H

The base address of the AIM104-RTC is set using the link area shown below:

Note: When a link is fitted the address line is decoded as a 0 and when a link is omitted the address

is decoded as a 1.

TThhee

ddeeffaauulltt

aaddddrreessss

iiss

sseett

ttoo

118800hh

Interrupts Select

Links 2 and 3

The AIM104-RTC 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 P996 bus operation.

P996 operation - LK2 Open +

- LK3 Open +

Interrupt Sharing - LK2 Made

- LK3 Made

Important: 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) pulldown resistor (1 K ohms) connected between the IRQ

line and ground. To do this on the AIM104-RTC link 3 should be inserted.

Link 4

Link 4 determines which PC/104 IRQx line the AIM104-RTC interrupt will be generated upon. The

default interrupt line is IRQ4.

Link 5

AAIIMM110044--RRTTCC

AAIIMM110044--RRTTCC--HHSS

(Factory fitted)

LLiinnkk

66--1100

FFaaccttoorryy

FFiitttteedd

Link

+ LK1H A9

LK1G

LK1F

+ LK1E

+ LK1D

+ LK1C

+ LK1B

+ LK1A

Address Line

+LK4E

LK4D

LK4C

LK4B

LK4A

Timer Interrupt on IRQ3

Timer Interrupt on IRQ4

Timer Interrupt on IRQ5

Timer Interrupt on IRQ6

Timer Interrupt on IRQ7

LK5

+LK5

2192-09192-000-000

Page 8

J559 AIM104-RTC

CONTROL SYSTEMS

Battery Back-Up for the AIM104-RTC-HS

The AIM104-RTC-HS requires an external battery supply to maintain the oscillator circuit in the

absence of power from the PC/104 host. The board provides a constant current, constant float

voltage charging circuit suitable for a 6 volt lead acid battery which is connected to the board via the

2-way screw terminal PL1.

When +5V is supplied to the AIM104-RTC-HS from the PC/104 host, the lead acid battery is charged

by a current of approximately 80mA and a float voltage of 7.2 volts.

The choice of capacity for the lead acid battery depends on the period of battery back-up required

by the application. The battery drain current required by the AIM104-RTC-HS board in the absence of

power (approximately 10mA) will determine the length of battery back-up provided by that battery,

and the battery charge current supplied by the AIM104-RTC-HS when power is present

(approximately 80mA) will determine how long it will take to recharge. For example a 3.5AH battery

would charge fully in 350 hours and would recharge in 44 hours.

Arcom recommend that the AIM104-RTC-HS is used with a 6 volt 3.5 Ah lead acid battery for most

typical applications.

NB: Charging characteristics may depend on the individual battery. Please consult the battery

supplier for exact details.

Millennium Compliance

The AIM104-RTC board is fitted with a Real-time-clock (RTC) which only provides the last 2 digits of

the year (i.e. for 1997, will produce 97). Therefore it is the programmers responsibility to ensure that

application code correctly interprets and appends (if required) the first digits of the year. Care must

be taken when dealing with the transition to the year 2000.

Please contact Arcom Technical Support [+44 (0)1223 412 428] or visit our web site if you have any

questions.

www.arcom.co.uk

CONTROL SYSTEMS

Page 9

2192-09192-000-000J559 AIM104-RTC

2192-09192-000-000

Page 10

J559 AIM104-RTC

CONTROL SYSTEMS

Product Information

Full information about other Arcom products is available via the FFaaxx--oonn--DDeemmaanndd

SSyysstteemm, (Telephone

Numbers are listed below), or by contacting our WWeebbSSiitteein the UK at: wwwwww..aarrccoomm..ccoo..uukk, or in the US

at: wwwwww..aarrccoommccoonnttrroollss..ccoomm

UUsseeffuull

CCoonnttaacctt

IInnffoorrmmaattiioonn

CCuussttoommeerr

SSuuppppoorrtt

SSaalleess

Tel: +44 (0)1223 412 428 Tel: +44 (0)1223 411 200

Fax: +44 (0)1223 403 400 Fax: +44 (0)1223 410 457

E-mail: [email protected].uk E-mail sales@arcom.co.uk or for the US

E-mail [email protected]

UUnniitteedd

KKiinnggddoomm

Arcom Control Systems Ltd

Clifton Road

Cambridge CB1 4WH, UK

Tel: 01223 411 200

Fax: 01223 410 457

FoD: 01223 240 600

UUnniitteedd

SSttaatteess

Arcom Control Systems Inc

13510 South Oak Street

Kansas City MO 64145 USA

Tel: 816 941 7025

Fax: 816 941 0343

FoD: 800 747 1097

FFrraannccee

Arcom Control Systems

Centre daffaires SCALDY

23 rue Colbert

7885 SAINT QUENTIN

Cedex, FRANCE

Tel: 0800 90 84 06

Fax: 0800 90 84 12

FoD: 0800 90 23 80

GGeerrmmaannyy

Kostenlose Infoline:

Tel: 0130 824 511

Fax: 0130 824 512

FoD: 0130 860 449

IIttaallyy

NumeroVerde:

FoD: 1678 73600

BBeellggiiuumm

Groen Nummer:

Tel: 0800 7 3192

Fax: 0800 7 3191

NNeetthheerrllaannddss

Gratis 06 Nummer:

Tel: 06022 11 36

Fax: 06022 11 48

The choice of boards or 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.

Arcom Control Systems is a subsidiary of Fairey Group Plc.

Specifications are subject to change without notice and do not form part of any contract.

All trademarks recognised.

Arcom Control Systems Ltd operate a company-

wide quality management system which has been

certified by the British Standards Institution (BSI)

as compliant with ISO 9001:1994.

Revision History

Manual

Issue A

Issue B

Issue C

Issue D

V1 I3

V2 I2

V2 I3

960920 First full release of manual. (Aim104 Module

Manual).

961223 Edits to J538, J541, J559 & Aim104 Software Library.

(Aim104 Module Manual).

970604 [ECO 2494, 2502, 2516] (Aim Module Manual).

980303 [ECO 2679] (Manual split up into Datasheets.)

PCB Comments

NOTE: 960920- The Arcom Aim104 Modules were all put together in one manual (2192-08164-000-000),

then updated to Issues B and C (2192-08240-000-000 & 2192-08521-000-000). During the lifetime of Issue

C it was decided that the Aim Module Maual should be split into separate Datasheets [ECO 2679].

Hence, the Revision History for Issues A, B & C of the manual refer to the Aim Module Manual as was.

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