2192-09192-000-000 AIM104- RTC 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 1 CONTROL SYSTEMS 2192-09192-000-000 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) Page 2 CONTROL SYSTEMS J559 AIM104-RTC 2192-09192-000-000 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 register address must always be set prior to any access of the RTC. 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. Address Read/Write Information DO-D7 Base R/W Data Base+1 Write only Register Address Base+2 R/W Data Base+3 Write only Register Address The register map will be as follows : Register Location Function 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 REGISTER A BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 UIP DV2 DV1 DV0 RS3 RS2 RS0 RS0 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). Page 3 CONTROL SYSTEMS 2192-09192-000-000 J559 AIM104-RTC Select Bits In Register A Periodic Interrupt Rate RS3 RS2 RS1 RS0 0 0 0 0 None 0 0 0 1 3.90625ms 0 0 1 0 7.8125ms 0 0 1 1 122.070μs 0 1 0 0 244.141μs 0 1 0 1 488.281μs 0 1 1 0 976.5625μs 0 1 1 1 1.953125ms 1 0 0 0 3.90625ms 1 0 0 1 7.8125ms 1 0 1 0 15.625ms 1 0 1 1 31.25ms 1 1 0 0 62.5ms 1 1 0 1 125ms 1 1 1 0 250ms 1 1 1 1 500ms REGISTER B 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 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 J559 AIM104-RTC 2192-09192-000-000 REGISTER C BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 IRQF PF AF UF 0 0 0 0 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 register C clears AF. 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. REGISTER D BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 VRT 0 0 0 0 0 0 0 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 CONTROL SYSTEMS 2192-09192-000-000 J559 AIM104-RTC Links Throughout this section a �+� indicates a default link. AIM104-RTC Default Link Position [Address is 180h] User Configuration Record TP2 TP2 TP3 TP3 LK1 LK1 A2 A2 LK2 LK2 A3 A3 A4 A4 A5 A5 LK3 LK3 A6 A6 A7 A7 A8 A8 A9 A9 PL2 PL2 7 6 5 4 3 7 6 5 4 3 LK4 LK4 B1 B1 PL3 PL3 A1 A1 AIM104-RTC-HS Default Link Position [Address is 180h] User Configuration Record TP4 TP2 TP4 TP2 PL1 PL1 TP3 TP3 LK1 LK1 A2 A2 LK2 LK2 A3 A3 A4 A4 A5 A5 LK3 LK3 A6 A6 A7 A7 TP5 TP5 A8 A8 A9 A9 PL2 TP1 PL2 TP1 LK5 LK5 7 6 5 4 3 7 6 5 4 3 TP6 TP6 LK4 LK4 B1 B1 PL3 PL3 A1 A1 Page 6 CONTROL SYSTEMS J559 AIM104-RTC 2192-09192-000-000 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�. T Th he e d de ef fa au ul lt t a ad dd dr re es ss s i is s s se et t t to o 1 18 80 0h h Link Address Line + LK1H A9 LK1G A8 LK1F A7 + LK1E A6 + LK1D A5 + LK1C A4 + LK1B A3 + LK1A A2 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. +LK4E Timer Interrupt on IRQ3 LK4D Timer Interrupt on IRQ4 LK4C Timer Interrupt on IRQ5 LK4B Timer Interrupt on IRQ6 LK4A Timer Interrupt on IRQ7 Link 5 A AI IM M1 10 04 4- -R RT TC C LK5 A AI IM M1 10 04 4- -R RT TC C- -H HS S +LK5 (Factory fitted) L Li in nk k 6 6- -1 10 0 - - F Fa ac ct to or ry y F Fi it tt te ed d Page 7 CONTROL SYSTEMS 2192-09192-000-000 J559 AIM104-RTC 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 Page 8 CONTROL SYSTEMS J559 AIM104-RTC 2192-09192-000-000 Page 9 CONTROL SYSTEMS 2192-09192-000-000 J559 AIM104-RTC Revision History Manual PCB Comments Issue A V1 I3 960920 First full release of manual. (Aim104 Module Manual). Issue B V2 I2 961223 Edits to J538, J541, J559 & Aim104 Software Library. (Aim104 Module Manual). Issue C V2 I3 970604 [ECO 2494, 2502, 2516] (Aim Module Manual). Issue D V2 I3 980303 [ECO 2679] (Manual split up into Datasheets.) 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. Product Information Full information about other Arcom products is available via the F Fa ax x--o on n--D De em ma an nd d S Sy ys stte em m, (Telephone Numbers are listed below), or by contacting our W We eb bS Siit te e in the UK at: w ww ww w. .a ar rc co om m. .c co o. .u uk k , or in the US at: w ww ww w. .a ar rc co om mc co on nt tr ro olls s. .c co om m U Us se ef fu ul l C Co on nt ta ac ct t I In nf fo or rm ma at tiio on n C Cu us st to om me er r S Su up pp po or rt t S Sa alle es s 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: support@arcom.co.uk E-mail sales@arcom.co.uk or for the US E-mail icpsales@arcomcontrols.com U Un ni it te ed d K Ki in ng gd do om m U Un ni it te ed d S St ta at te es s F Fr ra an nc ce e G Ge er rm ma an ny y B Be el lg gi iu um m Arcom Control Systems Ltd Arcom Control Systems Inc Arcom Control Systems Kostenlose Infoline: Groen Nummer: Clifton Road 13510 South Oak Street Centre d�affaires SCALDY Tel: 0130 824 511 Tel: 0800 7 3192 Cambridge CB1 4WH, UK Kansas City MO 64145 USA 23 rue Colbert Fax: 0130 824 512 Fax: 0800 7 3191 Tel: 01223 411 200 Tel: 816 941 7025 7885 SAINT QUENTIN FoD: 0130 860 449 N Ne et th he er rl la an nd ds s Fax: 01223 410 457 Fax: 816 941 0343 Cedex, FRANCE FoD: 01223 240 600 FoD: 800 747 1097 Tel: 0800 90 84 06 I It ta al ly y Gratis 06 Nummer: Fax: 0800 90 84 12 NumeroVerde: Tel: 06022 11 36 FoD: 0800 90 23 80 FoD: 1678 73600 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. ' 1997 Arcom Control Systems Ltd Arcom Control Systems Ltd operate a company- Arcom Control Systems is a subsidiary of Fairey Group Plc. wide quality management system which has been Specifications are subject to change without notice and do not form part of any contract. certified by the British Standards Institution (BSI) All trademarks recognised. as compliant with ISO 9001:1994. Page 10 CONTROL SYSTEMS