5554 Quad Serial - Octagon Systems
Contents
1. 17 Programming Example 18 CHAPTER 4 TECHNICAL DATA 21 Technical Spedi fil ea ti n 5 n 3 eret Ug eis 21 Jumper S GELI miim reti 22 Connector PI OU LS uiia ci cniin tener eee dr ni b n odd 24 PC Bus PIHlQouts ee niim diet e REO 25 WARRANTY PREFACE This manual is a guide to the proper configuration installation and operation of your 5554 5558 Quad Octal Serial Card The 5554 5558 expansion card is part of the Octagon Micro PC system It is designed to be used with any other Micro PC Control Cards Y ou can use your 5554 5558 card in conjunction with other Micro PC expansion cards tailoring your system for a wide variety of applications The 5554 5558 card can also be used in an IBM compatible PC Micro PC cards are too tall to fit in an XT but will fit in AT industrial size and other AT size cases All Micro PC products are modular so creating a system is as easy as selecting and plugging in the products you need CONVENTIONS USED IN THIS MANUAL 1 Information which appears on your screen output from your system or commands or data that you key in is shown in a different type face note the line breaks may not match those on your screen but the message will be similar Example 1 Octagon 5025 ROM BIOS Vers X XX Copyright c 1992 1993 Octagon Systems Corp All Rights Reserved Example 2 Press the ESC key 2 Italicized refers to2. The chance of a random component failure is very rare since the average MTBF of an Octagon card is greater than 11 years In a 7 year study Using CMOS Circuitry 2 Octagon has never found a single case where multiple IC failures were not caused by misuse or accident It is very probable that multiple component failures indicate that they were user induced Testing dead cards For a card that is completely nonfunctional there is a simple test to determine accidental over voltage reverse voltage or other forced current situations Unplug the card from the bus and remove all cables Using an ordinary digital ohmmeter on the 2 000 ohm scale measure the resistance between power and ground Record this number Reverse the ohmmeter leads and measure the resistance again If the ratio of the resistances is 2 1 or greater fault conditions most likely have occurred A common cause is miswiring the power supply Improper power causes catastrophic failure f a card has had reverse polarity or high voltage applied replacing a failed component is not an adequate fix Other components probably have been partially damaged or a failure mechanism has been induced Therefore a failure will probably occur in the future For such cards Octagon highly recommends that these cards be replaced Other over voltage symptoms In over voltage situations the programmable logic devices EPROMs and CPU chips usually fail in this order The fai
3. Transceivers 5 Access m Quad Port 1 Indicator Y Serial I O Port 2 Control e o g a Port 3 E Ports 1 4 gt a Ws Port 4 E RS 422 485 m Config amp gt Termination Port 3 LE 5 e EN LO E 5 28 15 Oo D Ce 3a S 5 8 Base 7 e9 IC 2 lt T r Port 4 W4 Quad Serial Port 5 Control 2 Port 6 o 5 gt S Ports 5 8 Port 7 sH E Port8 Figure 2 2 5554 5558 Functional Block Diagram Installation 9 Base Address The 5554 5558 is configured at the factory to operate in most systems without any jumper changes umper block W4 defines the base address of serial port 1 As shipped the base address of serial port 1 is 100H which is jumper configuration W4 1 2 3 4 If there is another card in your system with a base address of 100H you must use a different base address for the 5554 5558 or the other expansion card W4 Base Address Select Pins umpered Base Address 5554 Quad 5558 Octal 1 2 3 41 5 6 1 2 3 4 100H 1 2 5 6 1 2 140H 3 4 5 6 3 4 180H 5 6 Not jumpered 1COH default NOTE J umpers 5 6 should not be connected on the 5558 Oc
4. 6 Chapter 2 INSTALLATION The 5554 5558 Quad Octal Serial Card uses one slot of the Micro PC card cage It may be used with any Micro PC Control Card or Microcontroller WARNING The 5554 5558 contains static sensitive CMOS components The greatest danger occurs when the card is plugged into a card cage The card becomes charged by the user and the static discharges to the backplane from the pin closest to the card connector If that pin happens to be an input pin even TTL inputs may be damaged To avoid damaging your card and its components 1 Ground yourself before handling the 5554 5558 Quad Octal Serial Card 2 Disconnect power before removing or inserting the 5554 5558 card EQUIPMENT You will need the following equipment or equivalent to use your 5554 5558 Micro PC Control Card or Microcontroller 5554 5558 Quad Octal Serial Card 5554 5558 Utility Disk Micro PC Card Cage Power Module PC SmartLINK or other communications software INSTALLATION Before installing the 5554 5558 Quad Octal Serial Card refer to Figure 2 1 for the location of various connectors and jumpers and to Figure 2 2 for functional block information Installation 7 RS 422 485 Select Interrupt Select and Network Termination RS 232 Interrupt Channeling RS 422 485 Base Address Select and Quad Octal Select RS 232 Figure 2 1 5554 5558 Component Diagram Installation 8 PC Bus
5. NM All A10 A9 A8 A7 A6 A5 A4 A3 A2 Al AO O O O O O O O O O O O O active low Technical Data 25 Micro PC B B1 GND B2 RESET B3 5V B4 IRQ2 B5 5V B6 DRQ2 B7 12V B8 Reserved B9 12V B10 Analog Gnd B11 MEMW B12 MEMR B13 IOW B14 IOR B15 DACK3 B16 DRQ3 l B17 O B18 l B19 l B20 Not used B21 l B22 Not used B23 Not used B24 Not used B25 Not used 26 o ex o ms O 29 o e o em DACKI O DRQ1 l DACKO CLOCK IRQ7 l IRQ6 l IRQ5 l IRQ4 l IRQ3 DACK2 T C ALE Aux 45V OSC Aux Gnd active low Technical Data 26 WARRANTY Octagon Systems Corporation Octagon warrants that its stan dard hardware products will be free from defects in materials and workmanship under normal use and service for the current established warranty period Octagon s obligation under this warranty shall not arise until Buyer returns the defective product freight prepaid to Octagon s facility or another specified location Octagon s only responsibility under this warranty is at its option to replace or repair free of charge any defective component part of such products LIMITATIONS ON WARRANTY The warranty set forth above does not extend to and shall not apply to 1 Products including software which have been repaired or altered by other than Octagon personnel unless Buyer has proper
6. be on the top edge of the card and the gold contact fingers toward the backplane A31 Card Edge Pins A31 amp B31 5554 5558 Quad Octal Serial Card Card Edge Pins A1 amp B1 Micro PC Motherboard A1 B1 Figure 2 3 Card Edge Orientation Installation 13 Power on the system The 5554 5558 Utility Disk contains example QuickBASIC and C programs for accessing the serial ports To verify test the 5554 5558 download the program 5558TST E XE to your Control Card and execute the program Refer to your Control Card user s manual for more information on downloading files Refer to the READ ME on the utility disk for more information on the example programs The amber LED will light briefly whenever the 5554 5558 card is accessed input or output Installation 14 CHAPTER 3 RS 422 485 RS 422 485 COMPATIBILITY With the 5554 5558 you can change port 3 and or port 4 from RS 232 operation to RS 422 485 The RS 422 485 compatible ports are accessed through P2 and P3 You can connect up to 32 units on a multidrop RS 485 network However only one trans mitter can be active at a time Although no wire type or maximum wire length is specified in the EIA 485 specification the EIA 422 specification which is very similar lists a maximum length of 4000 ft J umper block W5 configures the card for the RS 422 485 option and also installs or removes the termination network A terminatio
7. in line control reg RTS 2 RTS enable in line control reg RD 1 receive data interrupt INTRPT 8 interrupt enable bit bdmsb 0 bdlsb 12 12 9600 baud FOR port 1 TO maxports portadd boardaddt port 1 8 OUT portadd 3 amp H80 enable divisor latch DLAB OUT portadd bdlsb set divisor latch LSB OUT portadd 1 bdmsb set divisor latch MSB OUT portadd 3 N81 set parity data bits stop bit OUT portadd 1 RD receive data interrupt OUT portadd 4 RTS DTR INTRPT set RTS DTR intrpt revent port 0 initialize receive buffer count NEX enable fcv transmit fifo clear fifos set rcv fifo int level to 1 FOR port 1 TO maxports portadd boardaddt port 1 8 OUT portadd42 7 EXT D SUB n UB sendstring port a portbase boardadd port 1 8 IF rs485 port 1 THEN turn DTR off on 485 OUT portbase 4 amp HA END IF FOR I 1 TO LEN a check if transmitter holding register is empty before transmitting WHILE INP portbase 5 AND amp H20 0 WEND RS 422 485 19 OUT portbase ASC MIDS a 1 1 NEXT IF rs485 port 1 THEN turn DTR off make sure last char went out test shift register is empty WHILE INP portbase 5 AND amp H20 20 WEND WHILE INP portbase 5 AND amp H40 0 WEND OUT portbaset 4 amp HB turn DTR on when done for 485 END IF END SUB SUB rcvchars
8. is provided for reference only Octagon does not assume any liability arising out of the application or use of the information or products described in this manual This manual may contain or reference information and products protected by copyrights or patents No license is conveyed under the rights of Octagon or others
9. Micro PC cards exceeds 11 years yet there are failures Most failures have been identified as customer induced but there is a small percentage that cannot be identified As expected virtually all the failures occur when bringing up the first system On subsequent systems the failure rate drops dramatically W Approximately 20 of the returned cards are problem free These cards typically have the wrong jumper settings or the customer has problems with the software This causes frustration for the customer and incurs a testing charge from Octagon m Of the remaining 80 of the cards 90 of these cards fail due to customer misuse and accident Customers often cannot pinpoint the cause of the misuse W Therefore 72 of the returned cards are damaged through some type of misuse Of the remaining 896 Octagon is unable to determine the cause of the failure and repairs these cards at no charge if they are under warranty The most common failures on CPU cards are over voltage of the power supply static discharge and damage to the serial and parallel ports On expansion cards the most common failures are static discharge over voltage of inputs over current of outputs and misuse of the CMOS circuitry with regards to power supply sequencing In the case of the video cards the most common failure is to miswire the card to the flat panel display Miswiring can damage both the card and an expensive display m Multiple component failures
10. NOTICE The drivers and utilities for Octagon products previously provided on a CD are now in a self extracting zip file located at the Octagon Systems web site on the product specific page Download this file to a separate directory on your hard drive then double click on it to extract the files All references in this manual to files and directories on the CD now refer to files in the Utilities zip file 5554 5558 User s Manual Doc 03580 Rev 0198 OCTAGON SYSTEMS CORPORATION 9 6510 W 91st Ave Westminster CO 80030 Tech Support 303 426 4521 COPYRIGHT Copyright 1993 94 1998 Octagon Systems Corporation All rights reserved However any part of this document may be reproduced provided that Octagon Systems Corporation is cited as the source The contents of this manual and the specifications herein may change without notice TRADEMARKS Micro PC PC SmartLink Octagon Systems Corporation the Octagon logo and the Micro PC logo are trademarks of Octagon Systems Corporation QuickBASIC is a registered trademark of Microsoft Corporation ROM DOS is a trademark of Datalight NOTICE TO USER The information contained in this manual is believed to be correct However Octagon assumes no responsibility for any of the circuits described herein conveys no license under any patent or other right and makes no representations that the circuits are free from patent infringement Octagon makes no representation or
11. R Upon determining that repair services are required the customer must 1 Obtain an RMA Return Material Authorization number from the Customer Service Department 303 430 1500 2 If the request is for an out of warranty repair a purchase order number or other acceptable information must be sup plied by the customer 3 Indudea list of problems encountered along with your name address telephone and RMA number 4 Carefully package the product in an antistatic bag Failure to package in antistatic material will VOID all warranties Then package in a safe container for shipping Write RMA number on the outside of the box For products under warranty the customer pays for shipping to Octagon Octagon pays for shipping back to customer 7 Other conditions and limitations may apply to international shipments DM NOTE PRODUCTS RETURNED TO OCTAGON FREIGHT COLLECT OR WITHOUT AN RMA NUMBER CANNOT BE ACCEPTED AND WILL BE RETURNED FREIGHT COLLECT RETURNS There will be a 15 restocking charge on returned product that is unopened and unused if Octagon accepts such a return Returns will not be accepted 30 days after purchase Opened and or used products non standard products software and printed materials are not returnable without prior written agreement GOVERNING LAW This agreement is made in governed by and shall be construed in accordance with the laws of the State of Colorado The information in this manual
12. ars ago at Octagon was excessive lead lengths on digital inputs Long leads act as an antenna to pick up noise They can also act as unterminated transmission lines When 5V is switch onto a line it creates a transient waveform Octagon has seen submicrosecond pulses of 8V or more The solution is to place a capacitor for example 0 1 uF across the switch contact This will also eliminate radio frequency and other high frequency pickup Using CMOS Circuitry 4 TABLE OF CONTENTS ldizz iel reer 1 Conventions Used In 5 1 Symbols and Terminology sisii iiinis aeiia 2 Technical SUpport 5a5 erbe inen pilan ci l ete dde 3 CHAPTER 1 5 Maj r EGatlf65 wi r yeka Hakan Gall AR nye da WE Ha i ra R BENA 5 CHAPTER 2 7 E QUL DIT E debere eia etd 7 Waste e 7 Base Address ieooi iioi ogibon aoro iun qan Ore 10 PNterrU pt Selection uio Don mr retos 10 Installing the 5554 5558 ss iioi ee apos 13 CHAPTER 3 5 422 485 15 RS 422 485 Compatibility riirii 15 Operating Precautions tnr ed 16 Baud Rate nin n e ala eka lia PEE Ey i R N N 16 Two or Four Wire Communication k k L i eee 16 Transmission Timing
13. d W2 NOTE The IRQ selected by W1 must be different than the IRQ selected by W2 Also on a 5558 configured for just one interrupt source W3 1 2 should be jumpered W2 should also be configured as No interrupts pins 1 3 The following table shows the relationship between the various ports and connectors 5554 5558 Ports and Connectors Connector 11 12 13 and P2 J 4and P3 Port 5 15 Port 6 J6 Port 7 17 Port 8 J8 Installation 12 Installing the 5554 5558 WARNING Take care to correctly position the 5554 5558 in the card cage The V and ground signals must match those on the backplane Figure 2 3 shows the relative position of the 5554 5558 as it is installed in the card cage 1 Verify the base address settings are correct for your applica tion 2 Turn the card cage power off 3 Position the cage so that the backplane is away from you the power module is to the right and the open side of the cage is closest to you The lettering on the backplane should be right side up for example you should be able to read A31 on the backplane with the words OCTAGON SYSTEMS CORP running vertically along the left side of the backplane This position is feet down for a table mount cage and feet back for a rear mount 4 Slide the 5554 5558 into the card cage The components on the card should face to the left The lettering on the card Octa gon Systems Corp should
14. ect Pins umpered Base Address 5558 Octal 1 2 3 4 5 6 1 2 3 4 100H 1 2 5 6 1 2 140H 3 4 5 6 3 4 180H 5 6 Not jumpered 1COH default NOTE J umpers 5 6 should not be connected on the 5558 Octal Card W5 RS 422 485 Select and Network Termination 8 10 13 15 14 16 Description RS 422 485 inactive Receive data at port 3 P2 Active amp Terminated Plus termination Minus termination 8 10 Receive data at port 3 P2 Active amp Unterminated 15 17 Plus termination 16 18 Minus termination Receive data at port 4 P3 Active and Terminated Plus termination Minus termination 7 9 Receive data at port 4 P3 Active amp Unterminated 3 5 Plus termination 4 6 Minus termination default Technical Data 23 CONNECTOR PINOUTS Serial Ports 1 J 8 9 10 Function Direction CTS DTR RI Gnd 45V active low RS 422 485 P2 amp P3 Function Receive Receive Transmit Transmit Gnd Technical Data 24 PC BUS PINOUTS Micro PC A Pin Description A1 1 0 CH CK A2 D7 A3 D6 A4 D5 A5 D4 A6 D3 A7 D2 A8 D1 A9 DO A10 1 0 CH RDY an AEN A12 A19 a13 A18 a14 A17 A15 A16 a16 A15 l A17 1 0 A18 1 0 A19 1 0 A20 1 0 A21 1 0 A22 1 0 A23 1 0 A24 1 0 25 l A26 o far o fas O 29 O A30 O A31 M
15. em if the ground pin is connected first but there is no guarantee of this Damage to the printer port chip will cause the serial ports to fail as they share the same chip Hot insertion Plugging cards into the card cage with the power on will usually not cause a problem Octagon urges that you do not do this However the card may be dam aged if the right sequence of pins contacts as the card is pushed into the socket This usually damages bus driver chips and they may become hot when the power is applied This is one of the most common failures of expansion cards Using desktop PC power supplies Occasionally a cus tomer will use a regular desktop PC power supply when bringing up a system Most of these are rated at 5V at 20A or more Switching supplies usually require a 2096 load to operate properly This means 4A or more Since a typical Micro PC system takes less than 2A the supply does not regulate properly Customers have reported that the output can drift up to 7V and or with 7 8V voltage spikes Unless a scope is connected you may not see these transients Terminated backplanes Some customers try to use Micro PC cards in backplanes that have resistor capacitor termina tion networks CMOS cards cannot be used with termination networks Generally the cards will function erratically or the bus drivers may fail due to excessive output currents Excessive signal lead lengths Another source of failure that was identified ye
16. information that is specific to your particu lar system or program For example Enter filename means enter the name of your file Names of other sections or manuals are also italicized 3 Warnings always appear in this format WARNING The warning message appears here Preface 1 4 Paired angle brackets are used to indicate a specific key on your keyboard For example E SC means the escape key CTRL 7 means the control key lt F 1 means the F 1 function key 5 All addresses are given in hexadecimal SYMBOLS AND TERMINOLOGY Throughout this manual the following symbols and terminology are used WI J Denotes a jumper block and the pins to connect NOTE Information under this heading presents helpful tips for using the 5700 Card WARNING Information under this heading warns you of situations which might cause catastrophic or irreversible damage H The suffix H denotes a hexadecimal number For example 1000H in hexa decimal equals 4096 in decimal TTL Compatible Transistor transistor logic compatible O 5V logic levels Preface 2 TECHNICAL SUPPORT If you have a question about the 5554 5558 expansion card and cannot find the answer in this manual call Technical Support They will be ready to give you the assistance you need When you call please have the following at hand Your 5554 5558 Quad Octal Serial Card User s Manual A description of your problem The direct line t
17. led device may be hot to the touch It is usually the case that only one IC will be overheated at a time Power sequencing The major failure of I O chips is caused by the external application of input voltage while the Micro PC power is off If you apply 5V to the input of a TTL chip with the power off nothing will happen Applying a 5V input toa CMOS card will cause the current to flow through the input and out the 5V power pin This current attempts to power up the card Most inputs are rated at 25 mA maximum When this is exceeded the chip may be damaged Failure on power up Even when there is not enough current to destroy an input described above the chip may be destroyed when the power to the card is applied This is due to the fact that the input current biases the IC so that it acts as a forward biased diode on power up This type of failure is typical on serial interface chips Using CMOS Circuitry 3 Serial and parallel Customers sometimes connect the serial and printer devices to the Micro PC while the power is off This can cause the failure mentioned in the above section Failure upon power up Even if they are connected with the Micro PC on there can be another failure mechanism Some serial and printer devices do not share the same power AC grounding The leakage can cause the serial or parallel signals to be 20 40V above the Micro PC ground thus damaging the ports as they are plugged in This would not be a probl
18. ly altered or repaired the products in accordance with procedures previously approved in writing by Octagon 2 Products which have been subject to power supply reversal misuse neglect accident or improper installation 3 Thedesign capability capacity or suitability for use of the Software Software is licensed on an AS IS basis without warranty The warranty and remedies set forth above are in lieu of all other warranties expressed or implied oral or written either in fact or by operation of law statutory or otherwise including warranties of merchantability and fitness for a particular purpose which Octagon specifically disclaims Octagon neither assumes nor authorizes any other liability in connection with the sale installa tion or use of its products Octagon shall have no liability for incidental or consequential damages of any kind arising out of the sale delay in delivery installation or use of its products SERVICE POLICY 1 Octagon s goal is to ship your product within 10 working days of receipt 2 Ifa product should fail during the warranty period it will be repaired free of charge For out of warranty repairs the customer will be invoiced for repair charges at current stan dard labor and materials rates 3 Customers that return products for repairs within the warranty period and the product is found to be free of defect may be liable for the minimum current repair charge RETURNING A PRODUCT FOR REPAI
19. n network must be installed at the last receiver of the network Failure to do so may cause spurious oscillation on the receive line and corrupt incoming data W5 RS 422 485 Select and Network Termination 8 10 13 15 14 16 Description RS 422 485 inactive Receive data at port 3 P2 Active amp Terminated Plus termination Minus termination 8 10 Receive data at port 3 P2 Active Unterminated 15 17 Plus termination 16 18 Minus termination Receive data at port 4 P3 Active and Terminated Plus termination Minus termination 7 9 Receive data at port 4 P3 Active amp Unterminated 3 5 Plus termination 4 6 Minus termination default NOTE When activating the RS 422 485 option serial O ports at J 3 and or J 4 are not available RS 422 485 15 OPERATING PRECAUTIONS The transmitter and receiver are not optically isolated so you must avoid ground loops Power grounds cannot be used as a reference ground for RS 485 signals Establish a common ground reference before implementing your 485 network The maximum common mode voltage output is 4 7V Refer to the EIA 485 specification for further details on grounding and safety procedures Baud Rate The 5554 5558 supports software selectable baud rates of 300 1200 2400 4800 9600 19 2K 38 4K 56K and 115 2K Two or Four Wire Communication The 5554 5558 ports 3 and 4 can be configured for either two
20. o Technical Support is 303 426 4521 Preface 3 This page intentionally left blank Preface 4 CHAPTER 1 OVERVIEW The 5554 5558 Quad Octal Serial Card is designed for applications which require intensive serial communications such as protocol translation multiple bar code readers and radio modems 16 byte transmit and receiver FIFOs minimize overhead by the Control Card The card is 4 5 in x 4 9 in and operates over a wide temperature range from 40 to 85 C and requires only 5V for operation MAJOR FEATURES 4 8 Serial Ports The 5554 5558 comes with either four or eight RS 232 serial ports Two of the ports are jumper selectable to RS 422 485 operation RS 485 Operation Both RS 485 ports use a 5 position terminal block The blocks are routed to serial ports three and four Each of the two RS 485 ports can be terminated or unterminated via jumper block W5 Industry Standard 16C450 UART Compatible Each of the serial channels can operate either in a polled or interrupt mode The interrupt mode is enabled via an internal register of the 16C554 controller and associated jumpers Each of the interrupts is funneled into a single interrupt that can be jumpered to one of the hardware interrupts IRQ3 to IRQ7 The interrupt request status of all channels can be read from a single read only location to resolve which of the channels on the board require service Overview 5 This page intentionally left blank Overview
21. owing QuickBASIC program shows how to initialize the port for 9600 baud no parity 8 data bits and sets ports 3 and 4 for RS 485 communication 1stop bit It also Also refer to the 5554 5558 Utility Disk file 5554QB BAS for PRINTS PRINTSL code DECLARE SUB PRINTS A DECLARE SUB PRINTSL A SINCLUDE BQ BI DE DE DE c C C ARE ARE ARE SUB sendstring SUB rcvchars SUB initports DIM rcbuf 8 DIM revent 8 DIM rs485 8 COMMON SHARED boardadd COMMON SHARED rcvbuf 80 boardadd amp H100 statusadd revent port A maxports rs485 statusadd boardadd 7 maxports 8 CALL initports CALL PRINTSL Sending COM1 outport 1 CALL sendstring 1 COM1 CALL PRINTSL Waiting to receive from any port CALL PRINTSL Press any key to end test DO CALL rcvchars go get some characters FOR port 1 TO maxports IF rcevent port lt gt 0 THEN CALL PRINTS STR port FOR I 1 to rcvont port CALL PRINTS CHRS rcvbuf port NEXT I CALL PRINTS rcvcnt port 0 END IF NEXT port LOOP WHILE INKEYS END CALL PRINTSL RS 422 485 18 Q UB initports FOR port 1 TO maxports rs485 port 0 default all ports not rs485 NEXT rs485 3 1 rs485 4 1 set ports 3 4 to rs485 N81 3 no parity 8 data bits 1 stop bit DTR 1 DTR enable
22. status INP statusadd DO port 1 portadd boardadd poll to receive characters WHILE status lt gt 0 IF status AND 1 THEN rcvcnt port rcevent 1 rcvbuf port rcvent port INP portadd END IF status INT status 2 portadd portadd 8 port portt l WEND status INP statusadd LOOP WHILE status lt gt 0 END SUB RS 422 485 20 CHAPTER 4 TECHNICAL DATA TECHNICAL SPECIFICATIONS Environmental 40 to 85 C operating 50 to 90 C nonoperating RH 5 to 9596 noncondensing Power Specification 5554 5V 596 at 80 mA max 5558 5V 596 at 150 mA max Size 4 5 in x 4 9 in 1 O Map 5554 5558 I O Map 5554 Port 2 108 148 188 1C8 Quad pPorta 110 ar Ji S2 ae NOTE W4 5 6 must be on for 5554 Quad only Technical Data 21 JUMPER SETTINGS W1 W2 Interrupt Select Reserved for DOS IRQ3 COM2 amp COM4 1 2 1 2 IRQ 4 COM1 COM3 3 4 3 4 5 6 5 6 IRQ5 Hard disk 7 8 7 8 IRQ6 Floppy disk 9 10 9 10 IRQ 7 1 3 1 3 No interrupts NA default Not used by Datalight ROM DOS NOTE W2 applies tothe 5558 ports 5 8 W3 Interrupt Channeling Pins umpered Interrupts 2 3 Quad 1 interrupt 1 2 Octal 1 interrupt 2 3 Octal 2 interrupts default for 5554 gefault for 5558 Technical Data 22 W4 Base Address Sel
23. tal Card Interrupt Selection There are five interrupts available on the 5554 5558 The follow ing table lists the available interrupts and appropriate jumper settings Installation 10 W1 amp W2 Interrupt Select Reserved for DOS 1 2 1 2 IRQ3 COM2 amp COMA 3 4 3 4 IRQ 4 COM1 COM3 5 6 5 6 IRQ5 Hard disk 7 8 7 8 IRQ6 Floppy disk 9 10 9 10 IRQ7 1 3 1 3 Nointerrupts NA default Not used by Datalight ROM DOS NOTE W2 applies to the 5558 ports 5 8 With the four port 5554 only one interrupt is available The interrupt signal from each port is combined into one interrupt source That interrupt source can be jumpered to one of five hardware interrupts at W1 Theinterrupt channeling at W3 must be set for Quad operation with one interrupt W3 Interrupt Channeling Interrupts 2 3 Quad 1 interrupt 1 2 Octal 1 interrupt 2 3 Octal 2 interrupts default for 5554 default for 5558 Installation 11 With the 5558 configured for eight port operation the interrupt signal from each port can be e combined into one interrupt source or e combined into two interrupt sources one interrupt for ports 1 4 and one interrupt for ports 5 8 Depending on the options selected the interrupt channeling at W3 must be set for either one or two interrupt operation and the hardware interrupt configured at W1 an
24. war ranty that such applications will be suitable for the use specified without further testing or modification Octagon Systems Corporation general policy does not recommend the use of its products in life support applications where the failure or malfunction of a component may directly threaten life or injury It is a Condition of Sale that the user of Octagon products in life support applications assumes all the risk of such use and indemnifies Octagon against all damage IMPORTANT Please read before installing your product Octagon s products are designed to be high in performance while consuming very little power In order to maintain this advantage CMOS circuitry is used CMOS chips have specific needs and some special requirements that the user must be aware of Read the following to help avoid damage to your card from the use of CMOS chips Using CMOS Circuitry 1 Using CMOS Circuitry in Industrial Control Industrial computers originally used LSTTL circuits Because many PC components are used in laptop computers IC manufac turers are exclusively using CMOS technology Both TTL and CMOS have failure mechanisms but they are different This section describes some of the common failures which are common to all manufacturers of CM OS equipment However much of the information has been put in the context of the Micro PC Octagon has developed a reliable database of customer induced field failures The average MTBF of
25. wire half duplex or four wire full duplex communication The choice of the configuration is application specific and also dependent on the protocol of the network software Figures 3 1 and 3 2 show how to configure your system for either two or four wire communi cation 5 422 485 2 Wire Half Duplex Transmission Figure 3 1 Two Wire Communication RS 422 485 16 RS 422 485 4 Wire Full Duplex Transmission Figure 3 2 F our Wire Communication Transmission Timing The transmitter must be enabled prior to transmitting a message and disabled immediately after the stop bit of the last character of the message has been sent The transmitter of the RS 422 485 is enabled disabled using the DTR control for the associated port The register for the DTR signal is located at address Base 24H for P2 and Base 34H for P3 Bit 0 of the register must be cleared to a 0 to enable the RS 422 485 transmitter After the last byte of the information is sent the transmitter must be disabled Before disabling the transmitter make sure the following conditions exist e The UART transmitter holding register is empty e The UART shift register is empty To disable the transmitter set bit O of the register toa 1 This algorithm works for both two and four wire talker and listener modes of operation NOTE When modifying DTR do not modify other bits in the register RS 422 485 17 PROGRAMMING EXAMPLE The foll
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