CM310 Quad Serial Port utilityModule User`s Manual
Contents
1. oa ofc lil Na ENS Bl ajo ce eee NYA ANS AL alajd dOt oGHEXOAHHOAHRHAKXH YNHOHOAOAt KH Gd NAG rose OO CfdJo oo ooo opdaed O ee oE u oo momo ovwuvuVvoooon GU Figure 2 Connector Locations Table 4 Connector Table 2 COM port 3 COM port 4 COM port CM310 Quad Serial utilityModule 14 RTD Embedded Technologies Inc PC 104 Bus Connectors CN1 and CN2 Connectors CN1 and CN2 provide PC 104 bus connections CN1 carries XT bus signals and CN2 carries additional signals for the AT bus The signals on CNI and CN conform to the IEEE P966 standard for the PC 104 bus The following tables list the connector pinouts I 5 CM310 Quad Serial utilityModule CINTA M AJN Re 42 49 43 N9 N9 IN 2 N0 N N N N D selelelelelelelelslo NI E OPO E S DN B E O O F S N MIB O N H O Table 5 PC 104 XT Bus Connector PC 104 XT Bus Connector CN1 Row A IOCHCHK SD7 SD6 SD5 SD4 SD3 SD2 SD1 SDO IOCHRDY AEN SA19 SA18 SA17 SA16 SA15 SA14 SA13 SA12 SA11 SA10 SA9 SA8 SA7 SA6 SA5 SA4 SA3 SA2 SA1 SAO OV 15 Row B OV RESETDRV 5V IRQ9 5V DRQ2 12V ENDXFR 12V KEYING PIN SMEMW SMEMR IOW IOR DACK3 DRQ3 DACK1 DRQ1 REFRESH SYSCLK IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 DACK2 TC BALE 5V OSC OV OV RTD Embedded Technologies Inc Table 6 PC 104 AT Bus Conne2. e Self explanatory diagnostic program included CM310 Quad Serial utilityModule 6 RTD Embedded Technologies Inc Connectors and Switches Connectors provided are e CNI PC 104 Bus XT e CN2 PC 104 Bus AT e CN3 First COM port e CN4 Second COM port CN5 Third COM port e CN6 Fourth COM port Switches provided are e SWI Base address selection e SW2 Enable Disable and RS232 RS422 486 mode e SW3 First and second port RS422 485 termination e SWA4 Third and forth port RS422 485 termination Recommended Cables XK CM310 General Specifications Dimensions 3 8 x 3 9 x 0 6 97 x 100 x 16 mm e Weight mass 3 0 ounces 85 grams e 6 layer PCB e Operating conditions e Temperature 40 85 degrees C e Relative humidity O 95 non condensing e Storage temperature 55 to 125 degrees C Configuring the utilityModule The following sections contain information on configuring the utilityModule Please read this entire section before attempting to use the utilityModule CM310 Quad Serial utilityModule 7 RTD Embedded Technologies Inc Jumpers and Switches Locations The figure below shows switch and jumper locations SW4 SV 3 mi Glo olo Jo o 2 glo ojo 3 o ol3 ajo ojo plo o 4 ajo 0 3 o o Jpg COM3 IRA SE
3. indicates one or more of the receive channels has data ready to read 1 indicates that all receive buffers are empty Reserved reads as 0 BA 1 Address Switch Read Only 7 6 5 4 3 2 1 0 Reserved Reserved Reserved Reserved SW1 4 SW1 3 SW1 2 SW1 1 For each bit see table above 0 Down 1 Up Reserved reads as A to tag on the address register BA 2 Enable Disable Switch Read Only 7 6 5 4 3 2 1 0 Reserved Reserved Reserved Reserved CN6 CNS CN4 CN3 For each CNx bit 0 Port is disabled 1 Port is enabled Reserved reads as OxA for clarity BA 3 Mode Switch Read Only 7 6 5 4 3 2 1 0 Reserved Reserved Reserved Reserved CN6 CNS CN4 CN3 For each CNx bit If 0 RS 232 1 RS 422 485 Reserved reads as 0 BA 4 RS 422 RTS operation R W 7 6 5 4 3 2 1 0 Reserved Reserved Reserved IntSel CN6 CNS CN4 CN3 IntSel 0 MCR bit 3 controls the three state interrupt output 1 Overrides MCR bit 3 and interrupt outputs are enabled continuously Default to O to set COM ports in normal mode For each CNx bit If Mode RS 232 then Not used Reads as O Else If Mode RS 422 485 then 0 use RTS to enable transmitter default case 1 transmitter always on CM310 Quad Serial utilityModule 21 RTD Embedded Technologies Inc Chapter 3 USING THE UTILITYMODULE COM ports The utilityModule features EXAR quad UART 16C550 compatible 16C554D part EXAR Documentation Due to the complexity of the EXAR serial chip it is impossible
4. 0 and serial transmitter is disabled e If MCR bit 1 0 then RTS 1 and serial transmitter is enabled For more information on the serial port registers including the MCR please refer to a standard PC AT hardware reference for the 16C550 UART or refer to RTDUSA application note ANC102 at http www rtdusa com The other way to enable the serial transmitter is to write 1 to its corresponding bit of the utilityModule s internal common register 4 which sets the serial transmitter in always on mode Please refer to Internal Common Register Section for detail Second COM port CN4 Please refer to the previous section on the first COM port CN3 for the description on CN4 Third COM port CN5 Please refer to the previous section on the first COM port CN3 for the description on CNS Fourth COM port CN6 Please refer to the previous section on the first COM port CN3 for the description on CN6 CM310 Quad Serial utilityModule 19 RTD Embedded Technologies Inc CM310 common registers The utilityModule includes 5 common registers to provide additional information and software control that is not required for normal COM port operation but may be helpful in determining the status of the board and configuring of the board The following two sections give the location and definition of the common registers Base Address of Common Registers The utilityModule common registers are located 800h above the address of the first enabled C
5. Down Use 120 on board serial termination resistor for RS422 485 mode Switch position Port and signal 1 CNS RxD CNS CTS 2 3 CN6 RxD 4 CN6 CTS CM310 Quad Serial utilityModule 11 RTD Embedded Technologies Inc Table 3 Base address table for COM ports COM port addresses base address in Hex for eight 8 bit registers SW1 4 SW 3 SW 2 SW 1 CN3 CN4 CNS CN6 Down Down Down Down 3E8 2E8 280 288 Down Down Down Up 280 288 290 298 Down Down Up Down 290 298 2A0 2A8 Down Down Up Up 2A0 2A8 2B0 2B8 Down Up Down Down 100 108 110 118 Down Up Down Up 120 128 130 138 Down Up Up Down 140 148 150 158 Down Up Up Up 160 168 170 178 Up Down Down Down 100 108 500 508 Up Down Down Up 120 128 520 528 Up Down Up Down 280 288 680 688 Up Down Up Up 290 298 690 698 Up Up Down Down 2A0 2A8 6A0 6A8 Up Up Down Up 2B0 2B8 6B0 6B8 Up Up Up Down 3E8 2E8 TES 6E8 Up Up Up Up 3F8 2F8 3E8 2E8 CM310 Quad Serial utilityModule 12 RTD Embedded Technologies Inc Chapter 2 INSTALLING THE UTILITYMODULE Since the utilityModule uses a PC 104 stackthrough bus the only hardware installation you will do is placing the module to the PC 104 stack To do this you will connect the PC 104 bus connector with the matching connector of another module Recommended Procedure We recommend you follow the procedure below to ensure that stacking of the modules does not damage connectors
6. Reversed polarity e Excessive voltage This protection is only for the utilityModule and will not protect other devices in a PC 104 stack The protective fuse is replaceable and is available from electronics suppliers Its description and part number is Littelfuse Nano SMF 1 0 amp R451 001 Caution Replace fuses only with parts of identical current and voltage rating CM310 Quad Serial utilityModule 24 RTD Embedded Technologies Inc Chapter 4 RETURN POLICY AND WARRANTY Return Policy If you wish to return a product to the factory for service please follow this procedure Read the Limited Warranty to familiarize yourself with our warranty policy Contact the factory for a Return Merchandise Authorization RMA number Please have the following available Complete board name Board serial number A detailed description of the board s behavior List the name of a contact person familiar with technical details of the problem or situation along with their phone and fax numbers address and e mail address if available List your shipping address Indicate the shipping method you would like used to return the product to you We will not ship by next day service without your pre approval Carefully package the product using proper anti static packaging Write the RMA number in large 1 letters on the outside of the package Return the package to RTD Embedded Technologies Inc 103 Innovation Blvd State Colle
7. UTILITYMODULE seeeessocesscceessccesscocesoocsssoocessocesscocessocssssocessocesseceesscossssoessseeeee 22 COMPORTA A aiba ORG Ba aE 22 RA NAN T encanissar elencos alocado bus ratb cdo adela ato A added al cedo ea e 22 INTERRUPT SHARING A A A GD eed ANAN 22 DIAGNOSTIE SOFTWARE lies 23 POWER PROTECTON CIRCUTRY A a id 24 CHAPTER 4 RETURN POLICY AND WARRANTY 0 ssccccsssscccssssccsssscccsssscccssssscccsssccscessccsssssscsssssscesens 25 RETURN POLICY is 25 LIMITED WARRANT a A rE a E BANDANA LAN ADD IRAN PAK NLANG ALA pA RN ees LAN ANG 26 CM310 Quad Serial utilityModule 4 RTD Embedded Technologies Inc Table of Tables TABLE 1 DEFAULT JUMPER SETTINGS 200000000000000 9 TABLE 2 SWITCH AND JUMPER TABLES okays oss PABABANG AA A NAAN 10 TABLE 3 BASE ADDRESS TABLE FOR COM PORTS neie eain e eaer aa a aaa EE ETE T EE I K E ea 12 TABIE4 CONNECTOR TABLE oni nanara a a O ANNA NAI a E Ea e as 14 TABLE 5 PC 104 XT BUS CONNECTOR cccccccscescesceseesscsscscscesecssessesecsecsecsscsacsacesessecsecsecsessasasessesecasesscecssseeseaseas 15 TABLE 6 PC 104 AT BUS CONNECTOR 2 20 banna ea td tt lid 16 TABLE 7 CONNECTOR CN3 IN RS 232 MODE D u 0001 0200000 aaa ann seess sienoeniurossreriseeseriere seee sse territa sorer s ses sies 17 TABLE 8 CONNECTOR CN3 IN RS 232 MODE Il 011102000000000000000 NA 17 TABLE 9 CONNECTOR CN3 IN RS422 485 MODE I ceessscesesseceesssceeeessnecessnceeeesseeeesseeeeseeeeesseseeeeseaesessneeeeeseeeeenegs 18 T
8. be advised not to use share IRQ3 IRQ4 for the utilityModule unless you have serial ports on the cpuModule disabled Interrupt sharing in a PC 104 system requires one IK pull down resistor per IRQ line for all the devices that share the IRQ Installing a G jumper in the utilityModule will pull its associated IRQ line down with 1K resistor That is for example if IRQn is shared among four serial ports on the utilityModule only one G jumper needs to be installed for IRQn line If more than one G jumper are installed the pull down on IRQn line will be much stronger that expected 1K ohm which will prevent interrupt controller from functioning correctly CM310 Quad Serial utilityModule 22 RTD Embedded Technologies Inc NOTE Some operating systems do not support IRQ sharing for ISA devices If the OS does not support ISA IRQ sharing then you must assign each com port to its own IRQ Let consider two cases to demonstrate the concepts for the above discussion Let us assume that IRQ5 and IRQ10 are not used and driven by other devices in the system For the first case IRQ10 line is shared among the four serial ports and for the second case IRQ5 is shared for port 1 and port 2 while IRQ10 is shared among port 3 and port 4 The following two tables listed the interrupt jumper settings for each case respectively Table 11 Jumper Settings for interrupt sharing Case 1 J umper JP1 G jumper JP2 G jumper JP3 G jumper JP4 G jumper
9. for us to reproduce all programming information in this manual If you will be doing in depth programming of the serial port controller we suggest you obtain the 16C554D datasheet from the manufacturer The 16C554D datasheet is available on line in electronic format as an Adobe Acrobat PDF file on the EXAR website www exar com You may also contact EXAR Corporation 248720 Kato Road Fremont CA 94538 1 5 Mbps support With 24 MHz clock input selected JP5 1 2 the utilityModule is capable of provide data rates up to 1 5 Mbps in RS422 RS485 mode Since RS232 standard restricts data rate to 20 Kbps you might experience failure at higher data rate above 252 Kbps with 24 MHz clock select for the utilityModule Interrupt Sharing Interrupt sharing is a mechanism which allows different devices sharing same active high IRQ lines on the PC 104 bus given that there is a interrupt sharing circuit associated with each device The utility Module provides interrupt sharing circuits for all the serial ports thus it allows sharing of one IRQ line among the serial ports in the utilityModule However user needs to be careful to share an IRQ line with devices in the system elsewhere and be sure that other devices also share their IRQ lines as well For instance users should be aware of that the IRQ3 IRQ4 associated with serial port J3 J4 on RTDUSA cpuModule are not shareable And if the utilityModule is in the same system with RTDUSA cpuModule
10. or electronics e Turn off power to the PC 104 system or stack e Select and install standoffs to properly position the utilityModule on the PC 104 stack e Touch a grounded metal part of the stack to discharge any buildup of static electricity e Remove the utilityModule from its anti static bag e Check that keying pins in the PC 104 bus connector are properly positioned e Check the stacking order make sure an XT bus card will not be placed between two AT bus cards or it will interrupt the AT bus signals e Hold the utilityModule by its edges and orient it so the bus connector pins line up with the matching connector on the stack e Gently and evenly press the utilityModule onto the PC 104 stack CAUTION Do not force the module onto the stack Wiggling the module or applying too much force may damage it If the module does not readily press into place remove it check for bent pins or out of place keying pins and try again Connecting the utilityModule The following sections describe connectors of the utilityModule Finding Pin 1 of Connectors A white area silk screened on the PC board indicates pin 1 of connectors A square solder pad visible on the bottom of the PC board also indicates it CM310 Quad Serial utilityModule 13 RTD Embedded Technologies Inc Locations The figure below shows connector locations IK II A 00 of o o oto U KI 7 U m 7 1 fu
11. ABLE 10 CONNECTOR CN3 IN RS422 485 MODE Il 111720000000aaas ana Na 18 Table of Figures FIGURE SWITCH amp JUMPER LOCATIONS a 8 FIGURE 2 CONNECTOR LOCATIONS ccccccccccccccccecececccccccccececccececcceceeececesececececeeecesececececececececececececececeeeeeeececeseeeseceeeeeeess 14 CM310 Quad Serial utilityModule 5 RTD Embedded Technologies Inc Chapter 1 INTRODUCTION This manual gives information on the CM310 Quad Serial Port utilityModule This module supports four versatile serial ports for the 16 Intel bus interface type with jumper configurable IRQ lines and I O addresses for your PC 104 applications CM310 Quad Serial Port utility Module The CM310 Quad Serial Port utilityModule was designed to provide four versatile serial ports to support the Real Time Devices cpuModules and other standard PC 104 processor modules Features The following are major features of the CM3 10 utilityModule e Compatibility with the Industry Standard 16C550 e 1 5 Mbps baud transmit receive operation 24Mhz e 16 byte transmit FIFO 16 byte receive FIFO with error flags e Independent transmit and receive control e Standard modem interface e Jumper selectable interrupt line base address RS232 RS422 485 mode per port e Jumper selectable enable disable per port e Includes 42 different selectable I O base addresses e Extended temperature range 40 to 85C e Low power consumption e Typical from single 5V power supply Software Included
12. CM310 Quad Serial Port utilityModule User s Manual TITI RTD Embedded Technologies Inc Real Time Devices Accessing the Analog World BDM 610020016 Rev B CM310 Quad Serial utilityModule ISO90011 and AS9100 Certified TD Embedded Technologies Inc CM310 Quad Serial Port utilityModule User s Manual RTD Embedded Technologies INC 103 Innovation Blvd State College PA 16803 0906 Phone 1 814 234 8087 FAX 1 814 234 5218 E mail sales Ortd com techsupport rtd com web site http www rtd com CM310 Quad Serial utilityModule 2 RTD Embedded Technologies Inc Revision History 08 17 1999 Initial release 09 14 1999 Pull down resister jumpers added 10 18 1999 Self explanatory diagnostic program included 10 29 1999 Include 24Mhz clock to support 1 5 Mbps transceiver operation 02 01 2000 Changed SW2 to 8 position and made SW3 and SW4 terminations 02 02 2000 Reversed RS 422 signal names polarity 02 08 2000 Removed 25 pin D connector for RS 422 mode Rev A New Manual Naming Method Rev B 02 20 2008 Corrected default IRQ jumper settings to match current shipping configuration Resolved some ambiguity in the COM port numbering Added a note about IRQ sharing and OS limitations Published by RTD Embedded Technologies Inc 103 Innovation Blvd State College PA 16803 0906 Copyright 1999 2002 2003 2008 by RTD Embedded Technologies Inc All rights reserved The RTD Logo is
13. L jP1 COMI IRQ SEL D o ooaaanaaa D O ooaooana ala o o EA ee ee o o gt o Cum GUNA E E o o oo 9 gt 2 o POO 2 D D o o aii G o E CN JP4 COM4 RQ SEL 1 SWe Bif MfefoJo basnoodasonaaaanadoondoo nonono Al ofo o o 0009000000009 00 0009 000008 Ka Fuse y COMER ce so eee nace on oo np eee yi de DO ollojooooaoooop o noo 00 E E a Figure 1 Switch amp Jumper Locations CM310 Quad Serial utilityModule 8 RTD Embedded Technologies Inc Default Settings The utilityModule is delivered from the factory configured according to the following table Table 1 Default Jumper Settings Jumper Setting JP1 Not Installed Interrupts Disabled for 1 COM port G jumper Installed 1K pull down resister on IRQ4 line JP2 Not Installed Interrupts Disabled for 2 COM port G jumper Installed 1K pull down resister on IRQ3 line JP3 Not Installed Interrupts Disabled for 3 COM port G jumper Installed 1K pull down resister on IRQS line JP4 Not Installed Interrupts Disabled for 4 COM port G jumper Installed 1K pull down resister on IRQ10 line JP5 2 3 installed 1 8432 MHz input clock is selected CLK jumper SW1 All down T O base addresses at 3E8 2E8 280 288 for 1 2 23 and 4 COM port respectively SW2 1 4 up 5 8 down All ports in RS232 mode SW3 All up sw4 All up CM310 Quad Serial utilityModule 9 RTD Embedded Technologies Inc Descriptions The following table describes th
14. OM port That is assuming that X in hex is the first enabled COM port base address which can be any of the valid addresses listed in the Com Port Address Table the base address for the common registers is Y in hex then Y X 800h For example if the switches of SW4 are set all DOWN position which makes CN3 3E8h CN4 2E8h CNS 280h and CN6 288h then according to the algorithm the common registers base address BA will be the following depending the setting of enable switch SW2 for each serial port If CN3 is enabled then BA 3E8h 800h BE8h Else if CN3 is disabled AND CN4 is enabled then BA 2E8h 800h AESh Else if CN3 and CN4 are disabled AND CNS is enabled then BA 280h 800h A80h Else if CN3 CN4 and CNS are disabled AND CN4 is enabled then BA 288h 800h A88 A80h Else if CN3 CN4 CN5 and CN6 are disabled then Common Registers are disabled End If CM310 Quad Serial utilityModule 20 RTD Embedded Technologies Inc Common Register definitions BA 0 Interrupt Status Read Only 7 6 5 4 3 2 1 0 Reserved Reserved TxRDY RxRDY CN6 CN5 CN4 CN3 For each CNx bit 0 Not interrupting 1 Interrupt set TxRDY 0 indicates a buffer ready for at least one of the four transmit channels 1 indicates that all transmit buffers are full RxRDY 0
15. S OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND RTD Embedded Technologies EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED HEREIN ALL IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES FOR MECHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THIS WARRANTY IN THE EVENT THE PRODUCT IS NOT FREE FROM DEFECTS AS WARRANTED ABOVE THE PURCHASER S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE UNDER NO CIRCUMSTANCES WILL RTD Embedded Technologies BE LIABLE TO THE PURCHASER OR ANY USER FOR ANY DAMAGES INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES EXPENSES LOST PROFITS LOST SAVINGS OR OTHER DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS AND SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE CM310 Quad Serial utilityModule 26 RTD Embedded Technologies Inc CM310 Quad Serial utilityModule RTD Embedded Technologies Inc 103 Innovation Blvd State College PA 16803 0906 USA Our website www rtd com 27 RTD Embedded Technologies Inc
16. Setting 13 14 Installed 13 14 Removed 13 14 Removed 13 14 Removed IRQ10 for 1 COM port 1K pull down resister added on IRQ10 from PORTI IRQ10 for 2 COM port No pull down resister added on IRQ10 from PORT2 IRQ10 for 3 COM port No pull down resister added on IRQ10 from PORT3 IRQ10 for 4 COM port No pull down resister added on IRQ10 from PORT4 Table 12 Jumper Settings for interrupt sharing Case 2 J umper JP1 G jumper JP2 G jumper JP3 G jumper JP4 G jumper Diagnostic Software Setting 5 6 Installed 5 6 Removed 13 14 Installed 13 14 Removed IRQS for 1 COM port 1K pull down resister added on IRQ5 from PORT 1 IRQS for 2 COM port No pull down resister added on IRQ5 from PORT2 IRQ10 for 3 COM port 1K pull down resister added on IRQ10 from PORT3 IRQ10 for 4 COM port No pull down resister added on IRQ10 from PORT4 The companion CD for the utilityModule includes a menu driven diagnostic program Loop back plugs are required to run this program CM310 Quad Serial utilityModule 23 RTD Embedded Technologies Inc Power Protection Circuitry To reduce the risk of damage due to power supply problems the utilityModule includes several protective components Module Power Supply Protection The utilityModule includes a component to help prevent damage due to problems with the 5Vdc power supply from the PC 104 bus Protection is provided for e Over current e
17. a registered trademark of RTD Embedded Technologies cpuModule and utilityModule are trademarks of RTD Embedded Technologies PhoenixPICO and PheonixPICO BIOS are trademarks of Phoenix Technologies Ltd PS 2 PC XT PC AT and IBM are trademarks of International Business Machines Inc MS DOS Windows Windows 95 Windows 98 and Windows NT are trademarks of Microsoft Corp PC 104 is a registered trademark of PC 104 Consortium All other trademarks appearing in this document are the property of their respective owners CM310 Quad Serial utilityModule 3 RTD Embedded Technologies Inc Table of Contents CHAPTER T INTRODUCTION cicissesscssctsissciectessscssssossassosusssctesoussesenscoscesetosssessedsulecededvedesscadacseseocessosscascensosedsase 6 CM310 QUAD SERIAL PORT UTILITYMODULE 200000500005550000 NEE 6 CONFIGURING THE UTILITY MODULE 24324823 doles KAN NG Ka a a di pa an T CHAPTER 2 INSTALLING THE UTILITYMODULE occccononccoonnnncconnnnccnonococonanocconarnccconnnccccnanocccoanoccccnnncccons 13 RECOMMENDED PROCEDURE 0 enana 13 FINDING PIN T OFCONNECTORS ay a 13 PC 104 BUS CONNECTORS CN1 AND CN2 0001111100000 aa 15 FIRST COM PORT UN saa ANA NANA a add ma dt da dd na lands hasan 16 RS232 SERIAL PORT DEFAULT tas 17 RS422 OR RS4SS SERA cada 18 SEGOND COM PORT O NA aa a a NAA a E PLAN a a aa al 19 THIRD COM PORT EN Ni is 19 FOURTH COM PORT ON O A i 19 CM310 COMMON REGISTERS A ges eves os a NGA Da PEN E END bs 20 CHAPTER3 USING THE
18. ctor PC 104 AT Bus Connector CN2 Pin Row C Row D 0 OV OV 1 SBHE MEMCS16 2 LA23 1OCS16 3 LA22 IRQ10 4 LA21 IRQ11 5 LA20 IRQ12 6 LA19 IRQ15 7 LA18 IRQ14 8 LA17 DACKO 9 MEMR DRQO 10 MEMW DACKS5 11 SD8 DROQS 12 SD9 DACK6 13 SD10 DRQ6 14 SD11 DRQ6 15 SD12 DRQ7 16 SD13 5V 17 SD14 MASTER 18 SD15 OV 19 KEYING PIN OV Note Two locations on the bus have mechanical keying pins to help prevent misconnection of the PC 104 bus These keying pins are a part of the PC 104 standard and we strongly recommend you leave them in place If you have other modules without keying pins we suggest you modify them to include keying First COM port CN3 The first serial port is implemented on connector CN3 It can be configured as a PC compatible full duplex RS232 port or as half or full duplex RS422 or RS485 through mode SW3 The I O address is configurable in respect to SW1 address table and corresponding interrupt is also selectable through jumper JP1 to be IRQ3 IRQ4 IRQ5 IR6 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 IRQ14 and IRQ15 But you need to make sure that there are no resource conflicts on the I O base address and interrupt line you choose The serial port is implemented with a 16C550 compatible UART Universal Asynchronous Receiver Transmitter This UART is capable of baud rates up to 115 2K CM310 Quad Serial utilityModule 16 RTD Embedded Technologies Inc RS232 Serial Port Default The full du
19. e functions of the jumpers Table 2 Switch and Jumper tables IRQ selection for 1 COM Port CN3 G setting jumper installed 1K pull down resistor for the selected IRQ Jumper removed no pull down for the selected IRQ IRQ selection for 2 COM Port CN4 G setting jumper installed 1K pull down resistor for the selected IRQ Jumper removed no pull down for the selected IRQ IRQ selection for 3 COM Port CN5 G setting jumper installed IK pull down resistor for the selected IRQ Jumper removed no pull down for the selected IRQ IRQ selection for 4 COM Port CN6 G setting jumper installed 1K pull down resistor for the selected IRQ Jumper removed no pull down for the selected IRQ Input clock selection for serial ports 1 2 select 24 MHz input clock to UART 2 3 select 1 8432 MHz input clock to UART I O base address switch See Base Address Table for details Up enable serial port Positions Down disable serial port 1 4 Switch position Port 1 CN3 2 CN4 3 CNS 4 CN6 Sw2 Up RS422 485 mode Positions Down RS232 mode 5 8 Switch position Port 5 CN3 6 CN4 7 CNS 8 CN6 Up Don t use on board serial termination resistor Down Use 120 on board serial termination resistor for RS422 485 mode Switch position Port and signal 1 CN3 RxD 2 CN3 CTS 3 CN4 RxD 4 CN4 CTS CM310 Quad Serial utilityModule 10 RTD Embedded Technologies Inc Up Don t use on board serial termination resistor
20. ge PA 16803 0906 USA CM310 Quad Serial utilityModule 25 RTD Embedded Technologies Inc Limited Warranty RTD Embedded Technologies Inc warrants the hardware and software products it manufactures and produces to be free from defects in materials and workmanship for one year following the date of shipment from RTD Embedded Technologies INC This warranty is limited to the original purchaser of product and is not transferable During the one year warranty period RTD Embedded Technologies will repair or replace at its option any defective products or parts at no additional charge provided that the product is returned shipping prepaid to RTD Embedded Technologies All replaced parts and products become the property of RTD Embedded Technologies Before returning any product for repair customers are required to contact the factory for an RMA number THIS LIMITED WARRANTY DOES NOT EXTEND TO ANY PRODUCTS WHICH HAVE BEEN DAMAGED AS A RESULT OF ACCIDENT MISUSE ABUSE such as use of incorrect input voltages improper or insufficient ventilation failure to follow the operating instructions that are provided by RTD Embedded Technologies acts of God or other contingencies beyond the control of RTD Embedded Technologies OR AS A RESULT OF SERVICE OR MODIFICATION BY ANYONE OTHER THAN RTD Embedded Technologies EXCEPT AS EXPRESSLY SET FORTH ABOVE NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIE
21. plex RS232 mode is the default setting on the utilityModule With this mode enabled connector CN3 must be connected to RS232 compatible devices The following table gives the connector pinout and shows how to connect to an external serial connector either DB25 or DB9 compatible Connector CN3 in RS 232 Mode Table 7 Connector CN3 in RS 232 Mode I CN3 Pin Signal Function In out DB25 DB9 1 DCD Data Carrier Detect In 8 1 2 DSR Data Set Ready In 6 6 3 RXD Receive Data In 3 2 4 RTS Request To Send Out 4 7 5 TXD Transmit Data Out 2 3 6 CTS Clear To Send In 5 8 7 DTR Data Terminal Ready Out 20 4 8 RI Ring Indicate In 22 9 9 10 GND Signal Ground 7 5 Facing the connector pins the pinout is pictured in the following Table 8 Connector CN3 in RS 232 Mode II 9 7 5 3 1 GND DTR TXD RXD DCD GND RI CTS RTS DSR 10 8 6 4 2 CM310 Quad Serial utilityModule 17 RTD Embedded Technologies Inc RS422 or RS485 Serial Port You can change the mode switch to set the first port as RS422 or RS485 In this case you must connect CN3 to an RS422 or RS485 compatible device When using RS422 or RS485 mode you can use the port in either half duplex two wire or full duplex four wire configurations For half duplex 2 wire operation you must connect RXD to TDX and connect RXD to TXD Note A 120 ohm termination resistor is provided on the utilityModule Termination is u
22. sually necessary on all RS422 receivers and at the ends of the RS485 bus If the termination resistor is required it can be enabled by closing corresponding bits on SW3 or SW4 RS422 and RS485 Mode Pinout The following table gives the pinout of connector CN3 when RS422 or RS485 modes are enabled Table 9 Connector CN3 in RS422 485 Mode I CN3 Pin Signal Function In out DB9 1 RTS Request to send Out 1 2 RTS Request to send Out 6 3 RXD Receive Data In 2 4 TXD Transmit Data Out 7 5 TXD Transmit Data Out 3 6 RXD Receive Data In 8 7 CTS Clear to send In 4 8 CTS Clear to send In 9 9 10 GND Signal Ground 5 Facing the connector pins the pinout is pictured in the following Table 10 Connector CN3 in RS422 485 Mode ID 9 7 5 3 1 GND CTS TXD RXD RTS GND CTS RXD TXD RTS 10 8 6 4 2 CM310 Quad Serial utilityModule 18 RTD Embedded Technologies Inc Notes on using RS422 or RS485 Modes When using the serial port in RS422 or RS485 mode the serial receiver is always enabled however the serial transmitter is enabled and disabled under software control in the following two ways By default the transmitter is enabled by manipulating the Request To Send RTS signal of the serial port controller This signal is controlled by writing bit 1 of the Modem Control Register MCR as follows e IfMCR bit 1 1 then RTS
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