CM17320HR User`s Manual - RTD Embedded Technologies, Inc.
Contents
1. Send RTS signal of the serial port controller This signal is controlled by writing bit 1 of the Modem Control Register MCR as follows Page 19 of 26 e f MCR bit 1 1 then RTS 0 and serial transmitter is disabled e If MCR bit 1 0 then RTS 1 and serial transmitter is enabled If you are using the RS 485 inverted RTS driver enable mode these settings will be reversed as follows e f MCR bit 1 1 then RTS 0 and serial transmitter is enabled e f MCR bit 1 0 then RTS 1 and serial transmitter is disabled If you are using the handshaking signals in RS 422 485 mode the serial receiver for CTS clear to send is always enabled and the serial transmitter for RTS request to send is always enabled The exact software method for toggling RTS will depend on your operating system Consult your operating system s programming documentation for information on how to do this NOTE Many serial communication programs e g Windows HyperTerminal do not assert RTS while transmitting When using these programs make sure jumper that enables the transmitters all the time is installed If using a multi drop bus such as RS485 the software will have to be modified to toggle RTS to enable the transmit drivers Interrupts Since the CM17320HR is a PCI device it is capable of sharing interrupts with other PCI devices Interrupt sharing is a normal part of PCI operation and a required part of the PCI specification N2. 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 WARRANTIES 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
3. 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 Page 26 of 26
4. Closed 120 Ohm Termination B A Open Open Open Close Close Open Close Close Mode RS 232 Default RS 485 RTS driver enable RSS SONRISA cie maltes RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Open No termination default Closed 120 Ohm Termination B A Mode Open Open RS 232 Default Open Close RS 485 RTS driver enable Close Open RS 485 RTS inv driver enable Close Close RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Open No termination default Closed 120 Ohm Termination B A Mode Open Open RS 232 Default Open Close RS 485 RTS driver enable Close Open RS 485 RTS inv driver enable Close Close RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Open No termination default Closed 120 Ohm Termination B A Mode Open Open RS 232 Default Open Close RS 485 RTS driver enable Close Open RS 485 RTS inv driver enable Close Close RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Page 15 of 26 Fifth serial port CTS termination in RS 422 485 Sixth serial port mode Sixth serial port RxD termination in RS 422 485 Sixicln S O CS termination in RS 422 485 Seventh serial port mode Seventh serial port RxD termination in RS 422 485 Seventh serial port CTS termination in RS 422 485 Eighth serial port mode Eighth serial port RxD termina
5. section to more accurately indicate its purpose Added spec for External clock input Added second mode jumper to get RS 422 with drivers always enabled and RS 485 with inverted RTS driver enable modes in addition to RS 232 and RS 422 485 now just RS 485 mode with RTS driver enable modes Published by RTD Embedded Technologies Inc 103 Innovation Boulevard State College PA 16803 Copyright 2006 by RTD Embedded Technologies Inc All rights reserved The RTD Embedded Technologies Logo is a registered trademark of RTD Embedded Technologies dspModule cpuModule and utilityModule are trademarks of RTD Embedded Technologies PC 104 PC 104 Plus and PCI 104 are registered trademarks of the PC 104 Page 3 of 26 Consortium All other trademarks appearing in this document are the property of their respective owners Page 4 of 26 Table of Contents INTOAUCION aa o odian 7 PrOUCLO VEIA vi 7 Board FEATS tai Ao ies 7 VO Ide ace triana 7 Available Optom omita aiii 7 Getting Technical SUPPO Nica at tic tes 8 Hardware Descripti0N oooonoccccnnnoccconnnocccnnononccnnn corn cn cnn a a a a a 9 Block DiagraMiisicaida AA aida 9 Supported Baud Rates aiii ida 9 Board GOMNMOGUOMNS adi total EEEE 11 Connector and Jumper Locations ooononnccnnnccnnnnicnnccnnnncccnonn non r cnn nn cnn rca rn 11 User Oscillator UB iia A A A da 11 Serial Port Connectors CN4 CN11 ccoccccccccncncnonononononononononononononononononononononononononon
6. CM17320HR User s Manual Octal RS 232 422 485 PC 104 Plus Module O TUTO RTD Embedded Technologies Inc Real Time Devices Accessing the Analog World BDM 610020049 Rev E ISO9001 and AS9100 Certified CM17320HR 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 rtd com techsupport rtd com Web Site http www rtd com Page 2 of 26 Manual Revision History RevA Rev B Rev C 01 31 2008 Rev D 08 13 2008 Rev E 8 17 2009 New manual Added User Oscillator Added a section about supported baud rates Added a diagram of the User Oscillator Added information about COM port numbering in Windows Added section on COM port enumeration for application developers Added the IDAN CM17320 Dimensions and Pinout section which replaces the previously separate IDAN Manual IDM 650020032 Corrected the IDAN connector pinout which was listed incorrectly in IDM 650020032 rev A Added information about RTD pre installed User Oscillators Expanded the board block diagram to clarify the oscillator operation Renamed the jumper designations for the signal conditioning jumpers They now use the designations printed on the board silk rather than the JPxx designation from the schematic Improved the Connector and Jumper Locations diagram Changed the name of the RS 422 485 Transmitter control
7. Cable 4 ports To connect all 8 ports purchase two IDAN XKCM33s In addition to the above ordering options RTD can also provide the CM17320HR with various customizations e g conformal coating custom connectors soldered jumpers etc Contact RTD s sales department sales rtd com for more information Getting Technical Support If you are having problems with your system please try the following troubleshooting steps e Simplify the System Remove modules one at a time from your system to see if there is a specific module that is causing a problem e Swap Components Try replacing parts in the system one at a time with similar parts to determine if a part is faulty or if a type of part is configured incorrectly If problems persist or you have questions about configuring this product obtain the PCI BIOS listing information of the CM17320HR and other modules in the system After you have this information contact RTD Embedded Technologies via the following methods Phone 1 814 234 8087 E Mail techsupport rtd com Be sure to check the RTD web site http www rtd com frequently for product updates including newer versions of the board manual and application software Page 8 of 26 Hardware Description Block Diagram Exar Signal Conditioning XR17D158 Jumper Controlled PCI UART COM a RS 232 422 485 6 COM b RS 232 422 485 O 3 PCI COM c RS 232 422 485 8 2 COM d RS 232 422 485 V COMe RS 232 422 485
8. 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 Page 12 of 26 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 2 Connector CN4 in RS 232 Mode II 7 5 3 GND DTR TXD RXD DCD GND RI CTS RTS DSR 10 8 6 4 RS 422 RS 485 RTS RS 485 Inverted RTS Serial Port Modes When using RS 422 or RS 485 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 120 ohm termination resistors for the RxD and CTS signals are provided on the utilityModule Termination is usually necessary on all RS 422 receivers and at the ends of the RS 485 bus If the termination resistor is required it can be enabled by closing jumpers labeled R and C for the corresponding port For more information refer to the Jumper Settings table later in this chapter The following table gives the pinout of connector CN4 when RS 422 or RS 485 modes are enabled Table 3 Connector CN4 in RS 422 485 Mode 1 CN3 Pin Signal Function In out DB9 1 RTS Request to send Out 1 2 RT
9. S 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 Page 13 of 26 Facing the connector pins the pinout is pictured in the following table Table 4 Connector CN4 in RS 422 485 Mode II 5 3 1 AN TXD RXD RTS DER RXD TXD RTS 2 Second serial port CN5 Please refer to the previous section on the first COM port CN4 for the description Third serial port CN6 Please refer to the previous section on the first COM port CN4 for the description Fourth serial port CN7 Please refer to the previous section on the first COM port CN4 for the description Fifth serial port CN8 Please refer to the previous section on the first COM port CN4 for the description Sixth serial port CN9 Please refer to the previous section on the first COM port CN4 for the description Seventh serial port CN10 Please refer to the previous section on the first COM port CN4 for the description Eighth serial port CN11 Please refer to the previous section on the first COM port CN4 for the description Jumper Settings The following sections describe the jumper configuration options available on the CM17320HR For a reference that shows the location of each set of jumpers refer to the diagram of the CM17320HR at the beginn
10. ats of positions O 3 Figure 3 PCI Selector Rotary Switch PCI Board Selector Page 16 of 26 Board Installation Installing the Hardware The CM17320HR can be installed into a PC 104 Plus or PCI 104 stack lt can be located almost anywhere in the stack above or below the CPU as long as all PCI bus constraints are met Static Precautions Keep your board in its antistatic bag until you are ready to install it into your system When removing it from the bag hold the board at the edges and do not touch the components or connectors Handle the board in an antistatic environment and use a grounded workbench for testing and handling of your hardware Steps for Installing 1 Shut down the PC 104 Plus system and unplug the power cord 2 Ground yourself with an anti static strap 3 Set the PCI Slot Selector as described in the previous chapter 4 If any other PCI add on cards are to be included in the stack be sure that their PCI slot numbers are configured correctly Slot 0 for the board closest to the CPU Slot 1 for the next board etc 5 Line up the pins of the CM17320 s PC 104 and PC 104 Plus connectors with the corresponding bus connectors of the stack Make sure that both connectors are lined up 6 Apply pressure to both bus connectors and gently press the board onto the stack The board should slide into the matching bus connectors Do not attempt to force the board as this can lead to bent broken pins 7 If a
11. be either a 5 volt or 3 3 volt oscillator and is configured with jumper JP27 Jumper JP2 selects either the 14 7456 MHz oscillator or the user oscillator All serial ports use the same oscillator U3 pin 1 is Page 11 of 26 pulled high with a 10K ohm resistor to enable tri state oscillators The max frequency is 50MHz which will result in a max baud rate of 6 25Mbps User Oscillator U3 Pinout Pin 4 VCC Set by JP27 Pin 3 CLOCK Pin 1 OE Pin 2 GND Serial Port Connectors CN4 CN11 The following sections describe the external I O connections of the CM17320HR board For information on the I O connections for the IDAN version refer to the IDAN CM17320HRS section later in this manual First serial port CN4 The first serial port is implemented on connector CN4 It can be configured as a PC compatible full duplex RS 232 port full duplex RS 422 with drivers always enabled RS 485 with RTS driver enable or RS 485 with inverted RTS driver enable by the Mode A and B jumpers See Table 5 Jumper Settings for details RS 232 Serial Port Mode Default The full duplex RS 232 mode is the default setting on the utilityModule With this mode enabled connector CN4 must be connected to RS 232 compatible devices The following table gives the connector pinout and shows how to connect to an external serial connector either DB25 or DB9 Table 1 Connector CN4 in RS 232 Mode I CN4 Pin Signal Function In out
12. d Register Mapping The CM17320HR exposes all of the registers available on the Exar XR17D158 The register set of the XR17D158 mimics the standard 16C550 UART register map However the XR17D158 contains some additional registers not found in a typical ISA based UART Additionally the base address of the CM17320HR s serial ports will be different than the standard PC serial port locations 0x3F8 0x2F8 etc The CM17320HR is a memory mapped device Since it is PCl based it may be mapped to any location within the 4GB address space of the CPU The base address of PCI devices is determined by the CPU s BIOS and operating system at boot time The register level differences between the CM17320HR and a standard 16C550 UART should be abstracted via the software drivers Most users will not need to concern themselves with the actual registers of the board If one is interested in directly accessing the registers of the board consult the XR17D158 data sheet available from Exar Enabling the RS 422 485 Transmitter See Table 5 Jumper Settings for mode jumper settings When using the serial port in RS 422 or RS 485 mode the serial receiver for RxD receive data is always enabled In RS 422 mode the driver is always enabled however in RS 485 mode the driver for TxD transmit data is enabled and disabled under software control in the following two ways In RS 485 RTS driver enable mode the transmitter is enabled by manipulating the Request to
13. daa ad 21 Serial Port Program aa a a aaa aa Ea E a ai 21 Interrupt Program Ming ui E A AT 21 Exar XR17D158 PCI Bus Octal UART eener aeaa n aaa eaaa a heeki abane rioak aktak 21 CM17320HR Board Specifications ccccceceecceceeeeeeneeeeeeeecaeeeeeaeeeeeeeeeaeeesaaeeeeaeeseeeeeseaeessaeeeeneeee 22 Physical ATITIDUOS ua A a 22 Operating Condition ts 22 IDAN CM17320HRS Dimensions and Pinout 2 ceccceceeeeeeeeeeeeeeeeeeeeeaaeeeeaeeseeeeeseaeeesaeeneneeenaes 23 DAN Frame sesh cereus ias 23 IDAN Connectors iia te dee eas ae eed hla 24 37 pin D Female Connectors c cccccccecececeeeeeeeeneeceeeeeeaaeseeneeeeeeeesaaeseeaaeseaneeseeeeeaeeneaeeesees 24 Serial Ports 14 Froianit aa 24 Serial Ports Sg Back liviana sogenaesgundesassedue a e Ea aa r Aaa ro REES 25 mte Ward ii a ia NS 26 Page 6 of 26 Introduction Product Overview The CM17320HR is designed to provide eight independent PCI serial ports with RS 232 RS 422 or RS 485 interfaces for PC 104 Plus based systems Board Features o Eight versatile serial port interfaces Jumper selectable RS 232 RS 422 drivers always enabled RS 485 with RTS driver enable and RS 485 with inverted RTS driver enable operation Supports all standard RS 232 serial port signals RTS CTS etc Functionally compatible with standard PC 16C550 UARTs o Exar XR17D158 Octal PCI UART 32 bit PCI target 16C550 compatible 5G register set 64 byte transmit and receiv
14. e CM17320HR is installed in a system with more than two COM ports there may be overlap between the COM port numbers It may be necessary to re number the existing COM ports to avoid conflicts with the CM17320HR Consult the Windows driver documentation for more information Page 18 of 26 Software Programming API Interface Once the drivers for the CM17320HR have been properly loaded all eight RS 232 422 485 ports should be available as standard serial ports All eight ports can then be controlled using the standard serial port interfaces built into the operating system A description of serial port programming for operating systems is beyond the scope of this manual Consult the operating system documentation for information on how to interface with serial ports via software COM Port Numbering Serial ports aka COM ports are typically assigned numbers by the operating system e g COM1 These numbers are typically dynamically assigned by the operating system However different applications may enumerate the COM ports differently assigning different port numbers e g COM3 10 vs COM5 12 When developing your own serial port application consult your operating system s documentation for the proper method of enumerating COM ports Note Some applications are written to assume that no more than four COM ports are present in a system These applications may have compatibility issues with the Exar PCI UART Base Address an
15. e FIFOs Programmable date rate with prescaler 14 7456 MHz crystal Standard PC serial port baud rates supported Up to 921 600 baud RS 422 485 prescaler 1 Up to 230 400 baud RS 232 prescaler 4 o User oscillator option Enables support for non standard baud rates up to 6 25 Mbps 43 3 Vor 5 V Oscillators 50 MHz max 8 pin DIP package 4 pins used Board may be ordered with a custom oscillator preinstalled o PC 104 Plus compliant Universal 3 3V or 5 0V PCI signaling I O Interfaces o Eight 10 pin DIL serial port connectors 0 1 Pin Spacing Can be cabled directly to a 9 pin D connector o PC 104 Plus PCI stack through bus connector o PC 104 ISA stack through bus connector Available Options The CM17320HR may be purchased as either a board level product or as an IDAN module for integration into an RTD IDAN system Cable kits are also available Part Number Description CM17320HR Octal Serial Port Peripheral Module CM17320HR xxx xxxMHz CM17320HR with pre installed oscillator for custom baud rates xxx xxx specifies the frequency Page 7 of 26 XK CM30 Quad Serial Port Cable Kit To connect all 8 ports purchase two XK CM30s IDAN CM17320HRS CM17320HR mounted in an IDAN frame May also specify a custom oscillator frequency IDAN CM17320HRS xxx xxxMHz IDAN CM17320HRS with pre installed oscillator for custom baud rates xxx xxx specifies the frequency IDAN XKCM33 IDAN Multi Serial Port
16. e routines refer to the following book Interrupt Driven PC System Design By Joseph McGivern ISBN 0929392507 Exar XR17D158 PCI Bus Octal UART For detailed information about the Exar XR17D158 contact Exar at Web http www exar com Page 21 of 26 CM17320HR Board Specifications Physical Attributes Size Weight Power Consumption Operating Conditions Cooling Operating temperature range Storage temperature range Humidity 3 6 L x 3 8 W x 0 6 H 90mm L x 96mm W x 15mm H 0 24bs 0 10 Kg 2W 5 VDC Typical Convection 402 to 85 C 55 C to 125 C RH up to 95 non condensing Page 22 of 26 IDAN CM17320HRS Dimensions and Pinout IDAN Frame 000 2 009 2 117 O00 FRONT 304 669 REF PORTS 5 8 BACK al pE Pin 37 Note Drawings are not to scale Page 23 of 26 IDAN Connectors 37 pin D Female Connectors Connector Part Adam Tech DE37SD Mating Connector Adam Tech DE37PD Serial Ports 1 4 Front IDAN eae eee IDAN XKCM33 Cable Kit Pin RS 232 Signal RS 422 485 Signal Pin 9 Pin D Connector Male o D c9 PORT4s Data Set Ready a 0 i Q Q Q G D Data Set Ready CN7 2 0 Q G E Serial Port 4 N Transmit Data GND CN6 4 Clear To Send CN6 8 Request To Send Clear To Send CN5 6 PORT 2 8 Ring Indicator Clear To Send CN5 8 PORT 2 9 2 Se
17. eiver sampling of 16 the Baud Rate Generator divisor would be 14745600 4 115200 x 16 2 If the desired baud rate can not be expressed as a whole number divisor it may be necessary to use a different input clock This can be done with a User Oscillator A user specified oscillator can be installed in U3 The max frequency for the user oscillator is 50 MHz and the max baud rate for the chip is 6 25 Mbps Alternatively RTD can preinstall several common oscillator frequencies Page 10 of 26 Board Connections Connector and Jumper Locations The following diagram shows the location of all connectors and jumpers on the CM17320HR Future revisions of the CM17320HR may have cosmetic differences For a description of each jumper and connector refer to the following sections PC 104 Plus PCI Bus CN8 oi FR CN7 CN9 Je g LT CN6 CEN i J y E E 3 saral porn cs nis nad gt w 3 CN10 7 gri CN5 LEN oem i A 2 serial port HA A Hi 5 CN11 pre Be ee a E y 1 CN4 8 serial port El E E 1 serial port JP2 Oscillator Select Serial Port JP27 User Oscillator Power Signal Conditioning z 4 jumpers per port NEPE PE TOR US Mode A amp B Signaling Mode Slot Selector ISA Bus oe R RxD Termination C CTS Termination U3 User Oscillator Figure 2 CM17320 Connector and jumper locations User Oscillator U3 The board has a position for a half size 8 pin DIP user oscillator This device can
18. ing of this chapter The default factory jumper settings are listed in the following table Page 14 of 26 Jumper 4 CN4 CN5 CN6 CN7 CN8 1 JP2 Mode Mode Mode Mode Mode Mode Mode Mode Mode Mode Table 5 Jumper Settings EEPROM Bypass PCI bus 14 7456 MHz Oscillator or User Oscillator First serial port mode First serial port RxD termination in RS 422 485 First serial port CTS termination in RS 422 485 Second serial port mode Second serial port RxD termination in RS 422 485 Second serial port CTS termination in RS 422 485 Third serial port mode Third serial port RxD termination in RS 422 485 port CTS in RS 422 485 Third serial termination Fourth serial port mode Fourth serial port RxD termination in RS 422 485 Fourth serial port CTS termination in RS 422 485 Fifth serial port mode Fifth serial port RxD termination in RS 422 485 Function and Default Setting Factory 14 7456 for Normal operation default use only MHz default User Oscillator Note Be sure to set JP27 if using a User Oscillator B A Open Open Open Close Close Open Close Close Open Open No termination Closed 120 Ohm Termination No termination Mode RS 232 Default RS 485 RTS driver enable RS 485 RTS inv driver enable RS 422 drivers enabled default default
19. ny boards are to be stacked above the CM17320 install them 8 Attach any necessary cables to the PC 104 Plus stack 9 Re connect the power cord and apply power to the stack 10 Boot the system and verify that all of the hardware is working properly Note If multiple PCI devices are configured to use the same PCI slot number the system may not boot Installing the Software The CM17320HR uses a PCl based UART not the standard ISA based UART found in most PC motherboards Therefore it may be necessary to install software before the board will be recognized by the operating system RTD provides drivers for several popular operating systems This software is provided on disk with the board and is also available for download from the RTD web site http www rtd com Page 17 of 26 Note Before installing any drivers it is recommended that you visit the RTD web site to check for a newer version The actual procedure for installing the software will depend on the operating system Consult the documentation provided with the software for installation instructions Once the drivers are installed all eight ports should be available as standard serial ports a k a COM ports to the operating system At that point application software should be able to access and control the serial ports Note When the CM17320HR is installed under Windows it typically uses a contiguous set of COM port numbers e g COM3 COM10 If th
20. ononononononononononos 12 First seriall port GN amp 4 iii A ida bind 12 RS 232 Serial Port Mode Default ooonoccinncncnncccnncccnnocnnonoccconcncnnnnnanonnnnnn cnc acc nan rnnnnnnnnnnnnnns 12 RS 422 485 Serial Port Mode ooooccoccccocociconocanonoccconcnnnoncna nono cnc cnn nn naar nana c narra narran nana nnnncins 13 Second seral porn EN a Ada 14 Third Serial port GNG dcir id da A did A 14 Fourth seriall port CNF uio a dadas 14 Fifth serial port ONB ssdeccsissclessasccevedeadud asad odcaasanndescaicdsecdessudeaenssdeecdanvadeasabscsdadensudeaseasedacaeneadea 14 SIXtM SS rial POM END E aia ada 14 Seventh serial POE Di a ded area 14 Ejghth serial port GNT T ra aaia aaa aaan anaa aa aaa aa aa ta aA kgeenvighestadaiadeasaschestadi ETEei 14 JUMPERSCHINOS iu en a a aaa a ida 14 PCl Board Selectors Will E ETE as 16 Board Installation a ide epee eevee 17 Installing the Hardware cccccccsecccceeeeeceeeeneeceeeeseeceeesaeeaeeesaeeaeeesaeeaeeesaeacaeeseeeaeesneeaeeesneeaeenenees 17 Static PLOCAUTIONS dadas 17 Steps for Install tacna tail 17 Page 5 of 26 Installing the Softwares iia ta 17 Software Programming iii tad 19 APLICO A a 19 COM Port Numbering tiara ad 19 Base Address and Register Mapping omoccccnonocccinonocccononoccconanonccnnn noc cn nn rca nn cnc 19 Enabling the RS 422 485 TransMitlOl oooconocinnncconnccnncccncncnnoncnnnnnrccnnrcnn anna 19 IO A A Sa A A Ae el ee ea 20 Additional INfOTMAtION coda
21. ote that any Interrupt Service Routines developed for the CM17320HR must be properly written to support interrupt sharing The CM17320HR uses one PCI interrupt for all eight serial ports The actual IRQ number will be set by the CPU s BIOS and operating system at boot time Since the XR17D158 has all the capabilities of a standard 16C550 UART it supports all of the standard serial port interrupt events However it will not actually generate interrupts unless the Interrupt Enable Register has been properly programmed for each port Supported interrupt events include e Received data available e Transmit buffer empty e Line Status Register change e Modem Status Register change A detailed explanation of serial port interrupts is beyond the scope of this manual For more information consult a serial port programming reference Note When the UART clock is running at a higher frequency transmit receive interrupts will happen more frequently Many operating systems can not process interrupts quickly enough to handle this load When developing your software be sure to consider the operating system s limitations Page 20 of 26 Additional Information Serial Port Programming For more information about programming serial port UARTs consult the following book Serial Communications Developer s Guide By Mark Nielson ISBN 0764545701 Interrupt Programming For more information about interrupts and writing interrupt servic
22. rial Port 2 Serial Port 3 CN4 1 CN4 5 CN4 9 CN4 4 CN4 8 19 NIC Page 24 of 26 D 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 Serial Port 1 1 0 1 2 3 4 5 6 7 8 7 10 11 12 13 14 9 0 1 2 3 4 5 6 7 15 16 17 18 ESTE EEN en E a AAN ae EE EAN MA PEE ee ez EN on EE 13 ES EA 30 31 32 es aa EA E Ea AE Tees E cm ESA Serial Ports 5 8 Back IDAN CM17320 IDAN XKCM33 Cable Kit Pin RS 232 Signal RS 422 485 Signal Pin 9 Pin D Connector Male Request To Send CN11 1 PORT 8 1 Receive Data Receive Data CN11 3 PORT 8 2 Transmit Data CN11 5 PORT 8 3 N11 9 Transmit Data Transmit Data Transmit Data GND ND Serial Port 8 Transmit Data Data Set Ready oD D CN PORT 6 5 it Data Clear To Send CN9 6 PORT 6 8 a Serial Port 6 Serial Port 7 Transmit Data Transmit Data 19 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 Serial Port 5 1 0 1 2 3 4 5 6 7 8 7 10 11 12 13 14 9 0 1 2 3 4 5 6 7 15 16 17 18 Page 25 of 26 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
23. st COM f RS 232 422 485 O a COM g RS 232 422 485 COM h RS 232 422 485 UART Input 14 7456 MHz Clock E Oscillator ial User Oscillator Oscillator Select U3 Jumper JP2 Figure 1 CM17320 Block Diagram Supported Baud Rates CN4 CN5 CN6 CN7 CN8 CN9 CN10 CN11 5V U3 VCC E 3 3V User Oscillator Power Jumper JP27 When using the standard 14 7456 MHz oscillator the CM17320HR supports the standard baud rates of PC serial port e g 2400 9600 19 2k etc The CM17320HR can also support non standard baud rates via a User Oscillator The baud rate of a serial port is set by dividing the input clock typically 14 7546MHz For the Exar XR17D158 there are two dividers to specify First is the Prescaler MCR Bit 7 divides the input clock by either 1 or 4 Second is the Baud Rate Generator which further divides the frequency further to achieve the desired baud rate The Baud Rate Generator can be set to a value between 1 and 2 1 Page 9 of 26 Note For more information on programming the Prescaler and Baud Rate Generator consult the XR17D158 datasheet The Baud Rate Generator divisor can be calculated by one of the following equations depending on sampling of receiver of 8 or 16 Divisor INPUT_CLOCK PRESCALER DESIRED_BAUD_RATE x 16 or Divisor INPUT_CLOCK PRESCALER DESIRED_BAUD_RATE x 8 For example if one wants to use a baud rate of 115 2K Prescale divisor of 4 and rec
24. tion in RS 422 485 mode Eighth serial port CTS termination in RS 422 485 mode User Oscillator source selectio PCI Board Selector SW1 Function and Default Setting Open No termination default Closed 120 Ohm Termination B A Mode Open Open RS 232 Default Open Close RS 485 RTS driver enable Close Open RS 485 RTS inv driver enable Close Close RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Open No termination default Closed 120 Ohm Termination B A Mode Open Open RS 232 Default Open Close RS 485 RTS driver enable Close Open RS 485 RTS inv driver enable Close Close RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Open No termination default Closed 120 Ohm Termination B A Mode Open Open RS 232 Default Open Close RS 485 RTS driver enable Close Open RS 485 RTS inv driver enable Close Close RS 422 drivers enabled Open No termination default Closed 120 Ohm Termination Open No termination default Closed 120 Ohm Termination 1 2 5V default 2 3 3 3V The CM17320HR uses a rotary switch to select the PCI slot Before you can use this module you have to set the PCI board selector switch The procedure is if this module is the first module from the CPU module select 0 if it is the second module select 1 etc Positions 4 7 are simply repe
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