B&B Electronics DSC-200/300IND
Contents
1. Figure 27 DSC 200 300 output connectors Ouatech DSC 200 300 User s Manual 35 9 PCI Resource Map Listed below are the PCI resources used by the DSC 200 300 Such information may be of use to customers writing their own device drivers or other custom software A detailed description of the DSC 200 300 s UARTs is available on the Quatech web site all numbers in hex PCI Vendor ID 0x135C Quatech Inc PCI Device ID 0x0030 DSC 200 300 PCI Class Code Base class 0x07 Simple communications controller Subclass 0x02 Multiport serial controller Interface 0x00 IRQ sourced by INTA Base address 0 0x80 bytes I O Reserved region Base address 1 Ox10 bytes I O Serial ports Port 1 at offset 0x00 Port 2 at offset 0x08 Ouatech DSC 200 300 Users Manual 36 10Specifications Bus interface Dimensions Serial ports Controller Interface Transceivers Differential output Output rise fall time Differential input Threshold Input resistance Input current Power requirements 5 volts Temperature Humidity PCI 32 bit bus 5 volt only IBM compatible computers approx 5 5 x 3 5 16750 with 64 byte FIFOs Two female D 9 connectors SP491 or compatible 2V min with 50 ohm load RS 422 1 5V min with 27 ohm load RS 485 3ns min 40ns max 15ns typ 0 2V min 0 2V max 12k ohm min 15k ohm typ 1 0mA max approx 320 mA operating 0 to 70 storage 50 to 80 102. to 90 Quatech DSC 200 300 User s Manual 37 11 Troubleshooting Listed here are some common problems and freguent causes of those problems If the information here does not provide a solution contact Quatech technical support Any unauthorized repairs or modifications will void the DSC 200 300 s warranty Computer will not boot up 1 3 Is the DSC 200 300 properly inserted Remove the card and try again Perhaps try a different expansion slot Ensure that an ISA bus card is not using the same IRQ that the PCI BIOS tries to assign to the DSC 200 300 Most computers have BIOS setup options to reserve IRQs for either ISA or PCI use Try reserving the IRQ for the ISA card The BIOS will automatically choose a different IRQ for the DSC 200 300 An address conflict is unlikely because most PCI based computers will assign I O addresses in such a way that they cannot conflict with ISA bus devices The DSC 200 300 may be defective Contact technical support for instructions Cannot communicate with other equipment 1 2 Are the cable connections correct Are the cables securely attached Is the software configured with the correct base address and IRQ information for the DSC 200 300 This is mainly a DOS issue Is the device driver installed If you are trying to communicate with another DTE a null modem cable will be required If possible use a loopback connector to test the port Ouatech DSC 200 300 User s M
3. 1 IND Option Surge Suppression Upgrade 8 2 Hardware Configuration 9 2 1 RS 422 or RS 485 Signal Line Termination 9 2 2 Signal ConnecHons ses esate EE REDE hers Po ene etiam 10 2 3 Full duplex Half duplex Operation 10 2 4 Clock Rate and Optional Registers 11 2 4 1 Enable Scratchpad Register SPAD J13 11 2 4 2 Force High Speed UART Clock X2 X4 or X8 sip ee coe va SG a AE EA darker Ee GR Gee 12 3 Hardware Installation 00 13 4 Address Map and Special Registers 14 4 1 Base Address and Interrupt Level IRQ 14 4 2 Enabling the Special Registers 15 4 3 Interrupt Status Register 0 0 eee ee 15 4 4 Options Register n os SERS Ket erar d Ded pa nse 16 4 4 1 Enhanced Serial Adapter Identification 16 4 4 2 Clock Rate Multiplier i ou EER IRE rade eas 17 5 Windows Configuration eee 18 5 1 Windows Millennium eese 18 5 2 Windows 2000 aves pa us bete bor US Mats 19 5 9 Windows 0B ocio te BY PERTENECER 20 54 Windows 95 quiero undo iia eS NT n ima rt escas 21 5 5 Using the New Hardware Found Wizard 23 5 5 Windows NE eien tiam tV EIU Re eL nta ED Eie 24 6 DOS and Other Operating Systems 25 6 D I ODPOCLEXE sr sesse SE Se dao qu ed es Be ef se 25 0 EE 28 8
4. DSC 200 300 is not a direct drop in replacement for a legacy serial port because its base address and IRO cannot be fixed at values such as 3F8 hex IRO 4 COM1 or 2F8 hex IRO 3 COM2 etc Rather the system BIOS assigns the address and the IRQ in a plug and play fashion at boot time Software which is to use the DSC 200 300 must be able to accommodate any valid assignments of these resources For Windows and OS 2 the Quatech device drivers determine what the resource assignments are and proceed accordingly In other cases however the user must intervene The discussion below will center on DOS but the concepts can be applied to other operating systems as well Many DOS applications support user configuration of the base address and IRQ of a serial port Such applications can generally make use of the DSC 200 300 Older applications as well as some custom software may use hard coded standard legacy serial port addresses These applications will require modifications to support PCI devices Custom applications for which the customer has source code can be modified to make just a few PCI BIOS function calls to obtain all the necessary configuration information The PCI BIOS specification can be obtained from the PCI Special Interest Group Contact Quatech technical support for more information 6 1 1 OTPCLEXE Quatech s OTPCI utility supplies the information required when modifying the serial port settings of the application This program
5. I O locations The two ports reside in a single block of I O space in eight byte increments for a total of 16 contiguous bytes as shown in Figure 7 I O Address Range Base Address 0 to Base Address 7 Base Address 8 to Base Address 15 Figure 7 Port Address Map All two serial ports share the same IRQ The DSC 200 300 signals a hardware interrupt when any port requires service The interrupt signal is maintained until no port requires service Interrupts are level sensitive on the PCI bus The base address and IRO are automatically detected by the device drivers Quatech supplies for various operating systems For cases where no device driver is available such as for operation under DOS Quatech supplies the QTPCI DOS software utility for manually determining the resources used See page 17 for details Ouatech DSC 200 300 Users Manual 14 4 2 Enabling the Special Registers The DSC 200 300 contains two unique registers an Interrupt Status Register and an Options Register These registers are enabled when the SPAD jumper J13 is removed factory default They replace the UART Scratchpad Register on accesses to register address 7 The Interrupt Status Register and Options Register are accessed through the scratchpad location of any UART The DLAB bit of the UART Line Control Register bit 7 is used to select between the two registers The most recent write of a DLAB bit in any UART selects between the two registers as
6. four differential communication signals per channel The two output signals are Transmit Data TxD and Auxiliary Output AUXOUT The two input signals are Receive Data RxD and Auxiliary Input AUXIN A ground signal is also provided The available input signals for AUXIN are Clear To Send CTS and the Receive Clock RCLK The available output signals for AUXOUT are Request To Send RTS the Transmit Clock XCLK and the AUXIN signal for loopback Either half duplex or full duplex operation can be selected for each communications channel If half duplex operation is selected one of the UART s signals either DIR or RTS is used to enable the transmitter drivers The inverse of the transmitter enable can be used to enable the receiver drivers Factory installed resistors allow for signal line termination in compliance with the RS 422 and RS 485 standards The desired termination can be selected or removed per port by applying a jumper Configuration is done using jumpers J1 through J4 for termination selection and jumpers J5 through J8 for interface signal routing Each jumper block provides the same functions for its particular channel Signal routing Ip Je Figure 17 Jumper Channel correspondence XCLK 6 C CO 3 RCLK J umpers J 5 7 auxouT 5 CO 2 auxin RSs 4 O O 1 cts Tx ENABLES 3 Rx ENABLE Jumpers 6 8 Tx ENABLES 2 2 RTS Half duplex Tx ENABLE4 Q d 1 DIR if 3 6 shorted Figure 18 Pinout of ju
7. hardware buffers FIFOs which reduce processing overhead and allow higher data rates to be achieved The 16750 contains a 64 byte FIFO and can transmit and receive data at a rate of up to 921 600 bits per second The 16750 is recommended for heavy multitasking environments and for applications involving high data rates The DSC 200 300 is supported under several popular operating systems and environments Contact the sales department for details on current software offerings Most device drivers are available for download from the Quatech world wide web site at http www quatech com Quatech DSC 200 300 User s Manual 7 1 1 Features The standard DSC 200 300 implements each of its communication channels with a 16750 UART and uses standard line driver and receiver components For improved performance and industrial grade reliability 1 1 1 IND Option Surge Suppression Upgrade The IND upgrade provides the protection essential for reliable use in an industrial environment Each communication line has a surge suppressor capable of sustaining up to 40A 20us peak transient surges a clamping voltage of 30V and a peak energy dissipation of 0 1 Joules Quatech DSC 200 300 User s Manual 8 2 Hardware Configuration The DSC 200 300 is automatically configured at boot time by the computer s BIOS or operating system There are no reguired switches or jumpers to set for installation This chapter lists a number of jumper settings that cont
8. is the output clock signal used by the transmitter portion of the UART It is generally connected to the UART s own receive clock input RCLK This is done by connecting pins 3 and 6 of the jumper block If desired XCLK can be transmitted to an external source over the AUXOUT line by connecting pins 5 and 6 of the jumper block Figure 21 shows how to select the XCLK mode Jumpers J 5 7 XCLK e 3 RCLK xcix 6 ll 3 rcik auxouT 5 C 2 AUXIN AUXOUT 5 _ CO 2 AUXIN Rts 4 O 1 cts Rts 4 OO 1 crs Loopback XCLK to RCLK Transmit XCLK on AUXOUT Figure 21 XCLK selection 8 4 AUXIN AUXOUT Loopback The AUXIN signal is an input from the external device and connecting it to the AUXOUT signal provides for a loopback mode of operation In other words whatever signal is transmitted by the external device over the AUXIN line will be fed back to the external device over the AUXOUT line This mode is accomplished by connecting pins 2 and 5 of the jumper block Figure 22 shows how to select this loopback mode J umpers J 5 7 XCLK 6 3 RCLK auxouT 5 2 AUXIN RTS 4 O QQ 1 cr Loopback AUXOUT to AUXIN Figure 22 AUXIN AUXOUT loopback Quatech DSC 200 300 User s Manual 31 8 5 Half Duplex Full Duplex Selection Using jumper blocks J6 and J8 the transmitters and receivers of each channel can be enabled and disabled by modem control signals This allows operation in both half duplex or full duplex mode
9. should be run from real DOS not in a Windows DOS box Figure 15 shows the Basic Mode display for the DSC 200 300 after the Q key has been pressed In this example the DSC 200 300 uses I O base address FFAO hex and IRQ 3 The hardware revision of the DSC 200 300 is also displayed Pressing the N key will show similar information for all non Quatech PCI devices in the system including those devices integrated on the motherboard Ouatech DSC 200 300 User s Manual 25 The OTPCI program is capable only of displaying the PCI configuration It cannot be used to make changes Quatech PCI Configuration Information Display Software Version 1 00 INSTRUCTIONS Press keys listed in the menu at the bottom of the screen This program only displays information It cannot make changes Numbers preceeded by Ox are hexadecimal PCI BIOS detected version 2 10 Quatech PCI adapters detected DSC 200 300 Two port RS 422 485 adapter Hardware Revision A1 Uses IRQ 3 Base addr 1 Oxffa80 VO Q Quatech PCI adapters M Change to Expert Mode N Other PCI devices X EXIT Figure 15 QTPCI EXE Basic Mode display Figure 16 shows the Expert Mode display for the DSC 200 300 after the Q key has been pressed The information from the Basic Mode display is presented along with more details such as the Vendor and Device IDs PCI Class Code size of memory and I O regions etc Pressing the N key will show similar information for all Quat
10. shown in Figure 8 DLAB Bit SPAD Jumper Register selected for address 7 accesses Interrupt Status Register Options Register Scratchpad Registers Figure 8 DLAB bit selects between special registers 4 3 Interrupt Status Register The read only Interrupt Status Register can be used to guickly identify which serial ports reguire servicing after an interrupt Reading the Interrupt Status Register will return the interrupt status of the entire DSC 200 300 as shown in Figure 9 The individual bits are cleared as the interrupting ports are serviced The interrupt service routine should ensure that the interrupt status register reads zero before exiting 6 Ont use 0 not used 0 not used Port 2 1 if interrupt pending Port 1 1 if interrupt pending Figure 9 Interrupt Status Register Ouatech DSC 200 300 User s Manual 15 4 4 Options Register The Options Register allows software to identify the DSC 200 300 as a Ouatech Enhanced Serial Adapter It also allows software to set the UART clock rate multiplier Figure 10 shows the structure of the Options Register The powerup default of the Options Register is all bits zero Bit 7 MSB ID bit 1 IDO ID bit 0 NEN reserved 0 Preserved P reserved og reserved Figure 10 Options Register bit definitions 4 4 1 Enhanced Serial Adapter Identification The ID bits are used to identify the DSC 200 300 as a Quatech Enhanced Se
11. the computer with a newly installed DSC 200 300 the New Hardware Found dialog box will appear If you have never installed a Quatech PCI communications adapter before the dialog box may simply indicate that it has found a PCI Card Select the radio button for Driver from disk provided by hardware manufacturer Click the OK button to continue An Install From Disk dialog box should pop up Insert the CD with the Quatech INF files on it select the correct drive letter and click the OK button Windows automatically browses the root directory for an INF file that defines configurations for Multi function Adapters If no INF files are found click the Browse button and search the Win95 sub directory on the installation diskette You are not required to select the file name After finding the directory containing the INF files Windows will choose the correct file The New Hardware Found dialog box will appear again this time for an Unknown Device Again select the radio button for Driver from disk provided by hardware manufacturer Click the OK button to continue Another Install From Disk dialog box will pop up The path should already be pointing to the Quatech diskette Click the OK button to continue You should now see the Copying Files dialog box as Windows 95 copies the driver files from the diskette The installation utility will ask for your Window installation disks Serial communication ports requ
12. AI IEEIKI DSC 200 300 Two Channel RS 422 485 Asynchronous Communications Adapter for PCI bus User s Manual QUATECH INC TEL 330 434 3154 662 Wolf Ledges Parkway FAX 330 434 1409 Akron Ohio 44311 http www quatech com WARRANTY INFORMATION Quatech Inc warrants the DSC 200 300 to be free of defects for five 5 years from the date of purchase Quatech Inc will repair or replace any board that fails to perform under normal operating conditions and in accordance with the procedures outlined in this document during the warranty period Any damage that results from improper installation operation or general misuse voids all warranty rights Please complete the following information and retain for your records Have this information available when requesting warranty service DATE OF PURCHASE MODEL NUMBER DSC 200 300 PRODUCT DESCRIPTION Two Channel RS 422 485 Asynchronous PCI Bus Communications Adapter SERIAL NUMBER c 1998 2000 Ouatech Inc NOTICE The information contained in this document cannot be reproduced in any form without the written consent of Ouatech Inc Likewise any software programs that might accompany this document can be used only in accordance with any license agreement s between the purchaser and Quatech Inc Quatech Inc reserves the right to change this documentation or the product to which it refers at any time and without notice The authors have taken due care in the prepar
13. External Connections l 29 8 1 RTS cts Handshake ss SEG SABS AD DE VIE DES EG 30 8 2 ROL uror EID dad cep t nese eh Sree reeks 30 8 3 XCLK 5e reco ent te ear te athe anna aura M EE 31 8 4 AUXIN AUXOUT Loopback oo 31 8 5 Half Duplex Full Duplex Selection 32 8 6 Termination Resistors SS cece cee SS 34 8 7 RS 422 485 Peripheral Connection 35 9 PCI Resource Map L 1 1 sse 36 10 Specifications usos oett Ge ee 37 11 Troubleshooting eee 38 1 General Information The Ouatech Inc DSC 200 300 provides two RS 422 or RS 485 asynchronous serial communication interfaces for IBM compatible personal computer systems using the PCI expansion bus The DSC 200 300 uses Quatech s new Enhanced Serial Adapter design Legacy serial port data rates are limited to a maximum of 115 200 bits per second Quatech Enhanced Serial Adapters can achieve data rates as high as 921 600 bits per second As a PCI device the DSC 200 300 requires no hardware configuration The card is automatically configured by the computer s BIOS or operating system The two serial ports share a single interrupt line and are addressed in a contiguous block of 16 bytes A special interrupt status register is provided to help software to manage the shared interrupt The DSC 200 300 s serial ports are using 16750 Universal Asynchronous Receiver Transmitters UARTs These UARTs contain
14. ad base address 7 of each UART If the SPAD jumper is applied as in Figure 4 the UART scratchpad registers are enabled and the Interrupt Status Register and the Options Register are not available Figure 4 Enable scratchpad registers Ouatech DSC 200 300 Users Manual 11 2 4 2 Force High Speed UART Clock X2 X4 or X8 J10 J12 These jumpers force an increase of the UART input clock frequency by a factor of two four or eight This feature can allow legacy software to use baud rates above 115 200 bits per second It is also useful if the serial port device driver does not directly support setting the higher baud rates through the Options Register see page 10 If one of these jumpers is applied it overrides any value written to the Options Register to set the clock multiplier by software The effective baud rate will be either two four or eight times the value for which the UART itself is programmed The factory default is none of these jumpers applied which allows for software control of the clock multiplier via the Options Register The Options Register powerup default is for a standard times 1 clock of 1 8432 MHz for compatibility with standard serial ports ODO Juo 77 e Jit C 34 Ji2 OO xg 43 QOO SPAD ms OO SPAD Factory default Force times two clock software control Baud rates up to 230 4 kbps Jo OQO oe Jo D C x2 1 EE MOOD 42 OO x 42 77 x ja O CO SPAD 43 OQ CO SPAD Force times four cloc
15. anual 38 DSC 200 300 User s Manual Revision 1 20 June 2001 P N 940 0145 120 Quatech DSC 200 300 User s Manual 39
16. ation of this document and every attempt has been made to ensure its accuracy and completeness In no event will Quatech Inc be liable for damages of any kind incidental or consequential in regard to or arising out of the performance or form of the materials presented in this document or any software programs that might accompany this document Quatech Inc encourages feedback about this document Please send any written comments to the Technical Support department at the address listed on the cover page of this document DOS Windows ME Windows 2000 Windows 98 Windows 95 Windows NT are trademarks or registered trademarks of Microsoft Corporation OS 2 is a registered trademark of IBM Corporation All other trademarks or registered trademarks are property of their respective owners Declaration of Conformity Manufacturer s Name Manufacturer s Address Application of Council Directive Standards to which Conformity is Declared Type of Equipment Equipment Class Product Name Model Number Quatech Inc 662 Wolf Ledges Parkway Akron Ohio 44311 USA 89 336 EEC EN50081 1 EN55022 EN60555 2 EN60555 3 EN50082 1 IEC 801 2 IEC 801 3 amp IEC 801 4 Information Technology Equipment Commercial Residential amp Light Industrial PCI Dual Serial Communications Card DSC 200 300 750 IND 1 General Information RM KA ER OE EO d 7 Il Peat es Sers tiea RNEER GE ead EE a ted eS 8 1 1
17. c starting on page 19 2 3 Full duplex Half duplex Operation The DTR or RTS modem control output of the UART can be used to enable and disable the transmit drivers The inverse of these signals can also be used to enable and disable the receivers These options are selectable per channel The factory default as shown in Figure 2 is for both the drivers and receivers of both channels to be continuously enabled Two spare jumpers are installed in neutral positions For details refer to page 22 The DSC 200 300 is shipped from the factory with each channel configured as shown in Figure 2 xcuk 6 3 RCLK Jumpers 5 7 auxout 5 __ 2 AUXIN rts al 7 a cts Loopback RTS to CTS Loopback AUXOUT to AUXIN Loopback XCLK to RCLK Tx ENAB C 3 Rx ENABLE Tx ENABLES 2 RTS Jumpers J 6 8 Tx ENABLE D 1 DIR Full Duplex Operation spare jumpers supplied Figure 2 Factory default signal interface settings Ouatech DSC 200 300 Users Manual 10 2 4 Clock Rate and Optional Registers Figure 3 shows the jumper configuration as shipped from the factory with two spare jumpers applied in neutral positions Remove one or both and apply as shown in following subsections to set optional features Figure 3 Factory default clock rate and options settings 2 4 1 Enable Scratchpad Register SPAD J13 In the default configuration an Interrupt Status Register and an Options Register see page 10 replace the scratchp
18. ech DSC 200 300 User s Manual 26 non Quatech PCI devices in the system including those devices integrated on the motherboard In this example the Base addr 0 resource is reserved For users interested in even more details PCI BIOS information can be displayed by pressing the B key Pressing the I key displays the PCI interrupt routing table Quatech PCI Configuration Information Display Software Version 1 00 Quatech PCI adapters detected DSC 200 300 Two port RS 422 485 adapter Vendor ID 0x135c Device id 0x0050 found in slot 0x04 on bus 0x00 Device function code 0x98 Revision ID 0x01 Hardware revision A1 PCI Class Code 0x070200 Communications controller multiport serial Subsystem Vendor ID 0x135c Subsystem Id 0x0050 INTA mapped to IRQ 11 route 0x61 Base addr 0 Oxfc80 VO 0X80 bytes allocated Base addr 1 Oxffa80 VO 0X40 bytes allocated Q Quatech PCI adapters M Change to Basic Mode N Other PCI devices B PCI BIOS details X EXIT Interrupt routing details Figure 16 OTPCLEXE Expert Mode display Ouatech DSC 200 300 User s Manual 27 7 OS 2 The OS 2 device driver supports up to 32 serial ports in a system Installation is a manual but simple process Please refer to the read me documentation included on the Quatech COM CD with the device driver for full installation and configuration details Quatech DSC 200 300 User s Manual 28 8 External Connections The DSC 200 300 provides
19. es button 3 Double click the device group Multi function Adapters The DSC 200 300 model name should appear in the list of Multi function adapters Ouatech DSC 200 300 User s Manual 21 4 Double click the DSC 200 300 model name and a properties box should open for the hardware adapter 5 Click the Resources tab located along the top of the properties box to view the resources Windows 95 has allocated for the DSC 200 300 match the hardware configuration Because PCI is a true plug and play bus do not attempt to modify the configuration values listed Click Cancel to exit without making changes 6 The DSC 200 300 serial ports are also listed under the group Ports COM and LPT Windows 95 does not assign COM1 COM4 to ports addressed at nonstandard locations The DSC 200 300 ports will be enumerated starting with COMS or higher even if lower logical numbers are available 7 Select any of the Quatech Serial Ports listed under the group Port COM and LPT and click the Properties button This action opens a properties dialog for the specific COM port on the DSC 200 300 8 Click the Port Settings tab and then click the Advanced button The DSC 200 300 driver will display a custom Advanced Port Settings control which allows the ports UART compatibility mode and FIFO threshold levels to be configured The threshold values of full scale for the transmit buffer and 3 4 scale for the receive buffer shown below are optima
20. ire two drivers supplied by Microsoft to function SERIAL VXD and SERIALUI DLL Insert the disk or CD and click OK NOTE You may be able to skip this step if you are certain that your system has the latest version of these files installed If you do not have your Windows 95 install CD immediately available click OK anyway A dialog box appears with an option to Skip the files Click the Skip button and the files will not be installed This is all right if the latest version of these drivers are currently in the WINDOWS SYSTEM directory Quatech DSC 200 300 User s Manual 23 9 The New Hardware Found dialog will repeat for each of the serial ports on the DSC 200 300 as each port is registered with Windows 10 Installation is complete 5 6 Windows NT The Windows NT device driver is installed by running the SETUP program Up to 256 serial ports are supported There is a command line based configuration utility which is used for adding PCI bus and ISA bus serial ports Please refer to the documentation included with the device driver for full installation and configuration details Device drivers for Windows and OS 2 are also available for the DSC 200 300 The board can be used under DOS and other operating systems as well in many circumstances The software described below can be obtained from the Quatech web site if it did not come with the board Quatech DSC 200 300 User s Manual 24 6 DOS and Other Operating Systems The
21. k Force times eight clock Baud rates up to 460 8 kbps Baud rates up to 921 6 kbps Figure 5 Clock multiplier jumper options Ouatech DSC 200 300 User s Manual 12 3 Hardware Installation 1 Turn off the power of the computer system in which the DSC 200 300 is to be installed 2 Remove the system cover according to the instructions provided by the computer manufacturer 3 Make any desired optional jumper setting changes 4 Install the DSC 200 300 in any empty PCI expansion slot The board should be secured by installing the Option Retaining Bracket ORB screw 5 Replace the system cover according to the instructions provided by the computer manufacturer 6 Attach and secure the cable connectors to the desired equipment 7 Turn on the power of the computer system The output of the DSC 200 300 is two female 9 pin D connectors Termination select n Clock multiplier scratchpad select Interface configuration Figure 6 Jumper connector locations Ouatech DSC 200 300 Users Manual 13 4 Address Map and Special Registers This chapter explains how the two UARTS and special registers are addressed as well as the layout of those registers This material will be of interest to programmers writing driver software for the DSC 200 300 4 1 Base Address and Interrupt Level IRO The base address and IRQ used by the DSC 200 300 are determined by the BIOS or operating system Each serial port uses 8 consecutive
22. l for most applications Note that the FIFO option for each of the DSC 200 300 s two ports is configured independently 9 Use the Logical COM Port names to access the serial ports on your DSC 200 300 through your software applications Note The Logical COM Port name is assigned to your ports by Windows 95 This name is required by a Windows 95 application when accessing a particular port Windows 95 maintains a registry of all known hardware installed in your computer Inside this hardware registry Windows 95 keeps track of all of your system resources such as I O locations IRO levels and DMA channels The Add New Hardware Wizard utility in Windows 95 was designed to add new hardware and update this registry An INF configuration file is included with the DSC 200 300 to allow easy configuration in the Windows 95 environment Also a custom Windows 95 serial device driver is included with the DSC 200 300 to support the use of the 16750 UART s 64 byte FIFO Windows 95 uses the INF file to determine the system resources required by the DSC 200 300 searches for available resources to fill the boards requirements and then updates the hardware registry with an entry that allocates these resources Quatech DSC 200 300 User s Manual 22 5 5 Using the New Hardware Found Wizard The following instructions provide step by step instructions on installing the DSC 200 300 in Windows using the New Hardware Found wizard 1 After booting
23. lick the Next button Add New Hardware Wizard 3 On the next dialog select the CD ROM DRIVE check box Insert the Quatech COM CD shipped with the device into the CD ROM drive Click the Next button Quatech DSC 200 300 User s Manual 20 Add New Hardware Wizard Windows will search for new drivers in its driver database on your hard crive and in any of the following selected locations Click Next to start the search Floppy disk drives Iv CD ROM drive Microsoft Windows Update Specify a beation fax 7 Browse 4 Thefollowing dialog box will display the appropriate INF file on the diskette in drive Click the Next button 5 Window will copy the INF file from the diskette and display a final dialog indication that the process is complete Click the Finish button 5 4 Windows 95 The following instructions provide step by step instructions on viewing resources used by the DSC 200 300 in Windows 95 using the Device Manager utility Select Start then Help from within Windows 95 for additional information 1 Double click the System icon inside the Control Panel folder This opens up the System Properties box 2 Click the Device Manager tab located along the top of the System Properties box This lists all hardware devices registered inside the Windows 95 registry Additional information is available on any of these devices by click on the device name and then selecting the Properti
24. mpers J5 J8 Ouatech DSC 200 300 Users Manual 29 8 1 RTS CTS Handshake Transmission of RTS combined with reception of CTS allows for hardware handshaking data flow control between the UART and the external device RTS is transmitted on AUXOUT by connecting pins 4 and 5 of the jumper block CTS is received on AUXIN by connecting pins 1 and 2 of the jumper block If RTS CTS handshaking is not desired the RTS output can be looped back to the CTS input by connecting pins 1 and 4 of the jumper block Figure 19 shows how to select the RTS CTS mode Jumpers J 5 7 xeke O O 3 RELK xcik 6 O 3 RELK AUXOUT 5 T 2 AUXIN AUXOUT 5 2 AUXIN RTS 4 1 CTS RTs 4 7 a cts Transmit RTS on AUXOUT Loopback RTS to CTS Receive CTS on AUXIN Figure 19 RTS CTS selection 8 2 RCLK This is the clock signal used by the receiver portion of the UART It is generally provided by connecting it to the UART s own transmit clock output XCLK This is done by connecting pins 3 and 6 of the jumper block If desired RCLK can be received from an external source over the AUXIN line by connecting pins 2 and 3 of the jumper block Figure 20 shows how to select the RCLK mode Jumpers J 5 7 xcik 6 3 RCLK xcik 6 C 3 RELK AUXOUT 5 Q O 2 AUXIN AUXOUT 5 2 AUXIN RTs 4 OO 1 cts Ris C ers Loopback XCLK to RCLK Receive RCLK on AUXIN Figure 20 RCLK selection Ouatech DSC 200 300 User s Manual 30 8 3 XCLK This
25. py the file from the CD Click the Next button 4 The final dialog screen will verify the file copy from the CD Click the Finish button Ouatech DSC 200 300 User s Manual 18 5 2 Windows 2000 1 After inserting a DSC 200 300 for the first time the Add New Hardware Wizard will appear at start up Click the OK button Insert Disk x Please insert the Compact Disc labeled Quatech PCI PCMCIA Multiport Serial Driver Installation Disk into your CD ROM drive H and then click OK Cancel You can also click OK if vou want files to be copied from an alternate location such as a floppy disk or a network server 2 The following dialog box insert the Quatech COM CD shipped with the device Click the OK button xi The file aserfilt sys on Quatech PCIZPCMCIA Multiport e Serial Driver Installation Disk is needed Cancel Type the path where the file is located and then click DK Copy files from Y Browse 4 The following dialog box will display the appropriate INF file on the CD in drive Click the OK button 5 Window will copy the INF file from the CD and display a final dialog indication that the process is complete Click the Finish button Ouatech DSC 200 300 Users Manual 19 5 3 Windows 98 1 After inserting a DSC 200 300 for the first time the Add New Hardware Wizard will appear at start up Click the Next button 2 Select Search for the best driver for you device C
26. rial Adapter Logic operations are performed such that the values read back from these bits will not necessarily be the values that were written to them Bit ID1 will return the logical AND of the values written to ID 1 0 while bit IDO will return their exclusive OR Software can thus identify a Quatech Enhanced Serial Adapter by writing the ID bits with the patterns shown in the write column of Figure 11 then reading the bits and comparing the result with the patterns in the read column Matching read patterns verify the presence of the Options Register Figure 11 ID bit write read table ID1 IDO ID1 IDO 1 1 0 0 0 EE EE en Ouatech DSC 200 300 Users Manual 16 4 4 2 Clock Rate Multiplier A standard serial port operates at a clock speed of 1 8432 MHz In order to achieve higher data rates Quatech Enhanced Serial Adapters can operate at two times four times or even eight times this standard clock speed This is controlled by the clock rate multiplier bits in the Options Register Software can determine the UART clock frequency by reading the clock rate multiplier bits RR1 and RRO in the Options Register as shown in Figure 12 RR1 and RRO can be set by writing to the Options Register if the X2 X4 and X8 jumpers J10 J12 are all removed If one of these jumpers is applied the RR1 and RRO bits are forced to the appropriate value Reading the Options Register will always return the clock rate multiplier at
27. rol various hardware features Jumpers J1 J4 located in a column near the D 9 connectors control the RS 422 or RS 485 signal line termination Jumpers J5 J8 located in a column just to the right of J1 J4 control how signals are routed from the UARTs to the connector as well as full or half duplex operation Jumpers J10 J13 grouped together at the end of the board opposite the D 9 connectors control special options Any changes from the factory default should be made before installing the DSC 200 300 in the computer 2 1 RS 422 or RS 485 Signal Line Termination Jumpers J1 J4 allow the selection of 100 ohm RS 422 termination 120 ohm RS 485 termination or no termination at all The factory default shown in Figure 1 is RS 422 termination For full details see page 24 Jumpers J1 J4 Te RS 422 termination 100 ohms factory default Figure 1 Factory default signal termination settings Ouatech DSC 200 300 User s Manual 9 2 2 Signal Connections The DSC 200 300 provides each of two serial ports with four differential signal pairs TxD RxD AUXOUT and AUXIN TxD and RxD are always present at the connector The AUXOUT and AUXIN signals can be used to support RTS CTS handshaking external clocking or external signal loopback The factory default configuration as shown in Figure 2 is a loopback of AUXOUT to AUXIN at the connector with RTS and CTS looped back on the board There is an extensive discussion of this topi
28. s The transmit drivers can be controlled by either the Data Terminal Ready DTR or the Request to Send RTS output from the UART If a jumper is applied between pins 1 and 4 the drivers are enabled for TxD and AUXOUT when the UART s DTR signal is asserted If a jumper is applied between pins 2 and 5 the drivers are enabled for TxD and AUXOUT when the UART s RTS signal is asserted If neither of these jumpers is applied the drivers remain enabled at all times When disabled the transmit drivers enter a high impedance state The receivers can be controlled by the inverse of the transmit enable If a jumper is applied between pins 3 and 6 the receivers for RxD and AUXIN will be disabled when the transmit drivers are enabled and vice versa based on the DTR or RTS connections on pins 1 4 or 2 5 To operate in half duplex DTR mode apply jumpers between pins 1 and 4 and pins 3 and 6 To operate in half duplex RTS mode apply jumpers between pins 2 and 5 and pins 3 and 6 To operate in full duplex mode leave the jumpers in their factory default locations installed in the spare locations of 4 5 and 6 only The drivers and receivers are always enabled in full duplex mode Figure 23 shows how to select half or full duplex operation WARNING When operating in half duplex mode the transmitter drivers must be disabled before receiving any data Failure to do so may result in multiple active output drivers being connected together which may ca
29. use damage to the board the computer and the external device Ouatech DSC 200 300 User s Manual 32 Jumpers J 6 8 ABIE 6 Tx EN Tx ENABLE 5 Half Duplex DTR Operation Tx EN ABIE 4 Half Duplex RTS Operation Full Duplex Operation Figure 23 Half or full duplex selection AUXOUT RS 422 or RS 485 Driver RS 422 or RS 485 Receiver Figure 24 Output control block diagram Quatech DSC 200 300 User s Manual 33 8 6 Termination Resistors Line termination resistors are provided for the input signals of each of the DSC 200 300 s RS 422 485 ports Termination may be selected or removed for individual signal lines using jumper blocks J1 J4 RS 422 Rtz100 ohm 1 2W RS 485 Rt 120 ohm 1 2W RS 422 485 Receiver RXD AUXIN or RXD AUXIN Jumpers J1 J4 O O 2 2 2 FE 1O 1 no termination RS 422 termination RS 485 termination 100 ohms 120 omhs factory default Figure 25 RS 422 485 Line termination resistance values Quatech DSC 200 300 User s Manual 34 8 7 RS 422 485 Peripheral Connection The DSC 200 300 connects to peripheral equipment through two female D 9 connectors The serial port connector definitions are listed in Figure 26 SignalDescription D 9 Connector Pin pum mw 7 m me 5 Auxum 1 Amour fs AUN 5 ww 0 5 I acci Figure 26 DSC 200 300 connector definitions D 9 connector CN2 and CN3
30. which the board is operating Clock Rate UART Clock Maximum Data 1 3 6864 MHz 230 4 kbaud x TENE 7 3728 MHz 460 8 kbaud 14 7456 MHz 921 6 kbaud 16750 UART only Figure 12 Rate Register bit definition At powerup and reset the Options Register is initialized to 0 The DSC 200 300 will thus powerup in the x1 mode with software control of the clock rate multiplier enabled as long as the X2 X4 and X8 jumpers are not installed Software can control high baud rates through a combination of changing the clock rate multiplier and the UART baud rate divisor For example a baud rate of 230 4 kbps could be achieved by setting the clock rate multiplier to X2 mode or by applying the X2 jumper and setting a software application for 115 2 kbps Ouatech DSC 200 300 User s Manual 17 5 Windows Configuration 5 1 Windows Millennium 1 After inserting the DSC 200 300 for the first time the Add New Hardware Wizard will begin Select Search for the best driver for your device Check the Removable media and Specify location box Click the Next button Add New Hardware Wizard Wirdows wil scarch for new drivers inite crivet database on nu aard drive and in any of tre Ton selected z Removable Mediz Fleppy CD ROM iw Specify alucaturi DM Browse Display a list uf al He divas ii a peutic lucatiuri zu yii zer xele d Herrin yina waril ce m esse 3 Window will locate the proper INF file and co
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