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DS C -100 Two Channel RS- 232 Asynchronous Communications Adapte r 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.
WARRANTY INFORMATION Quatech, Inc. warrants the DS C -100 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.
(c) 1998 - 2001 , Quatech, Inc. NOTICE The information contained in this document cannot be reproduced in any form without the written consent of Quatech, 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.
Declaration of Conformity Manufacturer's Name: Quatech Inc. M anufacturer's Address: 662 Wolf Ledges Parkway Akron, Ohio 44311 (USA) Application of Council Directive: 89/336/EEC Standards to.
31 11 Troubleshooting ........................................... 29 10 Specifications ............................................. 28 9 PCI Resource Map .......................................... 26 8 External Connections ...........................
1 General Information The Quatech, Inc. DSC-100 provides two RS- 232 asynchronous serial communication interfaces for IBM-compatible personal computer systems using the PCI expansion bus . The DSC-100 uses Quatech's new Enhanced Serial Adapter design.
1 . 1 Features T he standard DSC-100 implements each of its communication channels with a 16750 UART and uses standard line driver and receiver components. For improved performance and indust rial -grade reliability, Quatech offers the fo llowing board upgrades: 1 .
2 Hardware Configuration The DSC-100 is automatically configured at boot time by the computer's BIOS or operating system. There are no required switches or jumpers to set for installation. This chapter lists a number of optional jumper settings that control various hardware features.
2 . 3 Force High-Speed UART Clock (X2, X4, or X8, J 5 -J 7 ) These jumpers force an increase of the UART input clock frequency by a factor of two, four, or eight.
2 . 4 DTE/DCE Selection To simplify connections to other devices, each port on the DSC-100 is equipped with a jumper block that allows the port to be configured as either a DTE- or DCE-type device. This allows the DSC-100 to connect to either DTE- or DCE-type devices without using a null modem cable.
3 Hardware Installation 1. Turn off the power of the computer system in which the DSC-100 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 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.
4 . 2 Enabling the Special Registers The DSC-100 contains two unique registers, an Interrupt Status Register and an Options Register. These registers are enabled when the SPAD jumper (J 8 ) is removed (factory default). They replace the UART Scratchpad Register on accesses to register address 7.
4 . 4 Options Register The Options Register allows software to identify the DSC-100 as a Quatech 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.
4 . 4 . 2 Clock Rate Multiplier A standard RS-232 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.
5 Windows Configuration 5 . 1 Windows Mille nnium 1. After inserting the DSC-100 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.
5 . 2 Windows 2000 1. After inserting a DSC-100 for the first time, the "Add New Hardware Wizard will appear at start up. C lick the "OK" button. 2. The following dialog box insert the Communications Driver CD ( shipped with the device).
5 . 3 Windows 98 1. After inserting a DSC-100 for the first time, the "Add New Hardware Wizard will appear at start up. C l ick the "Next" button. 2. Select "Search for the best driver for you device". Click the "Next" button.
4. The following 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 indic ation that the process is complete. Click the "Finish" button.
1. After booting the computer with a newly-installed DSC-100, 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.
5 . 5 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 .
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 optimal for most applications. Note that the FIFO option for each of the DSC-100 's two ports is configured independently.
6 D OS and Other Operating Systems The DSC-100 is not a direct drop-in replacement for a legacy serial port because its base address and IRQ cannot be fixed at values such as 3F8 hex, IRQ 4 (COM1) or 2F8 hex, IRQ 3 (COM2), etc. Rather, the system BIOS assigns the address and the IRQ in a plug-and-play fashion at boot time.
The QTPCI program is capable only of displaying the PCI configuration. It cannot be used to make changes. Q - Quatech PCI adapters N - Other PCI devices X - EXIT M - Change to Expert Mode Quatech PCI Configuration Information Display Software Version 1.
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 non-Quatech PCI devices in the system, including those devices integrated on the motherboard.
Quatech DSC-100 User's Manual 24.
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 documentation included with the device driver for full installation and configuration details. Device drivers for Windows NT and OS/2 are also available for the DSC-100.
8 External Connections RS- 232 -C devices are classified by their function as either Data Terminal Equipment (DTE) or Data Communication Equipment (DCE).
The DSC-100 is a DTE device which connects to peripheral equipment through two male D-9 connectors. An adapter cable providing two male D-25 connectors is available.
9 PCI Resource Map Listed below are the PCI resources used by the DSC-100. Such information may be of use to customers writing their own device drivers or other custom software. A detailed description of the DSC-100's UARTs is available on the Quatech web site.
10 Specifications Bus interface PCI, 32 -bit bus , 5-volt only IBM - compatible computers Dimensions: approx . 5.0" x 3.7" Serial ports Controller: 16750 with 64-byte FIFOs Interface: Two ma.
5030 4400 3500 1670 800 115.2 2100 1670 1200 1000 330 230.4 1 0 00 900 670 430 100 460.8 470 430 200 100 N/ A 921.6 25% trans time 20% trans time 15% trans time 10% trans time 4% trans time Maximum Lo.
11 Troubleshooting Listed here are some common problems and frequent 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 DS C -100's warranty.
DSC-100 User's Manual Revision 1.10 June 2001 P/N: 940-0138-110 Quatech DSC-100 User's Manual 32.
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