Quatech DSC-100 User Manual

DSC-100

Two Channel RS-232 Asynchronous

Communications Adapter

for PCI bus

User's Manual

QUATECH, INC. TEL: [phone]
662 Wolf Ledges Parkway FAX: [phone]
Akron, Ohio 44311 http://www.quatech.com

WARRANTY INFORMATION

Quatech, Inc. warrants the DSC-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. 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-100

PRODUCT DESCRIPTION: Two Channel RS-232 Asynchronous

PCI Bus Communications Adapter

SERIAL NUMBER:

(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. 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 preparation 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: Quatech Inc.

Manufacturer's Address: 662 Wolf Ledges Parkway

Akron, Ohio 44311 (USA)

Application of Council Directive: 89/336/EEC

Standards to which
Conformity is Declared: * EN50081-1 (EN55022,

EN60555-2, EN60555-3)
* EN50082-1 (IEC 801-2,
IEC 801-3, & IEC 801-4)

Type of Equipment: Information Technology

Equipment

Equipment Class: Commercial, Residential, & Light
Industrial

Product Name: PCI Dual Serial Communications

Card

Model Number : DSC-100/IND

1 General Information

........................................

5

61.1 Features ........................................................

61.1.1 "IND" Option --- Surge Suppression Upgrade ...........

2 Hardware Configuration

3 Hardware Installation

.................................

....................................

4 Address Map and Special Registers

5 Windows Configuration

.................................

.................

7

72.1 Factory Default Configuration ................................

72.2 Enable Scratchpad Register (SPAD, J8) ......................

82.3 Force High-Speed UART Clock (X2, X4, or X8, J5-J7) ......

92.4 DTE/DCE Selection ...........................................

10
11

114.1 Base Address and Interrupt Level (IRQ) ...................

124.2 Enabling the Special Registers ..............................

124.3 Interrupt Status Register .....................................

134.4 Options Register ..............................................

134.4.1 Enhanced Serial Adapter Identification .................

144.4.2 Clock Rate Multiplier .....................................

15

155.1 Windows Millennium ........................................

165.2 Windows 2000 ................................................

6 DOS and Other Operating Systems
7 OS/2

8 External Connections
9 PCI Resource Map
10 Specifications
11 Troubleshooting

............................................................

.....................................

..........................................

.............................................

...........................................

..................

175.3 Windows 98 ...................................................

185.4 Windows 1995 ................................................

205.5 Windows NT .................................................

205.6 Viewing Resources with Device Manager ..................

22

226.1.1 QTPCI.EXE .................................................

25
26
28
29
31

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.
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-100 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 32 bytes.
A special interrupt status register is provided to help software to manage the shared
interrupt.

The DSC-100's serial ports use 16750 Universal Asynchronous
Receiver/Transmitters (UARTs). These UARTs contain 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-100 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.

1.1 Features

no

DSC-100

Quatech DSC-100 User's Manual

5

The 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 industrial-grade reliability, Quatech offers the following board
upgrades:

1.1.1 "IND" Option --- Surge Suppression Upgrade

The "IND" option 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.

IND OptionPart Number

yesDSC-100IND

Figure 1 --- DSC-100 Product Series Summary

2 Hardware Configuration

Quatech DSC-100 User's Manual

6

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. Jumpers J5-J8 are grouped together at the end of the board opposite
the D-9 connectors. Any changes from the factory default should be made before
installing the DSC-100 in the computer.

2.1 Factory Default Configuration

Figure 2 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 sections to set optional features.

J5
J6
J7

J8

X2

X4

X8

SPAD

Figure 2 --- Factory default jumper configuration

2.2 Enable Scratchpad Register (SPAD, J8)

In the default configuration, an Interrupt Status Register and an Options Register
(see page 9) replace the scratchpad (base address + 7) of each UART. If the SPAD
jumper is applied as in Figure 3, the UART scratchpad registers are enabled, and the
Interrupt Status Register and the Options Register are not available.

J5

J6

X2

X4

J7

J8

X8

SPAD

Figure 3 --- Enable scratchpad registers

2.3 Force High-Speed UART Clock (X2, X4, or X8, J5-J7)

Baud rates up to 230.4 kbps

software control

Quatech DSC-100 User's Manual

7

These jumpers force an increase of the UART input clock frequency by a factor of
two, four, or eight. This 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 12).

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.

J5
J6
J7

J8

Factory default

J5

J6

J7

J8

Force times-four clock

Baud rates up to 460.8 kbps

X2

X4

X8

SPAD

X2

X4

X8

SPAD

Figure 4 --- Clock multiplier jumper options

J5
J6
J7

J8

Force times-two clock

J5

J6

J7

J8

Force times-eight clock

Baud rates up to 921.6 kbps

X2

X4

X8

SPAD

X2

X4

X8

SPAD

2.4 DTE/DCE Selection

Quatech DSC-100 User's Manual

8

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. The DTE/DCE selection jumper blocks are illustrated in
Figure 5.

J2 is used for serial port 1, closest to the bottom of the board.

J1 is used for serial port 2, closest to the top of the board.

TxD

pin 2

RTS

pin 8

DTR

pin 6

TxD

pin 2

RTS

pin 8

DTR

pin 6

1

2

3 9

4

10

5

11

6

12

1

2
3 9
4
5
6

7
8

10
11
12

pin 3

J2 -- Port 1

RxD
pin 7
CTS
pin 4
DSR

7

8

pin 3
RxD
pin 7
CTS

pin 4
DSR

J1 -- Port 2

These jumper blocks are used to
connect RS-232 signals to the
various pins of the D-9 connectors.

TxD

pin 2

RTS

pin 8

DTR

pin 6

1
2

3 9

4

10

5

11

6

12

7
8

pin 3
RxD
pin 7
CTS

pin 4
DSR

DTE configuration

DCE configuration

(factory default)

Figure 5 --- DTE or DCE output selection

3 Hardware Installation

Quatech DSC-100 User's Manual

9

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. Install the DSC-100 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-100 is a pair of 9-pin D-connectors. All modem control

signals (RTS, DTR, CTS, DSR, DCD, RI) are provided to each port.

Serial

Port

2

Serial

Port

1

J1 - Port 2

Clock multiplier/
scratchpad select

J5
J6

DTE/DCE Select

J2 - Port 1

J7
J8

Figure 6 --- Jumper/connector locations

X2
X4

X8

SPAD