Quatech RS-422 Manuale utente

DSCLP-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

?2002 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 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.

iv DSCLP-200/300 User's Manual

WARRANTY INFORMATION

Quatech, Inc. warrants the DSCLP-200/300 to be free of defects for

five(5)yearsfrom 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: DSCLP-200/300

PRODUCT DESCRIPTION: Two Channel RS-422/485 Asynchronous

PCI Bus Communications Adapter

SERIAL NUMBER:

DSCLP-200/300 User's Manual i

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 DualSerial Communications

Card

Model Number : DSCLP-200/300 (750,IND)

ii DSCLP-200/300 User's Manual

Table of Contents

10 Troubleshooting .................................................27

9Specifications ....................................................26

8PCI Resource Map ..............................................257.7 RS-422/485 Peripheral Connection ................................247.6 Termination Resistors ............................................227.5 Half-Duplex/Full-Duplex Selection .................................217.4 AUXIN/AUXOUT Loopback ....................................217.3 XCLK .........................................................207.2 RCLK .........................................................207.1 RTS/CTS Handshake ............................................19

7External Connections ...........................................176.3.1 QTPCI.EXE .............................................166.3 DOS and other operating systems ..................................166.2 OS/2 ..........................................................166.1 Windows NT ...................................................16

6Other Operating Systems .......................................135.2 Viewing Resources with Device Manager ...........................125.1 Using the "New Hardware Found" Wizard ..........................12

5Windows 95 Configuration .....................................114.4.2 Clock Rate Multiplier ......................................104.4.1 Enhanced Serial Adapter Identification .......................104.4 Options Register ................................................. 94.3 Interrupt Status Register ...........................................94.2 Enabling the Special Registers ......................................84.1 Base Address and Interrupt Level (IRQ) .............................8

4Address Map and Special Registers ............................7

3Hardware Installation ...........................................6

2.4.2 Force High-Speed UART Clock (X2, X4, or X8,

J10-J12) ........................................................

52.4.1 Enable Scratchpad Register (SPAD, J13) .....................52.4 Clock Rate and Optional Registers ..................................42.3 Full-duplex/Half-duplex Operation ..................................42.2 Signal Connections ................................................32.1 RS-422 or RS-485 Signal Line Termination ..........................3

2Hardware Configuration ........................................21.1.2 "750" Option --- UART Upgrade ............................21.1.1 "IND" Option --- Surge Suppression Upgrade .................21.1 Optional Features .................................................1

1General Information .............................................

DSCLP-200/300 User's Manual iii

1General Information

The Quatech, Inc. DSCLP-200/300(two-port) and SSCLP-200/300

(one-port) provides upto provides two RS-422 or RS-485 asynchronous serial

communication interfaces for IBM-compatible personal computer systems using the

PCI expansion bus. The DSCLP-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

460,800 bits per second. This discussion relates to DSCLP-200/300.A

SSCLP-200/300 is just one port in the discussion.

As a PCI device, the DSCLP-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. Aspecial interrupt status register is provided to help software to manage the

shared interrupt.

The DSCLP-200/300's serial ports are implemented using 16550 Universal

Asynchronous Receiver/Transmitters (UARTs). These UARTs contain hardware

buffers (FIFOs) which reduce processing overhead and allow higher data rates to be

achieved. The 16550 contains a 16-byte FIFO and can transmit and receive data at a

rate of up to 230,400 bits per second.

The DSCLP-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.

DSCLP-200/300 User's Manual 1

2Hardware Configuration

The DSCLP-200/300 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 jumper settings that control 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-9connectors, control special options.

Any changes from the factory default should be made before installing the

DSCLP-200/300 in the computer.

2.1RS-422 or RS-485 Signal Line Termination

Jumpers J6-J9allow 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.

RS-422 termination

(100 ohms)

(factory default)

Jumpers J6-J9

Figure 1--- Factory default signal termination settings

2DSCLP/SSCLP-200/300 User's Manual

2.2Signal Connections

The DSCLP-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 topic starting on page 19.

2.3Full-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 DSCLP-200/300 is shipped from the factory with each channel configured

with No jumpers on J10-23. The following conditions occur: CTS=AUXIN,

AUXOUT=RTS, RCLK=TCLK, TXEN=1 AND RXEN=1.

Jumpers J10-J23 define the options for this card:

DSCLP-200/300 User's Manual 3

SPAD

CTS0_SEL

AUX0_SEL0

AUX0_SEL1

J10

J11

J12

RCLK0_SEL

TGL0_SEL0

TGL0_SEL1

J13

J14

J15

RXEN0_SEL

CTS1_SEL

AUX1_SEL0

J16

J17

J18

AUX1_SEL1

RCLK1_SEL

TGL1_SEL0

J19

J20

J21

TGL1_SEL1

RXEN1_SEL

J22

J23

Right Card Edge Jumpers

2.3.1CTS0_SEL, CTS1_SEL (J10,17)

With NO jumpers on J10 or J17 the mode selection is CTS=AUXIN. With

Jumpers installed the mode selection is CTS=RTS.

2.3.2AUX0_SEL1,0, AUX1_SEL1,0 (J12,11,19,18)

With NO jumpers on J12 or J19 the mode selection is AUXOUT=RTS. With

Jumpers installed on J12 or J19 and NO jumpers installed on J11 or J18, the mode

selection is AUXOUT=TCLK. With Jumpers installed on J12, J11 or J19, J18, the

mode selection is AUXOUT=AUXIN.

2.3.3RCLK0_SEL, RCLK1_SEL (J13, 20)

4DSCLP/SSCLP-200/300 User's Manual

With NO jumpers on J13 or J20 the mode selection is RCLK=TCLK. With

Jumpers installed on J13 or J20 the mode selection is RCLK=AUXIN.

2.3.4TGL0_SEL1,0, TGL1_SEL1,0 (J15,14,22,21)

With NO jumpers on J15,14, or J22,21 the mode selection is TXEN=1. With

Jumpers installed on J14 or J21 and NO jumpers on J15 or J22, the mode selection is

TXEN=DTR. With Jumpers installed on J15 or J22 and NO jumpers on J14 or J21,

the mode selection is TXEN=RTS.With Jumpers installed on J15, J14 or J22, J21, the

mode selection is TXEN=”Auto Toggle”.

2.3.5RXEN0_SEL, RXEN1_SEL (J16, 23)

With NO jumpers on J16 or J23 the mode selection is RXEN=1. With

Jumpers installed on J16 or J23 the mode selection is RCLK=!TXEN.

2.4Clock 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.

SPAD

Figure 3--- Factory default clock rate and options settings

2.4.1Enable Scratchpad Register (SPAD, J2)

In the default configuration, an Interrupt Status Register and an Options Register

(see page 10) replace the scratchpad (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.

DSCLP-200/300 User's Manual 5

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