Black Box IC110C User manual

CUSTOMER

SUPPORT

INFORMATION

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX

FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746

Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

MARCH 2000

IC110C

IC174C

Dual Port RS-232 Serial Interface

DUAL PORT RS-232 SERIAL INTERFACE

FEDERAL COMMUNICATIONS COMMISSION

AND

CANADIAN DEPARTMENT OF COMMUNICATIONS

RADIO FREQUENCY INTERFERENCE STATEMENTS

This equipment generates, uses, and can radiate radio frequency energy and

if not installed and used properly, that is, in strict accordance with the

manufacturer’s instructions, may cause interference to radio communication.

It has been tested and found to comply with the limits for a Class A

computing device in accordance with the specifications in Subpart J of Part 15

of FCC rules, which are designed to provide reasonable protection against

such interference when the equipment is operated in a commercial

environment. Operation of this equipment in a residential area is likely to

cause interference, in which case the user at his own expense will be required

to take whatever measures may be necessary to correct the interference.

Changes or modifications not expressly approved by the party responsible for

compliance could void the user’s authority to operate the equipment.

This digital apparatus does not exceed the Class A limits for radio noise emission from

digital apparatus set out in the Radio Interference Regulation of the Canadian

Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites

applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le

brouillage radioélectrique publié par le ministère des Communications du Canada.

TRADEMARKS USED IN THIS MANUAL

AT and IBM are registered trademarks of International Business Machines

Corporation. PC/XT and XT are trademarks of International Business

Machines Corporation.

DUAL PORT RS-232 SERIAL INTERFACE

Contents

Chapter Page

1. Specifications...................................................................................................1

2. Introduction ....................................................................................................2

2.1 Overview..................................................................................................2

2.2 What’s Included......................................................................................2

2.3 Features...................................................................................................3

2.4 Technical Description............................................................................4

3. Address Selection............................................................................................6

4. Option Selection .............................................................................................8

5. Installation.....................................................................................................10

5.1 Installing the Adapter in Your Operating System...............................10

5.1.1 Windows 3.1x...............................................................................10

5.1.2 Windows 95/98 ...........................................................................10

5.1.3 Windows NT ................................................................................10

5.2 Installing the Hardware ........................................................................10

Appendix: Cicuit-Board Design ........................................................................11

1

CHAPTER 1: Specifications

Protocol — Asynchronous

Number of Ports — 2

Speed — IC110C: Up to 115.2 Kbps; IC174C: 460.8 kbps and higher

Operation — RS-232

Connectors — (2) DB9M

Maximum Distance — 50 ft. (15.2 m) @ 19.2 Kbps with 2500 pF max. cable

capacitance (lower capacitance will allow greater distances)

Communications Chip — IC110C: 16550 UART; IC174C: 16950 UART

MTBF — >150,000 hours

MTTR — <0.25 hours

Materials — Boards are solder mask over bare copper or tin nickel

Operating Temperature — 32° to 122°F (0° to 50°C)

Storage Temperature — -4° to 158°F (-20° to 70°C)

Humidity — 0 to 90% relative humidity, noncondensing

Power — +5 VDC @ 270 mA ±12 V @ 50 mA

Size — 5"W x 5"D (12.7 x 12.7 cm)

Weight — 0.2 lb. (0.1 kg)

1. Specifications

2

DUAL PORT RS-232 SERIAL INTERFACE

2.1 Overview

The Dual Port RS-232 Serial Interface provides your PC system with two RS-

232 asynchronous ports. Connect to any device that uses the RS-232 protocol,

such as modems, data-entry terminals, and plotters.

The Serial Interface also includes a serial utility diskette with Seacom, a DOS

interrupt and driver package. Seacom allows data to be buffered, eliminating

data loss in high-speed data transfers. It also allows more than 4 ports (256

max.) to be configured and utilized under DOS.

The README file on the serial utility diskette contains information about the

latest changes and revisions. To view this file, insert the diskette into drive A

or B and type A:TYPE READ.ME|MORE [ENTER] or B:TYPE

READ.ME|MORE [ENTER].

2.2 What’s Included

Your Serial Interface should come with the following items. If any of these

items are missing or damaged, contact your supplier.

(1) Dual Port RS-232 Serial Interface,

(2) serial utility software diskettes: (1) for 32-bit Windows

®

,

(1) for DOS and Windows

®

3.1x

This manual

2. Introduction

3

CHAPTER 2: Introduction

2.3 Features

Listed below are the special features your Serial Interface offers.

• Each port is independently addressable.

• Eight interrupt options, including AT interrupts, for simple integration

into existing systems.

• IRQs can be shared or individually set for each port.

• Supports Interrupt Sharing—only one interrupt line required for multiple

ports.

• Supports any character set defined by binary notation.

• 16550 UARTs (IC110C) or 16950 UARTs (IC174C) help ensure against

data loss.

• Faster baud rates—up to 115.2 Kbps (IC110C) or 460.8 kbps and higher

(IC174C).

• Dual DB9 male AT

®

style connectors.

• Individually selectable address and interrupt (2–5 and 10, 11, 12, or 15 on

the AT connector) for each port.

4

DUAL PORT RS-232 SERIAL INTERFACE

2.4 Technical Description

The Dual Port RS-232 Serial Interface provides the PC/XT™/AT/80X86

computer with two additional serial ports for terminals, modems, printers,

etc. The Dual Port RS-232 Serial Interface can be configured as COM1:

through COM4:, or any other I/O address.

The Dual Port RS-232 Serial Interface (IC110C) utilizes the same 16550

UART chip found in the IBM

®

asynchronous adapter. This chip features

programmable baud rate, data format, and interrupt control. Refer to the

IBM Technical Reference for details on programming the chip. The IC174C uses

the 16950 UART chip.

Each serial port can be set as COM1:, COM2:, or any other I/O address set up

to 3FF hex, providing total compatibility with most communications software

and languages. Some software packages require the use of the modem

handshake signals such as CTS or DCD. Consult your software manual to

determine handshake-signal requirements. If no requirements are

mentioned, or if you are not sure, a safe configuration is to connect (in your

cable hood) DTR to DSR and DCD, and tie RTS to CTS. This usually satisfies

the modem signal requirements for most communications software.

The table on page 5 shows the connector pinouts for ports J1 and J2 (DB9).

Note that this is the same RS-232 pinout as the DB9 serial AT connector.

5

CHAPTER 2: Introduction

Pin Number Signal Name Mode

3 Transmit Data (TD) Output RS-232

7 Request To Send (RTS) Output RS-232

4 Data Term Ready (DTR) Output RS-232

5 Ground (GND) ––––––––––––

2 Receive Data (RD) Input RS-232

1 Data Carrier Detect (DCD) Input RS-232

6 Data Set Ready (DSR) Input RS-232

8 Clear To Send (CTS) Input RS-232

9 Ring Indicator (RI) Input RS-232

6

DUAL PORT RS-232 SERIAL INTERFACE

NOTE

Be sure to set the address selections and jumper options before

installation.

Each serial port on the Dual Port RS-232 Serial Interface occupies 8

consecutive I/O locations. A DIP switch is used to set the base address for

these locations. Be careful when selecting the base address as some selections

conflict with existing PC ports. The following table shows several examples

that usually do not cause a conflict. SW1 sets the I/O address for Port 2 (the

upper connector), while SW2 sets the address for Port 1 (the lower

connector).

Address Binary Switch Position Setting

Hex A9 A0 1 2 3 4 5 6 7

280-287 1010000XXX OFF ON OFF ON ON ON ON

2A0-2A7 1010100XXX OFF ON OFF ON OFF ON ON

2E8-2EF 1011101XXX OFF ON OFF OFF OFF ON OFF

2F8-2FF 1011111XXX OFF ON OFF OFF OFF OFF OFF

3E8-3EF 1111101XXX OFF OFF OFF OFF OFF ON OFF

300-307 1100000XXX OFF OFF ON ON ON ON ON

328-32F 1100101XXX OFF OFF ON ON OFF ON OFF

3F8-3FF 1111111XXX OFF OFF OFF OFF OFF OFF OFF

Typically COM1:=3F8h; COM2:=2F8h; COM3:=3E8h; COM4:=2E8h

If you do not see an address in the table that is compatible with your software,

3. Address Selection

7

you can determine the switch setting for a particular address by using the

following illustration. The illustration shows the correlation between the DIP

switch setting and the address bits used to determine the base address. In the

figure below, the address 300 hex through 307 hex is selected (300 HEX =11

0000 0XXX in binary representation). Note that setting the switch ON (or

closed) corresponds to a “0” in the address, while leaving it OFF (or open)

corresponds to a “1.”

A9 A3 EN

ON

12345678

CHAPTER 3: Address Selection

8

DUAL PORT RS-232 SERIAL INTERFACE

NOTE

Be sure to set the address selections and jumper options before

installation.

The board contains several jumper straps for each port which must be set for

proper operation.

Port Enable/Disable

Each port on the Dual Port RS-232 can be enabled or disabled with switch

position 8 on the DIP switch. The port is enabled with the switch ON (or

closed) and disabled when OFF (or open). Switch 2 (SW2), position 8

enables/disables Port 1, while Switch 1 (SW1), position 8 enables/disables

port 2. If either port is disabled, be sure to also disable the interrupt request

for that port by removing the IRQ jumper (see Figure 4-1).

Setting the Interrupt Request

Headers E1 and E2 select the interrupt request for each serial port. If COM1:

is selected, this jumper must be on the IRQ4 setting. If COM2: is selected, this

jumper must be on IRQ3. Both ports can be set to the same IRQ setting. If no

interrupt is desired, remove the jumper.

NOTE

Most communications software applications default COM3: to IRQ4 and

COM4: to IRQ3. This requires the sharing of interrupts between COM1:

and COM3:, and between COM2: and COM4:. While this is the default, it

is not always the best setting. Check your software configuration

instructions to determine the most appropriate IRQ setting.

4. Option Selection

9

Figure 4-1. Header E1 and E2 (IRQ 4 selected).

Headers E3 and E4 select the (normal) single-interrupt-per-board mode or

the multi-interrupt mode, which allows you to share both interrupts on this

card. The multi-interrupt mode also allows you to share the IRQ signal(s) with

other cards that support multiple interrupts.

Figure 4-2. Headers E3 and E4 in Normal Mode.

E3

E4

MN

2

3

4

5

10

11

12

15

CHAPTER 4: Option Selection

10

DUAL PORT RS-232 SERIAL INTERFACE

IMPORTANT

You MUST set up the operating system BEFORE you physically install

the Card.

5.1 Installing the Adapter in Your Operating System

If you are installing an ISA adapter in DOS, OS/2

®

, or QNX, please refer to the

appropriate directory on one of the Serial Utilities Disks for instructions.

5.1.1 W

INDOWS

3.1

X

Please refer to the /WINDOWS sub-directory on the Serial Utilities Diskette for

help files and current information on the installation of the Card in this operating

environment.

5.1.2 W

INDOWS

95/98

For the ISA card, run setup the Serial Utilities Diskette before installing the

card. Make note of the resources that Windows assigns the adapter and set the

adapter to match those resources. Power down the computer and install the

adapter.

5.1.3 W

INDOWS

NT

For the ISA card, run setup on disk two of the Serial Utilities Diskettes before

installing the card. After installing the software, refer to the help file that

automatically comes up for installation instructions.

5.2 Installing the Hardware

The Dual Port RS-232 can be installed in any of the PC expansion slots,

except J8 on the original IBM XT™ and Portable. Follow these steps to install

the card:

1. Remove the PC case.

2. Remove the blank metal slot cover.

3. Gently insert the board.

5. Installation

11

CHAPTER 5: Installation

4. Replace the screw.

5. Replace the cover.

If you wish to change any resources assigned to the adapter, refer to the help

file installed in the Black Box folder in the Start, Programs menu.

Installation is complete.

12

DUAL PORT RS-232 SERIAL INTERFACE

U6

R3

SW1

C1

C3

U3

C8

P1

U4

U1

P2

SW2

U7

J1

1

6

5

9

J4

C9

C5

R2

C4

U5

PORT1

PORT2

E1 E2

2

3

4

5

10

11

12

15

2

3

4

5

10

11

12

15

C2

U2

C6

Y1

U9

U6

M N

E3

E4

1

U10

D1

R4

D2

R5

1

14

13

25

1

6

1

6

5

9

J3

5

9

J2

R1

C7

Appendix: Circuit-Board Design

13

APPENDIX: Circuit-Board Design

A22

A23

A24

A25

A26

A27

A28

A11

A9

A8

A7

A6

A5

A4

A3

AEN

A8

A6

A4

AEN

A3

A5

A7

A9

RESET

A0

A1

A2

2

4

6

8

GND

1

VDO/VSS

A1

A2

A3

A4

Y1

Y2

Y3

Y4

G

74LS244

11

13

15

17

GND

19

VDO/VSS

A1

A2

A3

A4

Y1

Y2

Y3

Y4

G

U5

74LS244

20

+5V

10

GND

WR/

RD/

9

7

5

3

BWR/

BRD/

GND

15

13

11

10

12

14

16

PORT 1

GND

3

5

7

9

12

14

16

18

U5

U1

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

VSS

P>Q

1

10

GND

74LS682

P=Q

VDO

2

4

6

8

11

13

15

17

P0

P1

P2

P3

P4

P5

P6

P7

GND

15

13

11

10

12

14

16

SW2

2

4

6

7

5

3

1

PORT 2

GND

3

5

7

9

12

14

16

18

U4

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

VSS

P>Q

1

10

GND

74LS682

P=Q

VDO

A8

A6

A4

AEN

A3

A5

A7

A9

SW1

9

8

20

19

+5V

18

16

14

12

BRESET

BA0

BA1

BA2

R1

12

Y1

+5V

20

R2

19

8SW2 9

2

1

+5V

VDO

OUT

+5V

1

7

14

8

GND

TXCO

U2

+5V

GND

U3

VDO

VSS

+5V

GND

40

20

XTAL1

XTAL2

MR

CS0

CS1

CS2

DISTR

DOSTR

ADS

RCLK

SIN

CTS

DSR

DCD

RI

A0

A1

A2

D0

D1

D2

D3

D4

D5

D6

D7

DTR

RTS

OUT1

OUT2

CSOUT

DDIS

BAUDOUT

INTRPT

SOUT

GND

+5V

BRESET

BRD/

BWR/

RD1

CTS1

DSR1

DCD1

RI1

BA0

BA1

BA2

8250A

U7

1

2

GND

3

74LS125A

+5V

12

R3

P1

19

1

BRD/

3

4

5

6

7

8

9

2

D0

D1

D2

D3

D4

D5

D6

D7

G

DIR

A1

A2

A3

A4

A5

A6

A7

A8

74LS245

B2

B3

B4

B5

B6

B7

B8

B1

U7

5

6

4

74LS125A

GND

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

DTR1

RTS1

TD1

8250A

U6

VDO

VSS

+5V

GND

17

16

15

14

13

12

11

10

18

20

DB1

DB2

DB3

DB4

DB5

DB6

DB7

DB0

E2

E1

2

E4

E3

U7

8

D2

3

11 2

2

4

6

8

10

12

14

16

2

P2

D6

IRQ15

IRQ10

IRQ11

IRQ12

IRQ2

IRQ3

IRQ4

IRQ5

10

9

74LS125A

3

1

D1

2

R5

R4

12

GND

12

GND

16

17

35

12

13

14

22

21

19

18

25

9

10

36

37

38

39

28

27

26

13

12

U7

74LS125A

B1

B31

P1

16

15

14

13

12

11

10

9

VSS VEE-

MC145406

U8

3

6

8

11

OUTA

OUTB

OUTC

OUTD

V+

ENA

INA

ENB

INB

ENC

INC

END

IND

GND

MC1489

+12

-12V

+5V

+12V

-12V

C8

C9 C6 C1 C2 C3 C4

C5 C7

+

111111111

22

3

+5V

GND

B9

B7

B3

B29

P1

VDO VEE+

+12V

+5V

TD2

RTS2

DTR2

GND

-12V

RD2/

TD2/

CTS2/

RTS2/

DSR2/

DTR2/

+12V

U9

14

2

1

5

4

9

10

12

13

7

GND

2

4

6

8

11

13

15

17

P0

P1

P2

P3

P4

P5

P6

P7

SW1

2

4

6

7

5

3

1

B2

A31

A30

A29

P1

B13

B14

P1

A9

A8

A7

A6

A5

A4

A3

A2

P1

B4

B25

B24

B23

P1

D3

D4

D5

P2

2

3

2

8

5

7

4

6

4

20

J1

J4

J1

J4

J1

J4

J1

J4

J1

J4

J1

J4

DCD2/

RI2/

DCD1/

RI1/

1

8

9

22

1

9

J1

J4

J1

J4

J2

J3

J2

J3

RD1/

TD1/

CTS1/

RTS1/

DSR1/

DTR1/

2

3

8

7

6

4

J2

J3

J2

J3

J2

J3

J2

J3

J2

J3

J2

J3

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

VSS VEE-

MC145406

U10

VDO VEE+

+12V

+5V

TD1

RTS1

DTR1

GND

-12V

1

2

3

4

5

6

7

8

NC

VSS

2

3

2

3

2

3

2

3

2

3

2

3

2

3

1

2

3

4

5

6

7

8

33

32

34

31

24

23

15

30

11

VDO

VSS

40

20

XTAL1

XTAL2

MR

CS0

CS1

CS2

DISTR

DOSTR

ADS

RCLK

SIN

CTS

DSR

DCD

RI

A0

A1

A2

D0

D1

D2

D3

D4

D5

D6

D7

DTR

RTS

OUT1

OUT2

CSOUT

DDIS

BAUDOUT

INTRPT

SOUT

GND

+5V

BRESET

BRD/

BWR/

RD2

CTS2

DSR2

DCD2

RI2

BA0

BA1

BA2

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

DTR2

RTS2

TD2

16

17

35

12

13

14

22

21

19

18

25

9

10

36

37

38

39

28

27

26

1

2

3

4

5

6

7

8

33

32

34

31

24

23

15

30

11

1

3

5

7

9

11

13

15

2

4

6

8

10

12

14

16

1

3

5

7

9

11

13

15

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746

Black Box IC110C User manual

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