SeaLevel ACB-104 Manuale utente

ACB-104

User Manual | 3512

Contents

CONTENTS...........................................................................................................................................................2

INTRODUCTION ................................................................................................................................................... 3

BEFORE YOU GET STARTED ...............................................................................................................................4

CARD SETUP ........................................................................................................................................................5

INSTALLATION ..................................................................................................................................................10

TECHNICAL DESCRIPTION ...............................................................................................................................12

SPECIFICATIONS ...............................................................................................................................................16

APPENDIX A – TROUBLESHOOTING................................................................................................................17

APPENDIX B – HOW TO GET ASSISTANCE .....................................................................................................18

APPENDIX C – ELECTRICAL INTERFACE ........................................................................................................19

APPENDIX D – DIRECT MEMORY ACCESS......................................................................................................21

APPENDIX E – ASYNCHRONOUS COMMUNICATIONS ..................................................................................22

APPENDIX F – SILK SCREEN ............................................................................................................................24

WARRANTY ........................................................................................................................................................25

Introduction

Overview

The Sealevel Systems ACB-104 provides the PC with one high-speed RS-232/530/422/485

synchronous/asynchronous port. The ACB-104 can be used in a variety of sophisticated communications

applications such as SDLC, HDLC, X.25, Bi-Sync, Mono-Sync, and high-speed asynchronous.

Before You Get Started

What’s Included

The ACB-104 is shipped with the following items. If any of these items are missing or damaged, contact

the supplier.

•(1) ACB-104 Adapter

•(1) DB-25 Cable Assembly

•(1) Nylon Hardware Kit

Advisory Conventions

Warning

The highest level of importance used to stress a condition where damage could result to the

product, or the user could suffer serious injury.

Important

The middle level of importance used to highlight information that might not seem obvious or a

situation that could cause the product to fail.

Note

The lowest level of importance used to provide background information, additional tips, or other

non-critical facts that will not affect the use of the product.

Factory Default Settings

The ACB-104 factory default settings are as follows:

Base Address

DMA Selection

IRQ

Electrical Specification

238

TX: 1 / RX: 3

RS-530/422

To install the ACB-104 using factory default settings, refer to the section on Installation.

For your reference, record installed ACB-104 settings below:

Base Address

DMA Selection

IRQ

Electrical Specification

Card Setup

The ACB-104 contains several jumper straps for each port, which must be set for proper operation.

Port Enable Disable

The ACB-104 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’.

Address Selection

The ACB-104 occupies 8 consecutive I/O locations. A DIP-switch (SW1) is used to set the base address for

these locations. The ACB-104 can reside in any I/O location between 100 and 3F8 Hex. 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.

Address Binary Switch Settings

A9----------A0 1 2 3 4 5 6 7

238-23F 1000111XXX Off On On On Off Off Off

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

300-307 1100000XXX Off Off On On On On On

328-32F 1100101XXX Off Off On On Off On Off

3E8-3EF 1111101XXX Off Off Off Off Off On Off

Figure 1 - Address Selection Table

The following illustration shows the correlation between the DIP-switch setting and the address bits used

to determine the base address. In the example below, the address 300 Hex through 307 Hex is selected.

300 Hex = 11 0000 0XXX in binary representation.

Figure 2 - DIP-switch Illustration

Setting the switch ‘On’ or ‘Closed’ corresponds to a ‘0’ in the address, while leaving it ‘Off’ or ‘Open’

corresponds to a ‘1’.

The relative I/O address of the ACB-104 registers are as follows:

•Base+0 Channel A Data Port

•Base+1 Channel A Control Port

•Base+2 Channel B Data Port

•Base+3 Channel B Control Port

•Base+4 Board Control / Status Port

•Base+5 Reset TCIRQ

Transmit Clock Header E5

Header E5 sets the input/output clock modes for the transmit clock (TXC). If the transmit clock is to be an

input, place the jumper to cover both pins. This board does not support transmit clock as an output.

RS-485 Mode Enable Header E4

E4 position ‘TE’ determines whether the RS-485 transmit driver is enabled by the Enhanced Serial

Communications Controller (ESCC) signal Request To Send (RTS) or always enabled. With the jumper

installed, RTS enables the driver. Removing the jumper enables the driver regardless of RTS. This jumper

should only be installed if you are running the board in a multi-drop polled environment such as RS-485, and

you have software that knows how to ‘talk’ on the RS-485 bus. For normal point-to-point RS-530 and RS-

422, remove this jumper.

E4 position ‘ED’ is used to control the RS-485 enable/disable functions for the receiver circuit and determine

the state of the RS-422/485 driver. The RS-485 ‘Echo’ is the result of connecting the receiver inputs to the

12 3 4 5 67

OFF

A9 A3

transmitter outputs. Every time a character is transmitted; it is also received. This can be beneficial if the

software can handle echoing (i.e. using received characters to throttle the transmitter) or it can confuse

the system if the software does not. To select the ‘No Echo’ mode select silk-screen position ‘ED’.

Electrical Interface Selection Headers E8 &E9

The ACB-104 has the ability to be used in either RS-232 or RS-530/422/485. This is selectable via two 24

pin DIP-shunts at E8 & E9. Please use the following illustration to aid in the configuration of your electrical

interface.

Figure 3 Headers E8 & E9, Electrical Interface Selection

DMA Channel Selection Headers E2 & E3

Headers E2 & E3 select Direct Memory Access (DMA) mode of operation. Each channel of the Enhanced

Serial Communications Controller (ESCC) will function in half duplex or full duplex DMA modes. Full duplex

means that DMA can be used for simultaneous transmit and receive. Half-duplex DMA means that you can

either transmit, or receive with DMA, but not simultaneously. The 85230 has two signals that correspond

to DMA request signals, WAIT/REQ and DTR/REQ. E2 corresponds to the SCC signal WAIT/REQ and E3

corresponds to DTR/REQ. WAIT/REQ and DTR/REQ can be programmed to serve as DMA request lines

(DRQ) by setting the appropriate bits in Write Register 1 and Write Register 14 in the 85230. WAIT/REQ (E2)

can be programmed for Transmit or Receive DMA transfers and DTR/REQ (E3) can be programmed for

Transmit Only. For additional information on the programming of the 85230 please refer to the Zilog ESCC

User’s Manual. Please note that each DMA channel is selected by two jumpers. Only one DMA channel may

be selected for each header block.

If DMA is not used, remove all of the jumpers on E2 & E2 and remove jumper at E1.

RS-422RS-232 RS-422RS-232

E8 E9E8E9

RS-422RS-232

Figure 4 - DMA Selection Headers E2 & E3

The DMA Channel 2 can only be used if the external DMA drivers are turned off. Please refer to

the toolkit (available through Sealevel’s Technical support) for examples.

DMA Jumper Option Tables

The following tables show the jumper setting examples for each mode of DMA:

No DMA

Option

Ch.A No DMA

None

Single Channel DMA (Half Duplex Only)

Option

DMA Channel 0

None

DMA Channel 1

None

DMA Channel 2

None

DMA Channel 3

None

Full Duplex

Option

DMA Ch.1 Receive Data

DMA Ch.3 Transmit Data

DMA Ch.0 Receive Data

DMA Ch.2 Transmit Data

0 0 1 1 2 2 3 3

DMA Channel 2 can only be used if the external DMA drivers are turned off. Please refer to the

Toolkit available from Sealevel’s Technical Support for examples

DMA Enable Header E1

Header E1 selects whether the DMA tri-state drivers are enabled permanently, (position A) disabled

permanently (jumpers removed), or which DMA enable control port bit is used to enable the DMA hardware

request and acknowledge signals. Removing the jumper disables the drivers and no DMA can be performed.

The power on reset signal resets or disables the DMA software enable signal.

Figure 5 - DMA Enable Header E1

Base+4 Position D7 enables DMA

RTSB enables DMA

Selects Always Enable

Please refer to Section 4 for software bit definitions and examples of DMA driver control.

IRQ Selection Header E7

Header E7selects the interrupt request (IRQ) line for the card. If no interrupt is desired, remove the jumper.

Figure 6 - IRQ Header E7

IRQ Mode Header E6

Header E6 ‘N’ indicates the (N)ormal, single interrupt mode. Position ‘M’ indicates the inclusion of a 1K ohm

pull-down resistor required on one port when sharing interrupts with another card. For shared interrupt

mode, set one board to ‘M’ and all other adapters sharing an IRQ should have neither ‘N’ or ‘M’ in place. This

mode allows more than one board to access a single IRQ.

S1 S2 A

3 4 5 7 9 10 11 12 15

Position ‘T’ on E6 enables the DMA Terminal Count Interrupt. Setting this jumper allows the

selected DMA channel to generate an interrupt once the DMA Terminal Count has been reached.

See Section 4 for the status bit (TC STAT) position and refer to the toolkit (available through

Sealevel’s Technical support) for examples.

When using multiple cards on one IRQ in shared mode, be sure that only one port has the ‘M’

jumper set, providing the necessary pull-down resistor.

Figure 7 - IRQ Mode Header

Installation

Software Installation

Windows Installation

Do not install the Adapter in the machine until the software has been fully installed.

Only users running Windows 7 or newer should utilize these instructions for accessing and

installing the appropriate driver via Sealevel’s website. If you are utilizing an operating system

prior to Windows 7, please contact Sealevel by calling 864.843.4343 or emailing

[email protected] to receive access to the proper driver download and installation

instructions.

1. Begin by locating, selecting, and installing the correct software from the Sealevel

software driver database.

2. Select the Part Number (3512) for your device from the listing.

3. Click the ‘Download Now’ button for SeaMAC for Windows.

4. The setup file will automatically detect the operating environment and install the

proper components.

T N M

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