Quatech MPA-200/300, RS-422/485 user manual Table of Contents

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TABLE OF CONTENTS

 

1 INTRODUCTION

2

2 HARDWARE INSTALLATION

4

3 SCC GENERAL INFORMATION

5

3.1

Accessing the registers

6

3.2 Baud Rate Generator Programming

9

3.3 SCC Data Encoding Methods

10

4 JUMPER BLOCK CONFIGURATIONS

11

4.1

J4 - Interrupt Configuration

11

4.2

J5 & J6 - Interrupt Level Selection

11

4.3

J10 - Transmit DMA Channel Selection

12

4.4

J11 - Receive DMA Channel Selection

13

4.5

J7 - Line Driver Control Selection

13

4.6 J8 - SYNCA to RLEN control

14

5 ADDRESSING

15

6 INTERRUPTS

17

7 DIRECT MEMORY ACCESS

18

7.1

Using Terminal Count to Generate an Interrupt

20

8 CONFIGURATION REGISTER

21

9 COMMUNICATIONS REGISTER

23

10 DTE / DCE Configuration

25

10.1 DTE Configuration

26

10.2 DCE Configuration

27

11 EXTERNAL CONNECTIONS

29

11.1 MPA-200 and EIA-530 Compatibility

32

11.2 Null-Modem Cables

32

12 DEFINITION OF INTERFACE SIGNALS

33

13 SPECIFICATIONS

37

Quatech Inc., MPA-200/300 Manual

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Contents MPA-200/300 QUATECH, INCPage Warranty Information Page Compliances Electromagnetic Emissions Table of Contents Quatech Inc., MPA-200/300 Manual Introduction MPA-200 board drawing Hardware Installation IRQ DMA/DRQSCC General Information Accessing the registers RR2 RR0RR1 RR3WR2 WR0WR1 WR3Baud Rate Generator Programming SCC Data Encoding Methods J5 & J6 Interrupt Level Selection Jumper Block ConfigurationsJ4 Interrupt Configuration IRQ3 IRQ4 IRQ5 IRQ6 IRQ7IRQ10 IRQ11 IRQ12 IRQ14 IRQ15 J10 Transmit DMA Channel SelectionJ11 Receive DMA Channel Selection J7 Line Driver Control SelectionJ8 Synca to Rlen control Synca Rlen OUTAddressing Base Address = 3F8HPage Interrupts Direct Memory Access Page Reqa Configuration Register D1 -RXSRC, Receive DMA Source D0 -TXSRC, Transmit DMA SourceCommunications Register TM ST Llen Rlen Rcken Tcken Rxden TxdenD1 -RECEIVER Enable D0 -TRANSMITTER EnableDTE / DCE Configuration DTE Configuration Rrclk Rtclk Trxca Tclk TtclkDCE Configuration DCE Clock Configuration External Connections DTR DTR/REQA DSR Dcda +RRCLK Trxc Test Mode CTS Ctsa +DSR DcdaTest Mode Null-Modem Cables Connector Notation +TXD,-TXD Circuit AB Signal Ground Connector Notation DgndCircuit CC Data SET Ready DSR Connector Notation +DSR,-DSR Connector Notation +RXD,-RXDCircuit CA Request to Send RTS Connector Notation +RTS,-RTS Connector Notation +RTCLK,-RTCLKConnector Notation +RRCLK,-RRCLK Circuit CB Clear to Send CTS Connector Notation +CTS,-CTSCircuit CD DTE Ready DTR Connector Notation +DTR,-DTR Circuit LL Local Loopback LL Connector Notation LlbkCircuit RL Remote Loopback RL Connector Notation Rlbk Circuit TM Test Mode TM Connector Notation Test Mode Specifications MPA-200/300 Version March