MPA-200/300 Version March | Quatech RS-422/485 guide

MPA-200/300

User's Manual

Version 5.31

March 2004

Part No. 940-0038-531

Image 44

Quatech RS-422/485 user manual MPA-200/300 Version March

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/DRQ SCC General Information Accessing the registers RR0 RR1RR2 RR3 WR0 WR1WR2 WR3 Baud Rate Generator Programming SCC Data Encoding Methods Jumper Block Configurations J4 Interrupt ConfigurationJ5 & J6 Interrupt Level Selection IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 IRQ10 IRQ11 IRQ12 IRQ14 IRQ15 J10 Transmit DMA Channel Selection J11 Receive DMA Channel Selection J7 Line Driver Control Selection J8 Synca to Rlen control Synca Rlen OUT Addressing Base Address = 3F8HPage Interrupts Direct Memory Access Page Reqa Configuration Register D1 -RXSRC, Receive DMA Source D0 -TXSRC, Transmit DMA Source Communications Register TM ST Llen Rlen Rcken Tcken Rxden Txden D1 -RECEIVER Enable D0 -TRANSMITTER Enable DTE / DCE Configuration DTE Configuration Rrclk Rtclk Trxca Tclk Ttclk DCE Configuration DCE Clock Configuration External Connections DTR DTR/REQA DSR Dcda +RRCLK Trxc Test Mode CTS Ctsa +DSR Dcda Test Mode Null-Modem Cables Circuit AB Signal Ground Connector Notation Dgnd Circuit CC Data SET Ready DSR Connector Notation +DSR,-DSRConnector Notation +TXD,-TXD Connector Notation +RXD,-RXD Connector Notation +RTCLK,-RTCLK Connector Notation +RRCLK,-RRCLKCircuit CA Request to Send RTS Connector Notation +RTS,-RTS Circuit CB Clear to Send CTS Connector Notation +CTS,-CTS Circuit RL Remote Loopback RL Connector Notation Rlbk Circuit CD DTE Ready DTR Connector Notation +DTR,-DTRCircuit LL Local Loopback LL Connector Notation Llbk Circuit TM Test Mode TM Connector Notation Test Mode Specifications MPA-200/300 Version March