Quatech MPA-200/300, RS-422/485 specification

CIRCUIT TM - TEST MODE (TM)

CONNECTOR NOTATION: TEST MODE

DIRECTION: From DCE

This signal indicates to the DTE that the DCE is in a test condition. The DCE generates this signal when it has received a local loopback or remote loopback signal from the DTE.

Quatech Inc., MPA-200/300 Manual

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Quatech MPA-200/300, RS-422/485 user manual Circuit TM Test Mode TM Connector Notation Test Mode

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 RR2 RR0RR1 RR3 WR2 WR0WR1 WR3 Baud Rate Generator Programming SCC Data Encoding Methods J5 & J6 Interrupt Level Selection Jumper Block ConfigurationsJ4 Interrupt Configuration 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 Connector Notation +TXD,-TXD Circuit AB Signal Ground Connector Notation DgndCircuit CC Data SET Ready DSR Connector Notation +DSR,-DSR Connector Notation +RXD,-RXD Circuit 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,-CTS Circuit 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