Quatech MPA-200/300 user manual Connector Notation +RTCLK,-RTCLK, Connector Notation +RRCLK,-RRCLK

Page 40

CIRCUIT DB - TRANSMIT ELEMENT TIMING (TxClk - DCE Source)

￿CONNECTOR NOTATION: +RTCLK,-RTCLK

￿DIRECTION: From DCE

This signal, generated by the DCE, provides the DTE with element timing information pertaining to the data transmitted to the DCE.

CIRCUIT DD - RECEIVER ELEMENT TIMING (RxClk - DCE Source)

￿CONNECTOR NOTATION: +RRCLK,-RRCLK

￿DIRECTION: From DCE

This signal, generated by the DCE, provides the DTE with element timing information pertaining to the data transmitted by the DCE.

CIRCUIT CA - REQUEST TO SEND (RTS)

￿CONNECTOR NOTATION: +RTS,-RTS

￿DIRECTION: To DCE

This signal controls the data channel transmit function of the local DCE and, on a half-duplex channel, the direction of the data transmission of the local DCE.

CIRCUIT CB - CLEAR TO SEND (CTS)

￿CONNECTOR NOTATION: +CTS,-CTS

￿DIRECTION: From DCE

This signal indicates to the DTE whether the DCE is conditioned to transmit data on the communication channel.

CIRCUIT CF - CARRIER DETECT (CD)

￿CONNECTOR NOTATION: +CD,-CD

￿DIRECTION: From DCE

This signal indicates to the DTE whether the DCE is conditioned to receive data from the communication channel, but does not indicate the relative quality of the data signals being received.

Quatech Inc., MPA-200/300 Manual

34

Image 40
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 RR0 RR1RR2 RR3WR0 WR1WR2 WR3Baud Rate Generator Programming SCC Data Encoding Methods Jumper Block Configurations J4 Interrupt ConfigurationJ5 & J6 Interrupt Level Selection 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 Circuit AB Signal Ground Connector Notation Dgnd Circuit CC Data SET Ready DSR Connector Notation +DSR,-DSRConnector Notation +TXD,-TXD Connector Notation +RXD,-RXDConnector 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,-CTSCircuit LL Local Loopback LL Connector Notation Llbk Circuit CD DTE Ready DTR Connector Notation +DTR,-DTRCircuit RL Remote Loopback RL Connector Notation Rlbk Circuit TM Test Mode TM Connector Notation Test Mode Specifications MPA-200/300 Version March