Quatech RS-485 user manual Half/full-duplex and Auto-Toggle selection

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WARNING:

When operating in half-duplex mode, the transmitter drivers must be disabled before receiving any data. Failure to do so may result in multiple active output drivers being connected together, which may cause damage to the board, the computer, and the external device.

J14

J15

J16

J14

J15

J16

J14

J15

J16

J14

J15

J16

Jumpers J14-16

TGL0_SEL0

TGL0_SEL1

RXEN0_SEL

TGL0_SEL0

TGL0_SEL1

RXEN0_SEL

TGL0_SEL0

TGL0_SEL1

RXEN0_SEL

TGL0_SEL0

TGL0_SEL1

RXEN0_SEL

Half-Duplex(DTR) Operation

Half-Duplex(RTS) Operation

Full-Duplex Operation

Auto-Toggle Operation

Figure 20 --- Half/full-duplex and Auto-Toggle selection

Quatech DSC-200/300 User's Manual

36

Image 38

Contents DSC-200/300 Date of Purchase Model Number Page Declaration of Conformity 2 AUX0SEL1,0, AUX1SEL1,0 J12,11,19,18 IND Option --- Surge Suppression UpgradeChanging Resource Settings with Device Manager 4 TGL0SEL1,0, TGL1SEL1,0 J15,14,22,21External Connections Half-Duplex/Full-Duplex/Auto-Toggle SelectionGeneral Information Features DSC-200/300 Product Series SummarySignal Connections Full-duplex/Half-duplex OperationJumpers J10-J23 define the options for this card RXEN0SEL, RXEN1SEL J16 1 CTS0SEL, CTS1SEL J10,17RCLK0SEL, RCLK1SEL J13 Enable Scratchpad Register SPAD, J2 Clock Rate and Optional RegistersClock multiplier jumper options Hardware Installation Base Address and Interrupt Level IRQ Enabling the Special Registers Interrupt Status RegisterQuatech Modem Control Register Quatech Modem Control RegisterOptions Register Bit Name DescriptionClock Rate Multiplier RR1 RR0Windows Millennium Windows Windows Windows Windows NT Viewing Resources with Device Manager Quatech DSC-200/300 PCI Two-Port RS-422/RS485 Serial Adapter Adapter Data Rate Multiplier Application. This mode is useful for legacy Used when external handshaking or Page OS/2 DOS and other operating systemsQTPCI.EXE QTPCI.EXE Expert Mode display RTS/CTS Handshake Jumpers J10-12Rclk TclkAUXIN/AUXOUT Loopback AUXIN/AUXOUT loopbackHalf/full-duplex and Auto-Toggle selection Termination Resistors RS-422/485 TerminationDSC-200/300 connector definitions RS-422/485 Peripheral ConnectionPCI Resource Map Specifications Computer will not boot up