Half- or full-duplex selection | Quatech RS-422 guide

Jumpers J6, J8

Tx ENABLE	6	3	Rx ENABLE
Tx ENABLE	5	2	RTS	Half-Duplex(DTR) Operation
Tx ENABLE	4	1	DTR
Tx ENABLE	6	3	Rx ENABLE
Tx ENABLE	5	2	RTS	Half-Duplex(RTS) Operation
Tx ENABLE	4	1	DTR
Tx ENABLE	6	3 Rx ENABLE
Tx ENABLE	5	2	RTS	Full-Duplex Operation
Tx ENABLE	4	1	DTR

Figure 23 --- Half- or full-duplex selection

	AUXOUT	RS-422 or	+
		RS-485	-
		Driver
		TXEN
6	3
5	2		AUXIN	RS-422 or
5	2		AUXIN	RS-485
				Receiver
4	1			RXEN
XCLK				RXEN
XCLK
RTS
CTS
RCLK
DTR		6	3
DSR
DCD		5	2
RI		5	2
RI

4 1

+

-

Figure 24 --- Output control block diagram
DSCLP-200/300 User's Manual	29

Image 34

Quatech RS-422 user manual Half- or full-duplex selection

Contents

DSCLP-200/300 Page Serial Number Declaration of Conformity Table of Contents General Information Hardware Configuration RS-422 or RS-485 Signal Line Termination Signal Connections Full-duplex/Half-duplex Operation 2 AUX0SEL1,0, AUX1SEL1,0 J12,11,19,18 1 CTS0SEL, CTS1SEL J10,17RCLK0SEL, RCLK1SEL J13 RXEN0SEL, RXEN1SEL J16 Enable Scratchpad Register SPAD, J24 TGL0SEL1,0, TGL1SEL1,0 J15,14,22,21 Clock Rate and Optional Registers Enable scratchpad registers Force High-Speed Uart Clock X2 or X4, J4-J5 X4 mode Hardware Installation Jumper/connector locations Address Map and Special Registers Base Address and Interrupt Level IRQ Enabling the Special Registers Interrupt Status Register Quatech Modem Control Register Quatech Modem Control Register Options Register Enhanced Serial Adapter Identification Clock Rate Multiplier RR1 RR0 Windows Configurations Windows Millennium Windows Windows Windows Using the New Hardware Found Wizard Viewing Resources with Device Manager Page Page Page OS/2 Other Operating SystemsWindows NT DOS and other operating systems QTPCI.EXE Basic Mode display QTPCI.EXE Expert Mode display External Connections Jumper/Channel correspondence RTS/CTS Handshake Rclk Xclk AUXIN/AUXOUT Loopback Half-Duplex/Full-Duplex Selection Half- or full-duplex selection Termination Resistors RS-422/485 Line termination resistance values DSCLP-200/300 connector definitions RS-422/485 Peripheral Connection PCI Resource Map INTA# Specifications With 64-byte FIFOs optional Troubleshooting Computer will not boot up DSCLP-200/300 Revision December