Typical Full-Duplex System; Typical Half-Duplex System - National Instruments PCMCIA-232 Getting Started

Appendix A Serial Port Information
Tx
Rx
Tx
Rx
PCMCIA Serial for Windows NT
Slave 1
Tx
Rx
Figure A-1. Typical Full-Duplex System
Half Duplex
A typical half-duplex multidrop bus architecture also involves a
master-slave protocol. In a half-duplex system, all transmitters and
receivers are connected to the same transmission line. A half-duplex system
is often referred to as a two-wire system. Figure A-2 shows a typical
half-duplex system.
Slave 1
Tx
Rx
Figure A-2. Typical Half-Duplex System
Slave 2
Tx
Rx
Slave 2
Tx
Rx
A-4
Slave n
Tx
Rx
Slave n
Tx
Rx
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