Lexicon RT-20 Betriebsanweisung
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1. Introduction
1-1. Purpose
This document was written as a reference specification for the Lexicon RT-20 Universal Disc Player RS-232
interface.
1-2. References
Refer to the RT-20 User Guide for information about the RS-232 connector and RT-20 functionality.
RT-20 User Guide p/n 070-17261.
2. System
Description
2-1. Overview
The RT-20 RS-232 interface has been designed as a Master-Slave communication protocol, in which the RT-20 is
the slave device. The Master-system controller is referred to as the HOST device.
2-2. Block Diagram
2-3. RT-20 RS-232 Connector Pin Definition
The RT-20 serial RS-232 connector is a male 9-pin D-sub connector. The pin definitions are listed below.
Signal name
D-Sub Pin
N.C. 1
TxD (output)
2
RxD (input)
3
N.C. 4
GND
GND
5
N.C.
6
N.C.
7
N.C.
8
N.C.
9
HOST (Master- System
Controller)
RT-20 (SLAVE Device)
RS232C cable (straight)
Connector
D-SUB (9pin, male)