Introduction; Purpose; References; System Description - Lexicon RT-20 Control Manual

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

HOST (Master- System
Controller)
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
N.C.
TxD (output)
RxD (input)
N.C.
GND
N.C.
N.C.
N.C.
N.C.
3
RS232C cable (straight)
D-Sub Pin
1
2
3
4
5
6
7
8
9
RT-20 (SLA VE Device)
Connector
D-SUB (9pin, male)