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Lexicon
RT-20 Universal Disc Player RS-232 Control Guide
Manufactured under license from Dolby Laboratories. Dolby and the double-D symbol are trademarks of Dolby
Laboratories. Confidential unpublished works. © 1992-1997 Dolby Laboratories. All rights reserved.
HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.
DTS and DTS 96/24 are trademarks of Digital Theater Systems, Inc.
SACD and the SACD logo are trademarks of Sony Electronics, Inc.
TosLink is a registered trademark of Toshiba Corporation.
Lexicon, LOGIC7, and the L7 logo are registered trademarks of Harman International Industries, Inc. U.S. Patent Nos. D454,553;
D454,860; 5,796,844; 5,870,480 and other worldwide patents issued and pending.
This product incorporates copyright protection technology that is protected by method claims of certain U.S. patents and other intellectual
property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by
Macrovision Corporation, and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision
Corporation. Reverse engineering or disassembly is prohibited.
© 2005 Harman Specialty Group. All rights reserved.
This document should not be construed as a commitment on the part of Harman Specialty Group. The information it contains is
subject to change without notice. Harman Specialty Group assumes no responsibility for errors that may appear within this document.
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Part No. 070-17224 | Rev 0 | 03/05
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Table of Contents
1.
Introduction ...............................................................................................................................................................................3
1-1. Purpose ..............................................................................................................................................................................3
1-2. References.........................................................................................................................................................................3
2. System Description .................................................................................................................................................................3
2-1. Overview ............................................................................................................................................................................3
2-2. Block Diagram ...................................................................................................................................................................3
2-3. RT-20 RS-232 Connector Pin Definition........................................................................................................................3
3. Detailed Description.................................................................................................................................................................4
3-1. Connection format.............................................................................................................................................................4
3-1-1. Physical connection..................................................................................................................................................4
3-2. Transmission data packet formats ...................................................................................................................................4
3-2-1. Transmission data packets from the HOST to the RT-20 .....................................................................................4
3-2-1-1 Command Packets .........................................................................................................................................4
3-2-1-2. Status Request Packets..................................................................................................................................4
3-2-2. Response data packets from the RT-20 to the HOST .........................................................................................5
3-2-2-1. ACK/NAK Response Packets .......................................................................................................................5
3-2-2-2. Auto Status Feedback Packets ......................................................................................................................5
3-3. Data Transaction Sequencing and Timing Requirements ...........................................................................................6
3-3-1. Data Packet Transaction Sequencing Requirements ...........................................................................................6
3-3-2. Data Transaction Timing Requirements .................................................................................................................6
3-3-3. Specific Requirements for Auto Status Feedback..................................................................................................6
3-3-4. Example of the transactions .....................................................................................................................................6
3-3-5. Examples of HOST/RT-20 handshaking................................................................................................................7
3-3-5-1. Example of successful handshaking..............................................................................................................7
3-3-5-2. Examples of handshaking errors....................................................................................................................7
3-4. Commands .......................................................................................................................................................................8
3-4-1. HOST Command list ................................................................................................................................................8
3-4-2. Specific Commands............................................................................................................................................... 10
3-5. Status Request and Status Response Data Packets ................................................................................................. 11
3-5-1. HOST Status request and Status Response/feedback list AST Layer: 1 ........................................................ 11
3-5-2. HOST Status request and Status Response/feedback list AST Layer: 2........................................................ 11
3-5-3. HOST Status request and Status Response/feedback list AST Layer: 3....................................................... 12
3-5-4. Special Status request and Status Response list AST Layer: None................................................................ 13
3-6. Status Feedback ........................................................................................................................................................... 14
3-7. Data Packet COMMAND List..................................................................................................................................... 16
