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RT-20 Universal Disc Player RS-232 Control Guide Harman Specialty Group 3 Oak Park, Bedford, MA, 01730-1413 USA Customer Service: Telephone: 781-280-0300 | Service Fax: 781-280-0499 | www.lexicon.com Part No. 070-17224 | Rev 0 | 03/05...
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“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.
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.
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...
There are two kinds of transmission data packets that are described below. 3-2-1-1. Command Packets The Command Packets are provided for the Host Controller to request the RT-20 to perform a specific action. Start character COMMAND End character (CR) : 0Dh...
Start character : ’@’, A C K start 0D h ‘@ ’ The RT-20 will send a NAK response packet if the RT-20 has received an incorrect HOST command packet. Start character start N A K 0D h ‘@ ’...
The RT-20/Host Data Packet Transactions can be described in one of the three following sequences: • The HOST sends a command data packet and the RT-20 responds with an ACK or a NAK data packet. • The HOST sends a status request data packet and the RT-20 responds with the corresponding status data packet or NAK if the request is invalid.
C o m m a n d S t a t u s r e q u e s t The RT-20 may reply with an ACK instead of requested status, if the RT-20 cannot send the requested status immediately. 3-3-5-2.
AUTO POWER OFF Enable DVD 1 REMOTE CODE DVD 2 Disable ECO MODE Enable 3-4-2. Specific Commands Command from Host Auto status feedback (The RT-20 default will disable all auto status feedback.) “TVS:0” “PGR:0” “ASP:1” “ASP:2” “ASP:3” “ASP:4” “VMT:0” “VMT:1” “VMT:2”...
3-5. Status Request and Status Response Data Packets 3-5-1. HOST Status request and Status Response/feedback list Status request POWER “PWR:?” TRAY MODE “TRY:?” PLAY MODE “MOD:?” DISC “DSC:?” 3-5-2. HOST Status request and Status Response/feedback list Status request REPEAT “RPT:?” A-B REPEAT “A-B:?”...
Status request SACD MODE “SCD:?” Status request TV SYSTEM “TVS:?” PROGRESSIVE “PGR:?” /INTERLACE ASPECT “ASP:?” VIDEO MUTE “VMT:?” Status request HDMI ON/OFF “HDM:?” AUTO POWER OFF “ATP:?” REMOTE CODE “RC6:?” ECO MODE “ECO:?” 3-5-3. HOST Status request and Status Response/feedback list Send Slave status COUNTER “TIM:?”...
3-5-4. Special Status request and Status Response list Status request Auto status feedback “AST:?” Status request “RV0:?” “RV1:?” Read Version Number “RV2:?” “RV3:?” AST Layer: None Status answer and feedback Layer1 Layer2 Layer3 Disable. Disable. Disable. Enable. Disable. Disable. Disable. Enable.
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COMMAND Auto status feedback @AST:0\x0d @AST:1\x0d @AST:7x0d @AST:2\x0d @AST:3\x0d @AST:4\x0d @AST:5\x0d @AST:6\x0d @AST:7\x0d Notes all layer OFF layer1 ON layer2 ON layer3 ON layer1,layer2 ON layer1,layer3 ON layer2,layer3 ON all layer ON...
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Harman Specialty Group 3 Oak Park, Bedford, MA, 01730-1413 USA Customer Service: Telephone: 781-280-0300 | Service Fax: 781-280-0499 | www.lexicon.com Part No. 070-17224 | Rev 0 03/05...
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