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“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.
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3 Oak Park
Bedford, MA 01730-1413 USA
Telephone: 781-280-0300
Fax: 781-280-0490
www.lexicon.com
Customer Service
Telephone: 781-280-0300
Sales Fax: 781-280-0495
Service Fax: 781-280-0499
2. Sys tem Des cripti on........................................................................................ ..................................... ....................................3
3. Detai led Des cript ion......................... ............................................... ........................................... .......................................... ....4
3-2. Tran smissi on dat a pa cket fo rmats.......................................................... ........................................... ..............................4
3-2-1. Tran smissi on dat a pa ckets from th e HOST to the RT -20...................................................................... ...............4
3-2-1-1 Com mand Pa cket s................................................................ ........................................... ..............................4
3-2-1-2. S tatus Request Packets............................................... ............................................... ................................. ...4
3-2-2. Respo nse dat a pa cket s from the R T -20 to the HO ST................................................................ .........................5
3-2-2-1. AC K/NAK R espon se Pack ets......................................................... .......................................... ....................5
3-2-2-2. Auto S tatus Feedback Packets....................................................................................... ...............................5
3-3. Data Transaction Sequencing and Timing Requiremen ts....................................................................... ....................6
3-3-1. Data Packe t T ransac tion Se quencin g Requ irement s............................................................................ ...............6
3-3-2. Data T ransa ction T iming R equire ments........................................................................................................ .........6
3-3-3. Specific Requiremen ts for Auto S tatus Feedback..................................................................................................6
3-3-4. Example of the transa ctions............................................................ ........................................... ..............................6
3-3-5. Example s of HOS T/RT - 20 hand shakin g............................................................ ........................................... .........7
3-3-5-1. Example of succ essful handsh aking ..................................................... .......................................... ...............7
3-3-5-2. Example s of han dshakin g erro rs........................................................... ................................................ .........7
3-4-2. Spe cific C ommand s......................................................... ................................................ ......................................10
3-5. S tatus R equest a nd S tatu s Respon se Data Packet s.................................................................................... .............11
3-5-1. HOST S tatus request and S tatus Response/feedback list AST Layer: 1...................................................... ..11
3-5-2. HOST S tatus request and S tatus Response/feedback list AST Layer: 2...................................... ..................11
3-5-3. HOST S tatus request and S tatus Response/feedback list AST Layer: 3...................................... .................12
3-5-4. Special S tatus request and S t atus Response list AST Layer: None.................................................... ............13
3-6. S tatus F eedback................................................................................................... ............................................ ............14
3-7. Data Packet COMM AND Li st.................................................... ...................................................... ...........................16
2
5
6
7
8
9
1. Introduction
1-1. Purpose
This document was written as a reference specific ation 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 R S-232 connector and RT -20 functionality.
RT-20 U ser 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 R T -20 is
the slave device. The Master-system controller is referred to as the HOST device.
2-2. Block Diagram
HOST (Master- System
RS232C cable (straight)
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 D-Sub Pin
N.C. 1
TxD (output) 2
RxD (input) 3
N.C. 4
GND
N.C.
N.C.
N.C.
N.C.
RT-20 (SLAVE Device)
Connector
D-SUB (9pin, male)
3
3. Detailed Description
The RS-232 hardware interface specification between the HOST and the RT -20 is described below .
3-1. Connection format
3-1-1. Physical connection
HOST RT-20
TxD
RxD
GND
(Serial Port settings)
Baud Rate : 9600bps
Data Bit s : 8bit
Parity : None
S top bit : 1bit
Handshaking : None
3-2. Transmission data packet formats
3-2-1. T ransmission data p ackets f rom the HOST to the RT -20
There are two kinds of transmission data packet s that are described below .
3-2-1-1. Command Packets
The Command Packets are provided for the Host Con troller to request the RT -20 to perfor m a specific action.
Star t character : ’@’
COMMAND : see “Data Packet COMMAND List”on page 16
End character (CR) : 0Dh
Start
‘@
’
3-2-1-2. Status Request Packets
The Status Request packets are provided for the Host Cont roller to request the RT-20 to report specific
operating statuses.
Star t character : ’@’
Request status : see “Status Request and S tatus Response Dat a Packets” on page 1 1
Request character : ‘?’
End character (CR) : 0Dh
Start
‘@
’
COMMAND
R equest status
RxD
TxD
GND
End
0D h
End
‘?’
0D h
4
3-2-2. Response dat a packet s from the RT -20 to the HOST
The RT -20 can respond to the HOST in a synchronous and asynchronous mode. The two different response
packets are described below .
3-2-2-1. ACK/NAK Response Packets
The RT-20 provides an ACK (acknowledge) response to the HOST when the RT-20 has received a correct
command packet, and the HOST command packet has requested no other status data.
Start character : ’@’, ACK : 06h, End character (CR) : 0Dh
st art
‘
’
ACK
06h
CR
0Dh
The RT- 20 will send a NAK response packet if the RT -20 has received an incorrect HOST command p acket.
Star t character : ’@’, NAK : 15h, End character (CR) : 0Dh
st art
‘
’
NAK
15h
CR
0Dh
3-2-2-2. Auto Status Feedback Packet s
The RT-20 will send to the HOST asynchronous status feedback data packets when applicable RT-20 status
changes. The asynchronous status has been divided into levels or groups. The HOST can enable each of the
status feedback groups independently .
Star t character : ’@’
Answer character : see “St atus Feedback” on page 14
End character (CR) : 0Dh
Start
‘@
’
Status answer
End
0Dh
5
3-3. Data T ransaction Sequencing and Timing Requirements
3-3-1. Data Packet Tr ansaction Sequencing Requirements
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 respond s with an AC K 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 in valid.
• The RT-20 sends an auto status feedback data packet if the corresponding RT-20 stat us has changed
(The HOST is not required to respond to the R T -20).
3-3-2. Dat a Transact ion Timing Requirements
Each of the HOST/RT -20 dat a transactions must meet the following timing requirements:
Response packet transmission (ACK, NAK or Status) from the RT-20 will be initiated approximately within
•
50ms following the end of the HOST co mmand packet and transmission will be completed within 500ms
following the end of the HOST command packet.
• The HOST should not transmit a command or status request data pa cket until the RT -20 has responded to
the previously sent command. A new command or status request data packet may be initiated if the RT -20
has been unresponsive for at least 1s.
• The RT -20 will c omplete an auto st atus feedback data packet w ithin 500ms.
3-3-3. Specific Requirement s for Auto S tatus Feedback
The following items detail specific requirements for the Auto S tatus Feedback data tran sactions.
The RT -20 Auto S tatus Feedback has been grouped into three layers: 1, 2 and 3:
• Layer 1 is the highest priority status. Layer 2 is the second hig hest priority. Layer 3 is assigned the lowest
priority .
• Each layer is independently enabled or disabled by the HOST. The RT-20 will disable all three layers by
default.
• The RT-20 initiates the Auto Status Feedback transaction when the corr esponding RT-20 status has
changed.
3-3-4. Example of the transactions
HOST RT-20
Command
TxD RxD
max. 0.5sec
ACK or NAK
RxD TxD
a transaction a transaction
Example Data Packet Transactions
Status request
max. 0.5s ec
Status
6
p
p
A
A
3-3-5. Examples of HOST/RT -20 ha ndshaking
3-3-5-1. Example of successful handshaking
Com mand
Status
request
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. Examples of handshaking errors
RT-20 HOST
Com mand
acce
Request
acce
Status
answer
Changed
status
feedback
table
CK
table
uto status
Com mand
Status
request
RT-20 HOST
Com mand
incorrect
NAK
Request
incorrect
NAK
7
3-4. Commands
The following tables detail the available HOST commands.
3-4-1. HOST Comma nd list
Command Reply from RT -20
POWER
TRA Y
STOP “STP:0” ACK
PLAY “PLY:0” ACK
PAUSE “PPS:0” ACK
SLOW FWD “PSF:0” ACK
SLOW REV “PSR:0” ACK
FAST FWD “PFF:0” ACK
FAST REV “PFR:0” ACK
NEXT “GOT:1” ACK
PREV “GOT:2” ACK
STEP Toggle “PST:0” ACK
SEARCH Toggle “SCH:0” ACK
REPEAT Step “RPT:0” ACK
A-B REPEA T Step “A-B:0” ACK
PROGRAM Toggle “PRG:0” ACK
RANDOM Step “RDM:0” ACK
MARKER Toggle “MRK:0” ACK
PAGE
OFF “PWR:1”
ON “PWR:2”
Toggle “TRY:0”
OPEN “TRY:1”
CLOSE “TRY:2”
+ “PAG:1”
- “PAG:2”
ACK
ACK
ACK
8
Command Reply from RT -20
SETUP Toggle “OSD:0” ACK
TOP MENU T oggle “MNU:1” ACK
MENU Toggle “MNU:0” ACK
SUBTITLE “SBT:0” ACK
AUDIO “AUD:0” ACK
DISPLA Y (OSD) Toggle “DIP:0” ACK
Step “DIM:0”
DIMMER (FL/LCD)
OFF “DIM:1”
DIMMER “DIM:2”
ACK
ON “DIM:3”
RETURN “CUR:0”
UP “CUR:1”
CURSOR
DOWN “CUR:2”
ACK
LEFT “CUR:3”
RIGHT “CUR:4”
0 “NUM:0”
1 “NUM:1”
2 “NUM:2”
3 “NUM:3”
4 “NUM:4”
“RV1:?” B/E Soft Version “VR1:????????????”
“RV2:?” Panel Soft Version “VR2:????????????”
“RV3:?” AUDIO DSP Soft Version “VR3:????????????”
13
3-6. Status Feedback
A-B REPEAT
ASPECT
AutoPowerOff
REMOTE CODE
EcoMode
PLA Y MODE
feedback Layer
Layer2 @A-B:?\x0d,
Layer2 @ASP:?\x0d,
Layer2 @ATP:?\x0d,
Layer2 @RC6:?\x0d,
Layer2 @ECO:?\x0d,
Layer1 @MOD:?\x0d
Auto Status
Request Status Notes
@A-B:1\x0d OFF
@A-B:2\x0d SET A
@A-B:3\x0d SET A-B
@ASP:1\x0d LetterBox
@ASP:2\x0d Panscan
@ASP:3\x0d Wide
@ASP:4\x0d SQUEEZE
@ATP:1\x0d OFF
@ATP:2\x0d ON
@RC6:1\x0d DVD1
@RC6:2\x0d DVD2
@ECO:1\x0d OFF
@ECO:2\x0d ON
@MOD:6\x0d PLAY FAST FWD
@MOD:7\x0d PLAY F AST REV
@MOD:2\x0d PLAY
@MOD:3\x0d PLAY PAUSE
@MOD:4\x0d PLAY SLOW FWD
POWER
RANDOM
REPEA T
S.MODE
TRA Y
NTSC/PA L
VIDEO MUTE
@MOD:5\x0d PLAY SLOW REV
@MOD:1\x0d STOP
@MOD:0\x0d TOC (LOADING)
Layer1 @PWR:?\x0d,
Layer2 @RDM:?\x0d,
Layer2 @RPT:0\x0d,
Layer2 @SCD:?\x0d,
Layer1 @TRY:?\x0d,
Layer2 @TVS:?\x0d,
Layer2 @VMT:?\x0d,
@PWR:1\x0d OFF
@PWR:2\x0d ON
@RND:1\x0d OFF
@RND:2\x0d ON1
@RND:2\x0d ON2
@RPT:1\x0d OFF
@RPT:2\x0d Rep1
@RPT:3\x0d Rep2
@RPT :3\x0d
@SCD:1\x0d SACD
@SCD:2\x0d SACD
@SCD:3\x0d SACDCD
@TRY:1\x0d OPEN
@TRY:2\x0d CLOSE
@TVS:1\x0d NTSC
@TVS:2\x0d PAL
@TVS:3\x0d AUTO
@VMT:1\x0d OFF
@VMT:2\x0d ON
@DSC:-\x0d
@DSC:0\x0d NoDisc
@DSC:1\x0d CD
@DSC:2\x0d VCD
@DSC:3\x0d DVD
@DSC:4\x0d DVD Audio
@DSC:5\x0d SACD
@DSC:6\x0d MP3/JPEG
@TTL:???\x0d Title
@GRP:???\x0d Group
@CHP:???\x0d Chapter
@TRK:???\x0d Track
@TIH:?.??.??\x0d
@TIM:???.??\x0d
@PGR:1\x0d Progressive
@PGR:2\x0d Interlace
@DIM:1\x0d, OFF
@DIM:2\x0d, DIMMER
@DIM:3\x0d, ON
@VR0:????????????\x0d RS-232C Ver. No.
@VR1:????????????\x0d BE Ver . No.
@VR2:????????????\x0d
@VR3:????????????\x0d DSP Ver. No.
@AST :0\x0d
@AST:1\x0d layer1 ON
@AST:2\x0d layer2 ON
@AST:3\x0d layer3 ON
@AST:4\x0d layer1,layer2 ON
@AST:5\x0d layer1,layer3 ON
@AST:6\x0d layer2,layer3 ON
@AST:7\x0d all layer ON
AutoPowerOff @A TP:1\x0d, OFF @ATP:2\x0d ON
AUDIO
CLEAR @CLR:0\x0d
CONDITION @CND:0\x0d Toggle
RETURN @CUR:0\x0d RETURN
CURSOR @CUR:1\x0d UP @CUR:2\x0d DOWN @CUR:3\x0d LEFT
DIMMER (FL/LCD) @DIM:0\x0d Step @DIM:1\x0d OFF @DIM:2\x0d DIMMER
DISPLA Y (OSD)
REMOTE CODE @RC6:1\x0d DVD1
EcoMode @ECO:1\x0d OFF
ENTER
GO TO TRACK @GOT:1\x0d NEXT
I.REPLA Y SKIP @IGT :1\x0d I.S KIP
MARKER @MRK:0\x0d Toggle
MENU @MNU:0\x0d T oggle
TOP MENU @MNU:1\x0d T oggle
NUMBER @NUM:0\x0d 0
@NUM:2\x0d 2 @NUM:3\x0d 3 @NUM:4\x0d 4
@NUM:7\x0d 7 @NUM:8\x0d 8 @NUM:9\x0d 9
COMMAND Notes
@ASP:4\x0d SQUEEZE
@AUD:0\x0d Toggle
@CUR:4\x0d RIGHT
@DIM:3\x0d ON
@DIP:0\x0d Toggle
@RC6:2\x0d DVD2
@ECO:2\x0d ON
@ENT :0\x0d
@GOT :2\x0d PREV
@IGT :2\x0d I.REPL Y
@NUM:1\x0d 1
@NUM:5\x0d 5
@NUM:6\x0d 6
16
SETUP @OSD:0\x0d Step
PAGE
PLA Y MODE @PFF:0\x0d PLAY FAST FWD
COMMAND Notes
@NUM:P\x0d +10
@P AG:1\x0d +
@P AG:2\x0d -
@PPS:0\x0d PLAY PAUSE
@PSR:0\x0d PLAY SLOW R EV @STP:0\x0d STOP
PROGRAM @PRG:0\x0d Toggle
PROGRESSIVE/
INTERLACE
POWER @PWR:1\x0d OFF @PWR:2\x0d ON
RANDOM @RDM:0\x0d Step
REPEA T @RPT:0\x0d Step
S.MODE @SCD:0\x0d T oggle @SCD:1\x0d SACD Stereo
SEARCH @SCH:0\x0d Toggle
STEP @PST:0\x0d Toggle
SUBTITLE @SBT:0\x0d Toggle
TRA Y @TRY :0\x0d T oggle @TRY:1\x0d OPEN
NTSC/PA L/AUTO @TVS:0\x0d Toggle
VIDEO ADJ @VAJ:0\ x0d Toggle
VIDEO MUTE
@VMT :1\x0d OFF @VMT :2\x0d ON
ZOOM @ZOM:0\x0d Toggle
INFORMA TION @INF:0\x0d Toggle
HDMI ON/OFF @HDM:0\x0d Toggle @HDM:1\x0d OFF @HDM:2\x0d
HDMI RESET @HDR:0\x0d RESET
@PFR:0\x0d PLA Y F AST REV
@PL Y :0\x0d PLAY
@PSF:0\x0d PLAY SLOW FWD
@PGR:0\x0d Toggle
@SCD:2\x0d SACD Multi
@SCD:3\x0d SACDCD
@TRY:2\x0d CLOSE
@VMT :0\x0d Toggle
ON
17
Auto status feed back
@AST :7x 0d
COMMAND Notes
@AST :0\x0d all layer OFF
@AST:1\x0d layer1 ON
@AST :2\x0d
@AST:3\x0d layer3 ON
@AST:4\x0d layer1,layer2 ON
@AST:5\x0d layer1,layer3 ON
@AST:6\x0d layer2,layer3 ON
@AST :7\x0d all layer ON
layer2 ON
18
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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