Lexicon MC-12 - User Manual

Lexicon
MC-12 Serial Communications Protocol Printed on: 07/13/05
Serial Communications Protocol Definition
Project: Lexicon MC-12/MC-12B/MC-12 Room EQ
Updated: July 13, 2005
Software Version 5.0
Protocol Version:
Major rev 1
Minor rev 6
© 2005 Harman Specialty Group All rights reserved. 1 of 106

Lexicon MC-12 Specifications

General

Audio Channels	7.1
7.1 Channel Output	Yes
Weight	25 lbs
Digital Outputs (Coaxial)	1
Digital Outputs (Optical)	1
Type	Preamp/Processor
Audio Decoding	Dolby Digital, DTS, Dolby Digital EX, DTS-ES
Video Inputs	Composite, S-Video, Component
Analog Audio Outputs	7.1-channel
Video Outputs	Composite, S-Video, Component
THX Certified	Yes
Surround Modes	Dolby Pro Logic IIx, DTS Neo:6
Category	AV Processor
Supported Audio Formats	Dolby Digital, DTS

Summary

Document References

1.1 Change List

Details updates and modifications made to the protocol over time.

Protocol Definitions

2.1 Protocol Version Cross-reference

Cross-references protocol versions for MC-12, SDP-40, MC-1, DC-2, and SDP-3 products.

Protocol Abbreviations

Serial Protocol Overview

Physical Layer Details

5.1 DB-9 RS232 Connector

Details the physical connection and pinout for the RS232 serial port.

5.2 Serial Port Driver

Specifies the serial port configuration settings like baud rate and data format.

5.3 Errors

Describes error detection mechanisms at the physical layer, such as parity errors.

5.4 MC-12 Receive Buffer

Explains the function and capacity of the MC-12's internal receive buffer.

5.5 MC-12 Hardware Verification

Outlines the procedure for verifying the RS232 port functionality.

Data Link Layer Details

6.1 Errors

Details error handling within the data link layer, including NAK responses.

Application Layer

7.1 MC-12 Asynchronous Notification Packets

Packets transmitted by MC-12 for system changes like power on, sleep, and display updates.

7.2 Acknowledgment Packets

Packets used for communication validation, including ACK and NAK responses.

7.3.1 Reset Unit (MC-12, MC-1)

Commands the MC-12 to perform a soft reset operation.

7.3.4 Get Unit Configuration (MC-12, MC-1)

Requests the MC-12's current unit configuration details.

7.3.5 Get System Status (MC-12, MC-1)

Requests the current system status of the MC-12.

7.3.18 Set System Volume (MC-12, MC-1)

Sets the system volume level on the MC-12.

7.3.21 Set Active Effect by Id (MC-12, MC-1)

Sets the active audio effect by its identifier.

7.3.27 Set Input Name by Id (MC-12, MC-1)

Assigns a custom name to a specific input ID.

7.3.30 Host Sleep (MC-12, MC-1)

Notifies the MC-12 that the Host is powered down or in standby.

7.3.35 Send Display String Command (MC-12, MC-1)

Sends a string to the MC-12 for display on the OSD and front panel.

7.3.40 MC-12 Send IR Command (MC-12)

Transmits IR command key codes to the MC-12.

7.3.47 MC-12 Set System Volume (MC-12)

Sets the system volume level on the MC-12.

7.3.50 MC-12 Set Active Effect by Id (MC-12)

Sets the active audio effect by its identifier.

Appendix A Command Codes

Appendix B Error Codes

Appendix C DC-2, MC-1 IR-Codes

Appendix D MC-12 IR Codes

Appendix E MC-1 Input Id’s

Appendix F MC-12 Input Ids

Appendix G Protocol Constants

Appendix H MC-12 to MC-1 Effect Map

Appendix I MC-1 to MC-12 Effect ID Map

Appendix J MC-12 Mode Ids

Application Notes and Examples

1.1 Box Initializations

Describes the MC-12's power-on initialization and communication sequence.

1.2 Getting System Wide Status and Setup

Details the process for obtaining overall system status and configuration.

1.3 Downloading the System Setup to the MC-12

Describes the procedure for transferring system setup data to the MC-12.

1.4 Simple System Control & System Status

Covers basic system control and status retrieval using commands.

Examples

1.5 Examples

Provides practical examples of command transmissions and responses.

1.5.1 MC-12 Get Unit Configuration

Provides an example of the MC-12 Get Unit Configuration command and response.

1.5.2 Send MC-1 IR Command Example

Illustrates sending an MC-1 IR command for 'Volume Up'.

1.5.3 Send MC-12 IR Command Example

Demonstrates sending an MC-12 IR command for 'MAIN_GAME'.

1.6 MC12 V5.00 Parameter ID List

Lists parameter IDs for V5.00, noting potential changes with software versions.