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Lexicon, Inc.
DC-2/MC-1 Serial Communications Protocol Printed on: 10/19/00
4 of 44
1 Documents
The following documents should also be used with this document to understand how this protocol can be
used with a DC-2/MC-1.
070-13227 MANUAL,OWNER'S,DC2
070-13278 MANUAL,OWNER'S,MC1
2 Definitions
System Parameter: A user changeable variable that stores a specific value that describes an operating
condition for the DC-2/MC-1 system.
Effect: An effect describes a particular type of processing on the audio data stream.
Effect Parameter: A changeable variable that stores a specific state or condition that controls the way the
effect functions or processes the audio.
HOST: The device initiating or receiving the serial communication packets to/from the DC-
2/MC-1.
DC-2/MC-1: The Lexicon product receiving or transmitting the serial communication packets
to/from the HOST.
Nonvolatile RAM: The area of memory in a DC-2/MC-1 that stores users adjustable parameters. The
Nonvolatile RAM is battery backed, to maintain values during DC-2/MC-1 power
down.
3 Abbreviations
SOP Start of Packet
EOP End of Packet
ACK Acknowledge
NAK No Acknowledge
FPD Front Panel Display
4 General Description
The intention of the DC-2/MC-1 serial port and protocol communication is for an external connected HOST
to control and obtain status from the DC-2/MC-1. The protocol has been designed to focus on two specific
goals. The first, is HOST uploading and downloading of DC-2/MC-1 configuration, and system/effect
setups. The second, is HOST control of basic user adjustable parameters.(i.e. input, volume, balance…)
CD VOL
Lexicon MC-1
HOST
Rs-232 Serial Link