Command Format And Answer Format - Denon DCM-390 Specification

Revision1.30
Date 25.Apr.'06
2

Command format and answer format

The DCM380X uses commands each of which consists of a data row (some commands no need PC) composed of
command codes (CC) and parameter codes (PC). The host shall be designed to send block check characters (BCC)
following ETX, with the data row enclosed in STX (text start: 0x02) and ETX (text termination: 0x03). The DCM380X
shall complete command receive with correct BCC codes.
Here are the formats.
Commands <STX> <CC> <PC0> <PC1> <PC2> <...........> <PCn> <ETX> <BCCH><BCCL>
STX (Start of TeXt)
CC (Command Code)
PC (Parameter Code)
ETX (End of Text)
BCC (Block Check Character)
BCCH is an ASCII code converted from X (higher 4 bits of sum) and BCCL is converted from Y (lower 4 bit of sum).
BCCH and BCCL are ASCII coded data.
Answers <STX> <CC> <AC> <PC0> <PC1> <PC2> <> <PCn> <ETX><BCCH><BCCL>
STX (Start of TeXt)
RC (Reply Code)
AC (Answer Code)
PC (Parameter Code)
ETX (End of TeXt)
BCC (Block Check Character)
BCCH is an ASCII code converted from X (higher 4 bits of sum) and BCCL is converted from Y (lower 4 bit of sum).
BCCH and BCCL are ASCII coded data.
D&M
0x02
Command code
Number of parameters is defined for each command.
0x03
CC + PC0 + PC1 + PC2 + + PCn + ETX = XY (hex)
Each of X and Y is 4 bit long, X, Y=0,1,2,3,4,5,6,7,8,9,A, B, C, D, E, F
0x02
Reply code (=Command code)
Answer code
Number of parameters is defined for each command.
0x03
CC + PC0 + PC1 + PC2 + + PCn + ETX = XY (hex)
Each of X and Y is 4 bit long, X, Y=0,1,2,3,4,5,6,7,8,9,A, B, C, D, E, F
DCM390 Serial Interface Specification
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