Denon AVR 2808CI Serial Protocol - Page 2

Protocol specification The following three data forms are defined. COMMAND : The message sent to a system(AVR) from a controller(Touch Panel etc.) A command to a system is given from a controller. EVENT : The message sent to a controller (Touch Panel etc.) from a system (AVR) The result is sent, when a system is operated directly and a state changes. *The form of EVENT presupposes that it is the same as that of COMMAND. **Refer to the following table for the contents of COMMAND and EVENT. RESPONSE : The message sent to a controller (Touch Panel etc.) from a system (AVR) if the 'request command' (COMMAND+?+CR(0x0D)) has came from a controller. The RESPONSE should be sent within 200ms of receiving the COMMAND. *The form of RESPONSE presupposes that it is the same as that of EVENT. Basic specification: The command by ASCII CODE, parameter expression *ASCII CODE which can be used is from 0x20 to 0x7F: the alphabet and the number of 0-9, and space (0x20), some signs, AND carriage return (0x0D) --- It is used only as a pause sign. Command structure: COMMAND + PARAMETER + CR (0x0D) COMMAND: ASCII CODE of 2 characters Ex. SI : Select Input source MS : surround Mode Setting MV : Master Volume setting PW : system PoWer setting PARAMETER : ASCII CODE ( up to 25 characters) ex. DVD : function name SUPER STADIUM : surround mode name *Special Parameter--- ? : for request command - 2 -