Denon AVR-3805 Serial Protocol - Page 2

Protocol specification The following three data forms is defined. COMMAND : The message sent to a system(AVR/AVC) 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/AVC) 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/AVC) 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 CDR/TAPE-1 : function name THX SURROUND EX : surround mode name SUPER STADIUM : surround mode name *Special Parameter--- ? : for request command - 2 -