- 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