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DENON AVR/AVC control protocol 
Ver. 3.11 
Application model : AVR-4802(AVC-A11SR) 
Application terminal : RS-232C 
 
Connector specification 
 
Connector type  :  DB-9pin female type, slave straight connection (DCE type)  
( 1pin : GND , 2pin : TxD , 3pin : RxD , 5pin : Common(GND) , 4,6,7,8,9pin : NC )  
Communication format  :  
Synchronous system    : Tone step synchronization  
communication system    : A half duplex 
Communication speed     : 9600bps  
Character length       : 8 bits  
Parity control       : None  
Start bit         : 1 bit  
Stop bit         : 1 bit  
Communication procedure     : Non procedural  
Communication data length   : 135 bytes (maximum)