- 1 -DENON AVR control protocolVer. 5.3.0.for 2808CIApplication model : AVR-2808CIApplication terminal: RS-232CConnector specificationⅠ. RS-232CConnector 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 synchronizationCommunication system : A half duplexCommunication speed : 9600bpsCharacter length : 8 bitsParity control : NoneStart bit : 1 bitStop bit : 1 bitCommunication procedure : Non proceduralCommunication data length : 135 bytes (maximum)

Denon AVR 2808CI - AV Receiver Manual