178BHT-604BW8.1.4 Interface SpecificationsIrDA InterfaceSpecification: IrDA Ver1.3 Low Power physical layer compliant(Except transmission speed: 460,800 bps)Input signals: RDOutput signals: SDTransmission speed: 9,600 / 19,200 / 38,400 / 57,600 / 115,200 / 460,800 /4M bpsNote: 460,800 bps is only possible when communicating from one BHT-604BW unit to another orwith the CU-621. 4 Mbps is only possible for communication with the dedicated CU-611 unit.The maximum transmission speed in all other cases is 115,200 bps.Connector InterfaceSynchronization: Start-stopTransmission speed: Max. 115,200 bpsSignal level: Conforms to the RS-232C interfacePin assignment: As shown below.SD RD GNDPin No. Signal Name Function Signal Input/OutputBHT External device123SG (GND)SDRDSignal groundSend dataReceive data—Wireless InterfaceIEEE802.11bCommunication method: DS-SSFrequency band: 2400 – 2483.5 MHzTransmission speed: 11/5.5/2/1 MbpsChannels: 1 to 13 chIEEE802.11gCommunication method: OFDMFrequency band: 2400 – 2483.5 MHzTransmission speed: 54/48/36/24/18/12/9/6 MbpsChannels: 1 to 13 ch
