TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual CCDI 11© Tait Electronics Limited April 20071 CCDIThe Computer Controlled Data Interface (CCDI) protocol is a Taitproprietary command protocol embedded in the TM8100 and TM8200radios, and used for communicating with the radio via asynchronous serialports and over-air.The radio is the DCE and is connected directly to the DTE, usually a PC,via the serial port.Two modes of operation are available:■ Command mode■ Transparent modeWhen in Command mode, commands and response messages are passedbetween the PC and the radio using the CCDI protocol. CCDI commandscan also be used to obtain GPS data and NMEA messages from the radio.Refer to “QUERY” and “SEND_ADAPTABLE_SDM”. The baud rate isset to 1200, 2400, 4800, 9600, 14400, 19200, 28800 or 115200 (TM8200only) baud, using the programming application.When in Transparent mode, communication between the PC and the radiois set to 1200, 2400, 4800, 9600, 14400, 19200, 28800 or 115200 (TM8200only) baud, using the programming application.The over-air data rate is 1200 or 2400 bit/s for FFSK data,12 kbit/s for Tait High Speed Data (THSD) narrow band and wide band,and can be set to 19200 bit/s for THSD wide band.Figure 1.1 Modes of operationPC Serial PortPC runningterminal applicationPC runningterminal applicationPC Serial Port