TM8000 Mobile Radio Accessories Manual TMAA02-06 Support Kit for Concealed & Dynamic Microphones 53March 2004 © Tait Electronics Limited5.3 Interface SpecificationThe following table and diagram summarizes the signals used for theconcealed and dynamic microphone support kit and shows the interfacebetween the support kit and the radio control head.Table 5.1 Concealed and dynamic microphone support board - pins and signalsPin Signal Colour1 CH_LE SPI latch signal to latch microphone select data intothe concealed and dynamic microphone board2 D2-D3 data from the control head shift register3 OE enables the output of the shift register of the audioswitch4 CH_SPI_CLK SPI clock signal to clock microphone select data intoconcealed and dynamic microphone board5 +13V8_SW power for analogue parts6 +3V3 power for digital parts7 RST initialise the concealed and dynamic microphoneboard shift register8 DGND digital ground1 MIC_AUD_IN-P1 microphone audio from microphone interface2 MIC_AUD_OUT processed microphone signal output to radio3 — not connected4 MIC_AUD_OUT processed microphone signal output to radio5 MIC+ audio from the concealed microphone6 AGND analogue groundBDFH CEGIS2 top viewBDF CEGS3 top viewFigure 5.1 Concealed and dynamic microphone support kit to radio interface
