TM8000 Mobile Radio Accessories Manual TMAA01-05 Options-Extender Board 39March 2004 © Tait Electronics Limited3.3 Interface SpecificationThe following tables summarize the signals used for the options-extenderboard on the internal options connector (SK1 on the options-extender board)and the external options connector (SK2 on the options-extender board).Note The TM8000 3DK Hardware Developer’s Kit ApplicationManual (product code MMAA30-01-00-807) contains a detailedelectrical specification for the signals available on the radio’s inter-nal options connector. This manual is part of the 3DK ResourceCD, which can be purchased using product code TMAA30-01.Table 3.3 Internal options connector - pins and signalsPin ConnectorSignal Description1 13V8_SW switched 13V8 supply from the radio2 AUD_TAP_OUT Programmable tap point out of the receive or transmit audio chain.DC-coupled3 AGND analogue ground4 AUX_MIC_AUD Auxiliary microphone input, with electret microphone biasingprovided.Dynamic microphones are not supported.5 RX_BEEP_IN receive sidetone input, AC-coupled6 AUD_TAP_IN Programmable tap point into the receive or transmit audio chain.DC-coupled7 RX_AUD not connected8 RSSI analogue RSSI output9-15 IOP_GPIO1 toIOP_GPIO7programmable function and direction16 DGND digital ground17 IOP_RXD an RS-232 compliant asynchronous serial port - receive data18 IOP_TXD an RS-232 compliant asynchronous serial port - transmit dataBDFHJ1!1#1%1&CEGI1)1@1$1^1*top view
