TSC2101-Audio Codec w/ Integrated Headphone Speaker Amp ...

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www.ti.comSLAS392C− JUNE 2003 − REVISED SEPTEMBER 2004MICBIAS_HND2.5MICIN_HNDLOUDSPEAKEROUT8POUT8N−1MICBIAS_HEDMIC_DETECT_IN3.3VTo Detection blockStereogssMICIN_HEDCellulargmsStereo +Cellularg m ssRECEIVEROUT32NSPK1−1m = mics = stereg = ground/midbiasSPK2SPKFCVGNDTo Detectionblock1.5 VFigure 22. Connection Diagram for Capless InterfaceCap InterfaceFigure 23 shows connection diagram to device for cap interface.30
www.ti.comSLAS392C− JUNE 2003 − REVISED SEPTEMBER 2004MICBIAS_HND2.5VMICIN_HNDLOUDSPEAKEROUT8POUT8N−1MICBIAS_HEDMIC_DETECT_IN2.5VTo Detection blockStereogssMICIN_HEDCellulargmsStereo +Cellularg m ssRECEIVEROUT32NSPK1−1m = mics = stereg = ground/midbiasSPK2SPKFCVGNDTo Detectionblock1.5 VFigure 23. Connection Diagram for Cap InterfaceAuto DetectionThe TSC2101 has built in monitors to automatically detect the insertion and removal of headsets. The detectionscheme can differentiate between stereo, cellular and stereo-cellular headsets. Upon detection of headsetinsertion or removal, the TSC2101 updates read-only bit D12 of control register 22H/Page 2. The TSC2101 canbe programmed to send an active high interrupt for insertion and removal of headsets to the host-processorover GPIO1 using bit D3 of control register 22H/Page 2 and GPIO2 using bit D4 of control register 22H/Page2. The headset detection feature can be enabled by setting bit D15 of control register 22H/Page 2. Whenheadset detection is enabled and headset is not detected, SPK1, VGND and MICBIAS_HED are turned offirrespective of control register settings. The TSC2101 also has the capability to detect button press on theheadset microphone. It consumes less than 50 µA while waiting for button press with everything else powereddown. Upon button press, the TSC2101 updates read-only bit D11 of control register 22H/Page 2. It can alsosend an active high interrupt for indicating button press to the processor over GPIO1 using bit D1D0 of controlregister 22H/Page 2. The TSC2101 provides debounce programmability for headset and button detect.Debounce programmability can be used to reject glitches generated, and hence avoids false detection, whileinserting headset or pressing button.Figure 24 shows terminal connections and jack configuration required for various headsets. Care should betaken to avoid any dc path from MIC_DETECT_IN to ground, when a headset is not inserted.31
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PACKAGE OPTION ADDENDUMwww.ti.com4-
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TSC2101-Audio Codec w/ Integrated Headphone Speaker Amp ...

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