Panasonic KX-HCM110A

andtheJPEGprocessingisperformedhere.Thecompressedencode
dataarestoredtotheSDRAM.(2)
-AheaderisaddedtotheencodedJPEGdatabyadirectionoftheCPU
anditistransferredtoanetworkafteraprotocolprocessing.(3)
13.4.SOUNDBLOCK
ExternalMicrophoneJack(CN603)
Usedwiththeexternalmicrophone.
SpeakerJack(CN604)
Usedwhenconnectingaspeakerwithabuilt-inamplifier,whenthesoundisoutputfromacamera.
MicrophoneDetection(Q603)
Whentheexternalmicrophoneplugisnotinserted,pins3and2oftheMicrophoneJack(CN603)are
short-circuitedandabasecurrentissuppliedtoQ603throughR603,R632andR629sothattheQ603
goesONandacollector(MIC_Ssignal)goesLOW.Alternatively,whenthemicrophoneplugisinserted,
pins3and2oftheCN603becomeopensothattheQ603goesOFFandtheMIC_SsignalgoesHIGH.
Fromthissignal,theCPUdetectsthemicrophonestatus.
TheCPUturnsthemicrophoneSWonandoffinthePCMCodec(IC601)fortheexternalorthebuilt-in
microphone,asappropriate.
ALCAmplifier(IC602:Forthebuilt-inmicrophone,IC603:Fortheexternalmicrophone)
PowerSupply:3.3V
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