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Receiver / Speaker phone Circuits
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Figure 23. Receiver and Speaker phone mode system switch
A single analog switch is employed to support both voice and speaker shone mode with RCV_P.
In the speaker phone mode the SPK_EN port sets 'H' , then the RCV_P will be connected with
MIDI sound path(NO) and operate as loud speaker. The other case, the SPK_EN port will remain
'L' state and RCV_P will be connected with receiver path EAR_P(NC).
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3. H/W CIRCUIT DESCRIPTION
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