Notes For All Schematics and Circuit Boards 2-7
VS AUDIO_SEL Switch signal to Enable option board audio output signal
VS GAIN_SEL Voice Storage Gain Select line
VS_MIC Voice Storage Audio Signal to microphone path
VS_INT Voice Storage Interrupt line
VS_RAC Voice storage Row Address Clock Signal
VSTBY 3.3 V supply for µP when the radio is switched off
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