M0 Function Remark
0 Internal signal Disc signal, MIC signal
1（3.3V）
External signal Tuner, external input
1 unused
0 unused
3.5.7 Function introduction to CD4052
Cd4052 is a 2-group 4-channel data selector used to select external input audio signal, microphone signal
or tuner audio signal.
1. Pin function is shown as the following table:
Pin Name Function Data direction
1, 2, 4, 5 Y0-Y3 Y signal input I
11, 12, 14, 15 X0-X3 X signal input I
3, 13 Y Y signal output O
6 INH Two groups both have no outpu
t when forbidden end his high level
I
7 VEE (minus) 12V power supply
8 VSS Ground
16 VDD 5V power supply
9, 10 B, A Gating signal I
13 X X signal output O
2. Signal A, B gating conditions are shown as the following table:
A B OUTPUT
0 0 unused
0 1 MIC (microphone)
1 0 AUX (external audio input)
1 1 TUNER headphone
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