VMID is the microphone reference voltage, which must be connected to the MICN when the microphone is configured for single-ended input.
As shown, the suggested components are C1=220pF, C2=1uF, R1=680ohm~2.2kohm, R2=0ohm.
If it is differential input, the connection is the same as the connection on the NUC505 Tiny Board, as shown below.
What is the function of the VMID pin in NUC505? How to design the circuit diagram?
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