RK3288 Hardware Design Guide
Divider resistors R7010, R7016 of MIC should be chosen based on electret microphone
specification as shown in Fig 17-3.
Fig 17-3
If Codec chooses decoupling capacitor for output, in ideal condition, 100uF capacitor can
ensure flatness of frequency response test curve. If smaller decoupling capacitors are used for
the sake of lower cost, low-frequency response deviation may occur, as EC7000, EC7001
shown in Fig 15-4.
Fig 17-4
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