User's Manual

MeiG hardware design guide
19
4.9.1 Receiver Interface Circuit
Figure 4.21: Receiver Interface Circuit
4.9.1 Microphone receiving Circuit
Below is the MEMS microphone interface circuit, which has more BIAS power supply than the
electret MIC.
Figure 4.22: Microphone Differential Interface Circuit
4.9.2 Headphone Interface Circuit
The module integrates a stereo headphone jack. Users are advised to reserve ESD devices during the
design phase to prevent ESD damage. The HS_DET pin of the module can be set as an interrupt. In
software, this pin is the earphone interrupt by default. The user can use this pin to detect the plugging
and unplugging of the earphone.