SLAU903 October 2023
For the on-board microphone input configuration shown in Figure 3-8, the TAx5x1x-Q1 records the audio captured from MK1 (ECM) or U5 (Analog MEMS) microphones. For U5, the audio port is located at the bottom of the board. Electret Microphone (MK1) is connected to IN1P/M and MICBIAS is used to power the on-board microphone, so header J8 must be installed. The MEMS microphone (U5) can be configured as a single-ended or differential input and connected to IN2P/M. There must not be any connections to J2 or J3 while the on-board microphone is used to preserve the performance of the microphone. There is a possibility that gain adjustment is needed in the device depending on the microphone sensitivity.