DocID023502 Rev 2

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AN4146

Selectors, jumpers and connectors

2.2

Microphone audio adapter connections

Connecting the microphone audio adapter boards is very simple. The STEVAL-MKI126Vx

board hosts four groups of three female headers like those depicted in the figure below. The

J12, J25 and J26 group can host one of the three different types of microphone audio

adapters

Figure 12. Female headers on STEVAL-MKI126Vx board

Figure 13 shows the connection of the audio adapter board for the MP34DT01. It’s also

possible to cut one of the microphones and use a single small circular PCB, allowing the

evaluation of a different type of digital microphone at the same time.

Figure 13. Microphone audio adapter board plugged into STEVAL-MKI126

(STSmartVoice demonstration board)