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Connecting an ext digital microphone to the LPC54114 Xpresso board

Question asked by James Whitney on Jan 21, 2019
Latest reply on Jan 23, 2019 by James Whitney

Greetings I have the LPC Audio and voice Recognition kit which is an LPC54114 base-board with a MAO shield. I have looked at the schematic for the shield which shows three jumpers installed on P1. These jumpers connect 'VDD', 'CLK', and 'DAT' from the on-board digital mic to the MCU. Upon further examination it appears that these three jumpers could be removed and a different digital directly connected to Header P1, pins 1, 3, and 5. I tried this and it failed to work. I also noted that when the jumpers are removed, LED D2 *does not* illuminate which to me is an indicator that one of the signals - my guess being VDD feeds through and goes *beyond* just the microphone.

Can someone please provide some enlightenment ?

Thanks, and regards,

Jim

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