Hardware requirements

• Micro USB cable

• EVK-MIMX8M Plus board

• J-Link Debug Probe

• 12V power supply

• Personal Computer

• Microphone

Board settings

Connect microphone module to EVK board: 3V->J21-1 GND->J21-6 CLK->J21-40 DATA->J21-38

Please note this application can’t support running with Linux BSP!

Prepare the Demo

1. Connect 12V power supply and J-Link Debug Probe to the board, switch SW3 to power on the board

2. Connect a USB cable between the host PC and the J23 USB port on the target board.

3. Open a serial terminal with the following settings:

   • 115200 baud rate

   • 8 data bits

   • No parity

   • One stop bit

   • No flow control

4. Download the program to the target board.

5. Launch the debugger in your IDE to begin running the demo.

Running the demo

When the demo runs successfully, the log would be seen on the debugger terminal like:

PDM interrupt example started!
PDM recieve data:
XXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXX
PDM interrupt example finished!