MCUXpresso SDK Documentation
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Hardware requirements

Hardware requirements#

  • Micro USB cable

  • MIMXRT685-AUD-EVK board

  • Personal Computer

Board settings#

No special settings are required.

Prepare the Demo#

  1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the board

  2. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Download the program to the target board.

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

Running the demo#

The log below shows example output of the frequency measure demo in the terminal window:

Capture source: External clock (clk_in) (main system clock reference), reference frequency = 250105263 Hz
Computed frequency value = 23999301 Hz
Expected frequency value = 24000000 Hz

Capture source: RTC32K oscillator (main clock reference), reference frequency = 250105263 Hz
Computed frequency value = 5001265 Hz
Expected frequency value = 5002105 Hz

Capture source: FRO oscillator (main clock reference), reference frequency = 48000000 Hz
Computed frequency value = 52240185 Hz
Expected frequency value = 48000000 Hz
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