This is the documentation for the latest (main) development branch of mcuxpresso sdk. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Hardware requirements

• Micro USB cable

• EVK-MIMXRT685 board

• Personal Computer

Board settings

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 the output of the clockout demo in the terminal window:

Clock Output Driver Example.
Please choose one output clock.
        A -- SFRO Clock.
        B -- External Clock.
        C -- Low Power Oscillator Clock.
        D -- FFRO Clock.
        E -- Main Clock.
        F -- DSP Main Clock.
        G -- Main System PLL.
        H -- SYSPLL0 AUX0 PLL.
        I -- DSP PLL.
        J -- SYSPLL0 AUX1 PLL.
        K -- AUDIO PLL.

To measure the output clock signal, please use the oscilloscope to probe J27_6(P1_10).