MCUXpresso SDK Documentation
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How to set the board to the Bootloader ISP mode

How to set the board to the Bootloader ISP mode#

On the FRDM-KW43 board:

  1. Press and hold the BOOT CONFIG switch, SW2.

  2. Connect the FRDM-KW43 board via the micro-USB connector to the PC.

  3. Release the switch SW2.

  4. Check the associated USB port number on the PC (such as COM10).

  5. While the KW43 is in bootloader ISP mode, navigate to the folder where blhost.exe is located.

  6. Type the command .\blhost.exe -p COM10 -- get-property 1 to make sure that the KW43 is in Bootloader ISP mode, you should see:

    • Ping responded in 1 attempt(s)

    • Inject command ‘get-property’

    • Response status = 0 (0x0) Success.

    • Response word 1 = 1258488064 (0x4b030100)

    • Current Version = K3.1.0

On a custom board:

  1. Short the BOOT_CFG pin to VDD while reset.