AnsweredAssumed Answered

New FRDM-K22F are bad

Question asked by Jei Chou on Sep 21, 2017
Latest reply on Sep 25, 2017 by Alice_Yang

Prior to a couple of weeks ago, we have quite a few FRDM-K22F.   We recently got 4 FRDM-K22F.  It came in NXP boxes.   When plugs in, it shows up only as "BOOTLOADER" drive, not an "MBED" drive.  These files are on the drive and dated 12/14/2012:

.fseventsd (this is a folder)





I have enough experience that I was able to load MBED firmware (0221_k20dx128_k22f_0x8000.bin) onto the tiny OpenSDA K20 via J10 (its JTAG).   MBED is now showing up when plugs in.  But MCUXpresso has problem to download my application to start debugging session:


GNU gdb (GNU Tools for ARM Embedded Processors)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-w64-mingw32 --target=arm-none-eabi".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
Find the GDB manual and other documentation resources online at:
For help, type "help".
Type "apropos word" to search for commands related to "word".


with warning box saying:

02: Failed on connect
Wire ACK Fault in DAP access

Probe(0): Connected&Reset. Was: NotConnected. DpID: 00000000. CpuID: 00000000. Info: <None>


Are these really old boards??  Is there a way to get this problem fixed??   Otherwise, we need to return these boards and get replacement.


Note: on the two microUSB connectors, there is stamp of "6H1".