AnsweredAssumed Answered

program flash on the FRDM-K22F board,

Question asked by Ed McMurray on Oct 5, 2017
Latest reply on Oct 10, 2017 by Robin_Shen

I am trying to program flash on the FRDM-K22F board, using a Segger Jlink and Segger JFlash. 

I have identified the target as MK22FN512xxx12. I've tried using both JTAG and SWD interface.  I varied speed from 100 to 4k.  I am able to connect to the processor.   When I try to erase device, I get the following errors.


Failed to download RAMCode

Failed to prepare for programming

Failed to erase sectors.


Am I missing something obvious?


Thanks for any help.



I have removed jumpers J10 and J13.



error log


Erasing MK22FN512XXX12 via JTAG-Interface@1000kHz
Erase Thread started.
Device "MK22FN512XXX12" selected.
TotalIRLen = 4, IRPrint = 0x01
JTAG chain detection found 1 devices:
 #0 Id: 0x4BA00477, IRLen: 04, CoreSight JTAG-DP
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x001C0000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB000 SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
Debugger initialized successfully.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Failed to read back RAMCode for verification.
Failed to prepare for programming.
Failed to download RAMCode!
Erase Thread exited
Erase failed.