[SOLVED] J-Link Flasher -- erase flash

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  • [SOLVED] J-Link Flasher -- erase flash

    I am trying to erase the flash on my NXP MK64FN1MOXXX12 in J-Link Commander.
    Any ideas what I am doing wrong ?





    SEGGER J-Link Commander V6.44f (Compiled Apr 12 2019 17:17:37)
    DLL version V6.44f, compiled Apr 12 2019 17:17:02


    Connecting to J-Link via USB...O.K.
    Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
    Hardware version: V8.00
    S/N: 58006015
    License(s): RDI,FlashDL,FlashBP,JFlash
    VTref=0.000V



    Type "connect" to establish a target connection, '?' for help
    J-Link>connect
    Please specify device / core. <Default>: MK64FN1M0XXX12
    Type '?' for selection dialog
    Device>Device MK64FN1MOXXX12
    Please specify target interface:
    J) JTAG (Default)
    S) SWD
    F) FINE
    I) ICSP
    C) C2
    T) cJTAG
    TIF>J
    Device position in JTAG chain (IRPre,DRPre) <Default>: -1,-1 => Auto-detect
    JTAGConf>Auto-detect
    ERROR while parsing value for IRPre. Using default: -1.
    ERROR while parsing value for DRPre. Using default: -1.
    Specify target interface speed [kHz]. <Default>: 4000 kHz
    Speed>-1
    Device "MK64FN1M0XXX12 (ALLOW SECURITY)" selected.



    Connecting to target via JTAG


    ****** Error: JLINKARM_SetSpeed(-1kHz): Maximum JTAG speed exceeded. Did you spe
    cify speed in Hz instead of kHz ?
    Cannot connect to target.
    J-Link>Device MK64FN1MOXXX12
    J-Link>connect
    Device "MK64FN1M0XXX12 (ALLOW SECURITY)" selected.



    Connecting to target via JTAG


    ****** Error: JLINKARM_SetSpeed(-1kHz): Maximum JTAG speed exceeded. Did you spe
    cify speed in Hz instead of kHz ?
    Cannot connect to target.
    J-Link>connect
    Device "MK64FN1M0XXX12 (ALLOW SECURITY)" selected.



    Connecting to target via JTAG


    ****** Error: JLINKARM_SetSpeed(-1kHz): Maximum JTAG speed exceeded. Did you spe
    cify speed in Hz instead of kHz ?
    Cannot connect to target.
    J-Link>
  • Hello,

    Thank you for your inquiry.

    rseedle wrote:

    VTref=0.000V
    This indicates that the target device is not powered correctly or that the reference voltage is not fed back to the J-Link on Pin 1:
    segger.com/products/debug-prob…gy/interface-description/

    So check your wiring and see if it works when VTref shows the expected target voltage.

    Best regards,
    Nino
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