J-Link Flasher -- erase flash

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    • 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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