[SOLVED] Cortex M3 being identified as M4

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  • [SOLVED] Cortex M3 being identified as M4

    HW: Silicon Labs starter kit - STK3600 - EFM32LG990F256
    Integrated Segger J-Link USB debugger/emulator


    ****************************************************************************************************
    $ JLinkExe
    SEGGER J-Link Commander V6.32d (Compiled May 28 2018 16:59:04)
    DLL version V6.32d, compiled May 28 2018 16:58:57


    Connecting to J-Link via USB...O.K.
    Firmware: Energy Micro EFM32 compiled Mar 1 2013 14:08:50
    Hardware version: V7.00
    S/N: 440096237
    License(s): GDB, RDI
    VTref=3.286V



    Type "connect" to establish a target connection, '?' for help
    J-Link>connect
    Please specify device / core. <Default>: EFM32LG990F256
    Type '?' for selection dialog
    Device>EFM32LG990F256
    Please specify target interface:
    J) JTAG (Default)
    S) SWD
    TIF>S
    Specify target interface speed [kHz]. <Default>: 4000 kHz
    Speed>4000
    Device "EFM32LG990F256" selected.



    Connecting to target via SWD
    Found SW-DP with ID 0x2BA01477
    Scanning AP map to find all available APs
    AP[1]: Stopped AP scan as end of AP map has been reached
    AP[0]: AHB-AP (IDR: 0x24770011)
    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.


    **************************
    WARNING: Identified core does not match configuration. (Found: Cortex-M4, Configured: Cortex-M3)
    **************************


    FPUnit: 6 code (BP) slots and 2 literal slots
    CoreSight components:
    ROMTbl[0] @ E00FF000
    ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
    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: 003BB923 TPIU-Lite
    ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
    Cortex-M4 identified.

    ****************************************************************************************************

    The EFM32 is a Cortex M3 why is it being flagged as M4?
  • Hello,

    Thank you for your inquiry.
    The J-Link OBs from SiLabs are developed and thus supported by SiLabs.
    For further guidance we suggest getting in contact with SiLabs support.

    Best regards,
    Nino
    Please read the forum rules before posting: Forum Rules

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