RESET signal and SWD interface on nrf5340

Hi,

We are using a Segger JLINK to program a nrf5340 product using the SWD interface.  We have been successfully programming units using a design where there is a 100k pullup resistor connected to the micro nRESET input and the nRESET pin on the Segger JLINK.

We recently had a hardware design change which removed the 100k pullup and inserted a push-pull buffer between the Segger JLINK  nRESET and the nrf5340 nRESET.  Is this allowed?  Does the micro ever pull nRESET low?

Parents
  • Hi,

     

    We recently had a hardware design change which removed the 100k pullup and inserted a push-pull buffer between the Segger JLINK  nRESET and the nrf5340 nRESET.  Is this allowed? 

    Yes, setting the level directly should not impose any problems.

    Does the micro ever pull nRESET low?

    Not while the device is powered.

     

    Q1: How many of your devices has issues with initial programming? Is it only some devices or all devices?

    Q2: Could you add "--log" to the nrfjprog call and share the log file here?

     

    Kind regards,

    Håkon

  • Hi Hakon,

    So far, this problem has only occurred on 1 out of 2 boards tested.  The problem did not occur on initial programming.  We were able to successfully program two boards initially.  On one of the boards, we had programmed an application erroneously which was enabling the POFCON with thresholds set at 2.1v and 2.7v for VDDH.  The supplies VDD and VDDH are connected together and were running at 2.4v.

    We realized the POFCON event was being set, preventing further FLASH programming of the board through the SWD interface.  We were able to reprogram this board with firmware not enabling the POF, by connecting VDD and VDDH to 3.2V.  After a power cycle, it appears the SWD interface is locked.

    Attached is the nrfjprog log.

    ..

    [2024-May-21 15:57:28] [debug] --------------------------------------------------------------------------------
    [2024-May-21 15:57:28] [debug] nrfjprog -f NRF53 --recover --log 
    [2024-May-21 15:57:28] [debug] nrfjprog version 10.18.1 external
    [2024-May-21 15:57:28] [debug] --------------------------------------------------------------------------------
    [2024-May-21 15:57:28] [ info] Load library at C:\Program Files\Nordic Semiconductor\nrf-command-line-tools\bin\nrfjprog.dll.
    [2024-May-21 15:57:28] [ info] Library loaded, loading member functions.
    [2024-May-21 15:57:28] [ info] Member functions succesfully loaded.
    [2024-May-21 15:57:29] [debug] [ Client] - open
    [2024-May-21 15:57:29] [debug] [ Client] - start
    [2024-May-21 15:57:29] [ info] [ Client] - stdout: Jlinkarm nRF Worker ready. Handling sequence cc029885-97e7-402d-9c1d-b745bdfba58f.
    
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Logger sink registered in Segger backend logger
    [2024-May-21 15:57:29] [debug] [  JLink] - Logger sink registered in JLink logger
    [2024-May-21 15:57:29] [debug] [  nRF53] - open
    [2024-May-21 15:57:29] [debug] [  nRF53] - just_check_family
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - open_dll
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - No J-Link DLL path was provided. Attempting to auto detect.
    [2024-May-21 15:57:29] [ info] [SeggerBackend] - Load library at C:\Program Files (x86)\SEGGER\JLink_V766a\JLink_x64.dll.
    [2024-May-21 15:57:29] [ info] [SeggerBackend] - Library loaded, loading member functions.
    [2024-May-21 15:57:29] [ info] [SeggerBackend] - Member functions succesfully loaded.
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Set batch mode
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - dll_version
    [2024-May-21 15:57:29] [ info] [SeggerBackend] - Segger dll version 7.66.a loaded.
    [2024-May-21 15:57:29] [trace] [ Worker] - Command open executed for 43 milliseconds with result 0
    [2024-May-21 15:57:29] [trace] [ Client] - Command open executed for 137 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [ Client] - config
    [2024-May-21 15:57:29] [trace] [ Client] - Command config executed for 13 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [ Client] - enum_emu_snr
    [2024-May-21 15:57:29] [debug] [  nRF53] - config
    [2024-May-21 15:57:29] [trace] [ Worker] - Command config executed for 6 milliseconds with result 0
    [2024-May-21 15:57:29] [trace] [ Client] - Command enum_emu_con_info executed for 14 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [ Client] - connect_to_emu_with_snr
    [2024-May-21 15:57:29] [debug] [  nRF53] - enum_emu_con_info
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - enum_emu_con_info
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [trace] [ Worker] - Command enum_emu_con_info executed for 5 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [  nRF53] - connect_to_emu_with_snr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - connect_to_emu_with_snr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_enum_emu_snr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_get_num_emus
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_connect_to_emu_with_snr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_connect_to_emu_without_snr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Segger logging enabled.
    [2024-May-21 15:57:29] [trace] [  JLink] - Firmware: J-Link V10 compiled Jan 30 2023 11:28:07
    [2024-May-21 15:57:29] [trace] [  JLink] - Firmware: J-Link V10 compiled Jan 30 2023 11:28:07
    [2024-May-21 15:57:29] [trace] [  JLink] - Decompressing FW timestamp took 274 us
    [2024-May-21 15:57:29] [trace] [  JLink] - Hardware: V10.10
    [2024-May-21 15:57:29] [trace] [  JLink] - S/N: 50112183
    [2024-May-21 15:57:29] [trace] [  JLink] - OEM: SEGGER
    [2024-May-21 15:57:29] [trace] [  JLink] - Feature(s): GDB
    [2024-May-21 15:57:29] [trace] [  JLink] - TELNET listener socket opened on port 19021
    [2024-May-21 15:57:29] [trace] [  JLink] - WEBSRV WEBSRV_Init(): Starting webserver thread(s)
    [2024-May-21 15:57:29] [trace] [  JLink] - WEBSRV Webserver running on local port 19080
    [2024-May-21 15:57:29] [trace] [  JLink] - - 116.616ms returns "O.K."  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [ Client] - Command connect_to_emu_with_snr executed for 283 milliseconds with result 0
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_Lock()  
    [2024-May-21 15:57:29] [debug] [ Client] - read_connected_emu_snr
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_ExecCommand("SetRestartOnClose = 0", ...).   
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.005ms returns 0x01  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_ExecCommand("DisableFlashDL", ...).   
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.004ms returns 0x00  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_ExecCommand("ExcludeFlashCacheRange 0x0-0xFFFFFFFF", ...).   
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.009ms returns 0x00  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_SetHookUnsecureDialog  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_SetHookUnsecureDialog(...)
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.024ms returns 0  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_TIF_Select(JLINKARM_TIF_SWD)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 25.613ms returns 0x00  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_GetSpeedInfo()  
    [2024-May-21 15:57:29] [trace] [  JLink] - 180000000 Hz / n, n >= 12
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.021ms  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Connected emulator supports SWD speeds up to 15000kHz
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_SetSpeed(2000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.227ms  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_GetSpeed()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.009ms returns 2000  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - SWD clock set to 2000kHz
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_GetSN()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.008ms returns 50112183  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.012ms  
    [2024-May-21 15:57:29] [trace] [ Worker] - Command connect_to_emu_with_snr executed for 278 milliseconds with result 0
    [2024-May-21 15:57:29] [trace] [ Client] - Command read_connected_emu_snr executed for 0 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [ Client] - recover
    [2024-May-21 15:57:29] [debug] [  nRF53] - read_connected_emu_snr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_IsOpen()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.017ms returns 0x01  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_Lock()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - read_connected_emu_snr
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.017ms  
    [2024-May-21 15:57:29] [trace] [ Worker] - Command read_connected_emu_snr executed for 0 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [  nRF53] - recover
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_IsOpen()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.009ms returns 0x01  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_Lock()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [debug] [  nRF53] - Just_recover
    [2024-May-21 15:57:29] [debug] [  nRF53] - Just_is_eraseprotect_enabled
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - read_access_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_read_access_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - coresight_configure
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_GetHWStatus(...)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.499ms returns 0  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_Configure()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 100.532ms returns 0  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - read_debug_port_idr
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - read_debug_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_read_debug_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_select_debug_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Select AP 255, DP Bank 0, AP Bank 255
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.713ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.583ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.626ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.657ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.679ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.674ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.660ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.666ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.604ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.648ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [ Client] - Command recover executed for 123 milliseconds with result -21
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.608ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.539ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.581ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.586ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.597ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.582ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.585ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.589ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.627ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.489ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.519ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.593ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.588ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.585ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.586ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.587ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.635ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.560ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.569ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.593ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [error] [  nRF53] - Failed while checking eraseprotect status.
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.027ms  
    [2024-May-21 15:57:29] [trace] [ Worker] - Command recover executed for 120 milliseconds with result -21
    [2024-May-21 15:57:29] [debug] [  nRF53] - close
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_emu
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_IsOpen()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.020ms returns 0x01  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_Lock()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - close
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - disconnect_from_emu
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_disconnect_from_emu
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - is_connected_to_device
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_IsConnected()  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.009ms returns FALSE  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_is_debug_region_powered
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_read_debug_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_select_debug_port_register
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Select AP 255, DP Bank 0, AP Bank 255
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.584ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.603ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.559ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.577ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.587ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.589ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.585ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.617ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.525ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.593ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.604ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.560ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.595ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.587ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.587ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.594ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.568ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.589ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.590ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.587ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.601ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.539ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.580ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.610ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x02, 0x00000000)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.549ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - ---just_abort_debug_action
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Attempting to clear any configuration errors in debug port before closing connection. 
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.606ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.580ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.587ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.588ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_CORESIGHT_WriteAPDPReg(DP reg 0x00, 0x0000001F)  
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.583ms returns -1  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_HasError()  
    [2024-May-21 15:57:29] [error] [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
    [2024-May-21 15:57:29] [trace] [  JLink] - - 0.026ms  
    [2024-May-21 15:57:29] [trace] [  JLink] - JLINK_Close()  
    [2024-May-21 15:57:29] [debug] [SeggerBackend] - Segger Backend closed.
    [2024-May-21 15:57:29] [debug] [  nRF53] - nRF family DLL closed
    [2024-May-21 15:57:29] [trace] [ Client] - Command close executed for 141 milliseconds with result 0
    [2024-May-21 15:57:29] [debug] [ Client] - terminate
    [2024-May-21 15:57:29] [trace] [ Worker] - Command close executed for 139 milliseconds with result 0
    [2024-May-21 15:57:29] [trace] [ Client] - Command terminate executed for 0 milliseconds with result 0
    [2024-May-21 15:57:30] [trace] [ Worker] - Command terminate executed for 0 milliseconds with result 0
    [2024-May-21 15:57:30] [trace] [ Worker] - Executed 8 commands for 591 milliseconds
    [2024-May-21 15:57:30] [debug] [ Client] - Worker process exited with code: 0
    [2024-May-21 15:57:30] [debug] [ Client] - Worker process exited with code: 0
    [2024-May-21 15:57:30] [debug] [ Client] - Child process terminated with result 0
    [2024-May-21 15:57:30] [trace] [ Client] - Executed 8 commands for 711 milliseconds
    [2024-May-21 15:57:30] [debug] [ Client] - terminate
    

  • Hi,

     

    kpreiss said:
    So far, this problem has only occurred on 1 out of 2 boards tested.

    Does the other one work as intended, with the exact same firmware?

    Could this be a soldering issue? 

     

    Your .log file shows that the debugger is effectively not able to connect or detect any device. It is a similar output you'll get if you just disconnected the programming cable.

     

    PS: This is probably not related to the issues you're seeing now, but I noticed that your nrfjprog/JLink versions are quite old. You can download the latest here:

    https://www.nordicsemi.com/Products/Development-tools/nRF-Command-Line-Tools/Download

     

    Kind regards,

    Håkon

  • Hi Hakon,

    The problem is that the internal LDO regulator on the micro is damaged.  The DECRF/DECR voltage measures 0.4v and the DECD supply measures 1.4v.  On a good board, all supplies measure 1.1V.

    For now, we're going to assume the internal regulators were damaged when the board was being handled.  We have programmed 5 other boards so far without issues.

    Thanks for your help!

Reply
  • Hi Hakon,

    The problem is that the internal LDO regulator on the micro is damaged.  The DECRF/DECR voltage measures 0.4v and the DECD supply measures 1.4v.  On a good board, all supplies measure 1.1V.

    For now, we're going to assume the internal regulators were damaged when the board was being handled.  We have programmed 5 other boards so far without issues.

    Thanks for your help!

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