TB20C 000:439.982   SEGGER J-Link V9.42 Log File
TB20C 000:440.638   DLL Compiled: May  6 2026 12:25:27
TB20C 000:440.693   Logging started @ 2026-07-07 06:36
TB20C 000:440.716   Process: D:\Program Files\Keil_v5\Keil_v5\UV4\UV4.exe
TB20C 000:440.761 - 440.730ms 
TB20C 000:441.000 JLINK_SetWarnOutHandler(...)
TB20C 000:441.016 - 0.025ms 
TB20C 000:441.026 JLINK_OpenEx(...)
TB20C 000:451.752   Firmware: J-Link V9 compiled May  7 2021 16:26:12
TB20C 000:452.644   Firmware: J-Link V9 compiled May  7 2021 16:26:12
TB20C 000:452.896   Decompressing FW timestamp took 195 us
TB20C 000:458.849   Hardware: V9.20
TB20C 000:458.925   S/N: 4294967295
TB20C 000:458.945   OEM: SEGGER
TB20C 000:458.965   Feature(s): RDI, GDB, FlashDL, FlashBP, JFlash
TB20C 000:460.045   Bootloader: (FW returned invalid version)
TB20C 000:461.145   TELNET listener socket opened on port 19021
TB20C 000:461.933   WEBSRV WEBSRV_Init(): Starting webserver thread(s)
TB20C 000:462.631   WEBSRV Webserver running on local port 19080
TB20C 000:463.334   Looking for J-Link GUI Server exe at: D:\Program Files\Keil_v5\Keil_v5\ARM\Segger\JLinkGUIServer.exe
TB20C 000:463.766   Looking for J-Link GUI Server exe at: D:\Program Files\SEGGER\JLink_V942\JLinkGUIServer.exe
TB20C 000:464.020   Forking J-Link GUI Server: D:\Program Files\SEGGER\JLink_V942\JLinkGUIServer.exe
TB20C 000:481.338   J-Link GUI Server info: "J-Link GUI server V9.42 "
TB20C 000:489.137 - 48.058ms returns "O.K."
TB20C 000:489.253 JLINK_GetEmuCaps()
TB20C 000:489.285 - 0.020ms returns 0xB9FF7BBF
TB20C 000:489.316 JLINK_TIF_GetAvailable(...)
TB20C 000:489.616 - 0.299ms 
TB20C 000:489.703 JLINK_SetErrorOutHandler(...)
TB20C 000:489.730 - 0.026ms 
TB20C 000:489.867 JLINK_ExecCommand("ProjectFile = "D:\Desktop\ProgramManagement\3Csystem\CCU621_M\Project\JLinkSettings.ini"", ...). 
TB20C 000:537.488   Ref file found at: D:\Program Files\Keil_v5\Keil_v5\ARM\Segger\JLinkDevices.ref
TB20C 000:537.896   REF file references invalid XML file: D:\Program Files\SEGGER\JLink_V942\JLinkDevices.xml
TB20C 000:539.140   Flash bank @ 0x08000000: SFL: Parsing sectorization info from ELF file
TB20C 000:539.173     FlashDevice.SectorInfo[0]: .SectorSize = 0x00001000, .SectorStartAddr = 0x00000000
TB20C 000:539.186   FlashBank @0x08000000: Sectorization info from SFL ELF file ignored because sectorization override from DLL / XML file is active.
TB20C 000:576.480   Device "GD32H759IIT6" selected.
TB20C 000:578.685 - 88.818ms returns 0x00
TB20C 000:607.249 JLINK_ExecCommand("Device = GD32H759II", ...). 
TB20C 000:608.368   Flash bank @ 0x08000000: SFL: Parsing sectorization info from ELF file
TB20C 000:608.417     FlashDevice.SectorInfo[0]: .SectorSize = 0x00001000, .SectorStartAddr = 0x00000000
TB20C 000:608.438   FlashBank @0x08000000: Sectorization info from SFL ELF file ignored because sectorization override from DLL / XML file is active.
TB20C 000:640.420   Device "GD32H759IIT6" selected.
TB20C 000:643.107 - 35.854ms returns 0x00
TB20C 000:643.392   ERROR: Unknown command
TB20C 000:643.444 JLINK_GetHardwareVersion()
TB20C 000:643.461 - 0.016ms returns 92000
TB20C 000:643.478 JLINK_GetDLLVersion()
TB20C 000:643.491 - 0.013ms returns 94200
TB20C 000:643.507 JLINK_GetOEMString(...)
TB20C 000:643.525 JLINK_GetFirmwareString(...)
TB20C 000:643.539 - 0.013ms 
TB20C 000:701.176 JLINK_GetDLLVersion()
TB20C 000:701.264 - 0.089ms returns 94200
TB20C 000:701.283 JLINK_GetCompileDateTime()
TB20C 000:701.297 - 0.013ms 
TB20C 000:727.670 JLINK_GetFirmwareString(...)
TB20C 000:727.736 - 0.065ms 
TB20C 000:736.263 JLINK_GetHardwareVersion()
TB20C 000:736.332 - 0.068ms returns 92000
TB20C 000:762.835 JLINK_GetSN()
TB20C 000:762.911 - 0.075ms returns -1
TB20C 000:762.933 JLINK_GetOEMString(...)
TB20C 000:796.751 JLINK_TIF_Select(JLINKARM_TIF_SWD)
TB20C 000:797.700 - 0.964ms returns 0x00
TB20C 000:797.753 JLINK_HasError()
TB20C 000:797.789 JLINK_SetSpeed(5000)
TB20C 000:797.902 - 0.117ms 
TB20C 000:797.920 JLINK_GetId()
TB20C 000:829.384   ConfigTargetSettings() start
TB20C 000:829.489    J-Link Script File: Executing ConfigTargetSettings()
TB20C 000:862.189   ConfigTargetSettings() end - Took 284us
TB20C 000:888.291   InitTarget() start
TB20C 000:888.370    J-Link Script File: Executing InitTarget()
TB20C 000:905.668   SWD selected. Executing JTAG -> SWD switching sequence.
TB20C 001:047.654   Secured GD32 device detected.
For debugger connection the device needs to be unsecured.
Note: Unsecuring will erase the entire device and set the option bytes to default values.
TB20C 001:089.421   Executing default behavior previously saved in the registry.
TB20C 001:121.551   Device will be unsecured now.
TB20C 029:226.592   
  ***** Error: 
TB20C 029:226.656   Communication timed out: Requested 8 bytes, received 0 bytes !