Option bytes read fail and the core is locked up after reset MCU to factory settings

[wesleywong]

Hi ST team,

I am using STM32U5G9J-DK2 board and the verson of STM32CubeProgrammer is v2.21.0.

I tried to reset MCU to factory settings (in option byte tab) using STM32CubeProgrammer but failed.

After that, STM32CubeProgrammer could no longer connect to the board with below log.

14:23:14 : STM32CubeProgrammer API v2.21.0 | Windows-64Bits 
14:23:25:813 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr
14:23:25:814 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is unloaded
14:23:25:814 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr
14:23:25:814 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is loaded
14:23:28:572 : UR connection mode is defined with the HWrst reset mode
14:23:28:590 : ST-LINK SN  : 003200363233511439363634
14:23:28:590 : ST-LINK FW  : V3J16M8
14:23:28:590 : Board       : STM32U5G9J-DK2
14:23:28:591 : Voltage     : 3.28V
14:23:28:595 : SWD freq    : 8000 KHz
14:23:28:595 : Connect mode: Hot Plug
14:23:28:595 : Reset mode  : Hardware reset
14:23:28:598 : Device ID   : 0x476
14:23:28:617 : Revision ID : Rev Z
14:23:28:637 : Reading data...
14:23:28:638 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000080
14:23:28:738 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:28:738 : Reading data...
14:23:28:739 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:28:840 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:28:840 : Reading data...
14:23:28:841 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:28:941 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:28:942 : Reading data...
14:23:28:942 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:043 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:043 : Reading data...
14:23:29:044 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:144 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:145 : Reading data...
14:23:29:145 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:246 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:247 : Reading data...
14:23:29:247 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:348 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:349 : Reading data...
14:23:29:349 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:450 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:450 : Reading data...
14:23:29:450 : r ap 0 @0x40022040 0x00000004 bytes Data 0x00000018
14:23:29:551 : r ap 0 @0x40022040 0x00000004 bytes Data 0x00000018
14:23:29:552 : Database: Config 1 is active.
14:23:29:552 : flash loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/FlashLoader/0x476.stldr is loaded
14:23:29:552 : r ap 0 @0x40022040 0x00000004 bytes Data 0x00000018
14:23:29:552 : fail @0xFEEEFEEE
14:23:29:553 : Debug in Low Power mode enabled.
14:23:29:553 : r ap 0 @0xE0044004 0x00000004 bytes Data 0x00000000
14:23:29:553 : w ap 0 @0xE0044004 0x00000004 bytes Data 0x00000006
14:23:29:553 : r ap 0 @0xE0044008 0x00000004 bytes Data 0x00000000
14:23:29:553 : w ap 0 @0xE0044008 0x00000004 bytes Data 0x00001800
14:23:29:554 : Reading data...
14:23:29:554 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000080
14:23:29:656 : r ap 0 @0x0BFA07A0 0x00000004 bytes Data 0x00000018
14:23:29:656 : failed to read the requested memory content
14:23:29:657 : r ap 0 @0x40022040 0x00000004 bytes Data 0x00000018
14:23:29:657 : fail @0xFEEEFEEE
14:23:29:657 : r ap 0 @0x0BF99EFE 0x00000001 bytes Data 0x00000000
14:23:29:657 : fail @0xFEEEFEEE
14:23:29:912 : r ap 0 @0x40022040 0x00000004 bytes Data 0x00000018
14:23:29:912 : fail @0xFEEEFEEE
14:23:29:912 : r ap 0 @0x0BF99EFE 0x00000001 bytes Data 0x00000000
14:23:29:912 : fail @0xFEEEFEEE
14:23:29:912 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr
14:23:29:912 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is unloaded
14:23:29:912 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr
14:23:29:912 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is loaded
14:23:29:919 : UPLOADING OPTION BYTES DATA ...
14:23:29:919 :   Bank          : 0x00
14:23:29:919 :   Address       : 0x40022040 
14:23:29:919 :   Size          : 48 Bytes
14:23:29:920 : Reading data...
14:23:29:920 : r ap 0 @0x40022040 0x00000030 bytes Data 0x00000018
14:23:29:920 : r ap 0 @0x40022040 0x00000030 bytes Data 0x00000011
14:23:29:921 : Error: Uploading Option Bytes bank: 0 failed
14:23:29:960 : Error: Initializing the Option Bytes failed
14:23:29:988 : r ap 0 @0x40022040 0x00000004 bytes Data 0x00000011
14:23:29:989 : fail @0xFEEEFEEE
14:23:29:989 : r ap 0 @0x0BF99EFE 0x00000001 bytes Data 0x00000000
14:23:29:990 : fail @0xFEEEFEEE
14:23:29:991 : Disconnected
14:23:29:992 : Disconnected from device.
14:23:29:992 : Selected loader: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr
14:23:29:993 : External loader C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin/ExternalLoader/MX66UW1G45G_STM32H7S78-DK.stldr is loaded

I tried to read the core status using STM32_Programmer_CLI.exe and the result is "Core is locked up".

I also tried below commands but none of that could help recovering the board.

STM32_Programmer_CLI.exe --connect port=swd mode=HOTPLUG -rdu
Error: Disabling memory Read Protection failed

STM32_Programmer_CLI.exe --connect port=swd mode=HOTPLUG -ob displ
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Error: Uploading Option Bytes bank: 0 failed
Error: Initializing the Option Bytes failed

STM32_Programmer_CLI.exe --connect port=swd mode=HOTPLUG -ob unlockchip
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Error: Uploading Option Bytes bank: 0 failed
Error: Initializing the Option Bytes failed

STM32_Programmer_CLI.exe --connect port=swd mode=HOTPLUG -e all
Error: Fail to read Flash Size
Error: Mass Erase : Config SAU Failed !
Error: failed to erase memory
Error: Mass erase operation failed.Please verify flash protection

Does ST team have any idea how to recover the board or the board is bricked forever?