Hello All,

I have 2 Jlink OB STM32F103 devices.

I have an issue with reading DBGMCU register of STM32H743VI. Found solution here forum.segger.com/index.php/Thr…ro-when-using-ETF-Trace/?

According to that page issue solved with update 6.70h . I have checked release notes and found that issue solved with update 6.72.

Unfortunately, This update does not contain Jlink OB STM32F103 devices.

Is there any suggestions?

Thank you,
Savas

Hello Alex,

It is a seperate small board, I bought it on the internet second hand and unfortunately there is no serial number on it. It is only written J-linkOB. As I see there is a STM32F103 microcontroller on it.

When I connect it to JLink here is the log that you can see SN.

Log:
SEGGER J-Link Commander V7.54b (Compiled Sep 14 2021 16:13:05)
DLL version V7.54b, compiled Sep 14 2021 16:11:46

Connecting to J-Link via USB...O.K.
Firmware: J-Link ARM-OB STM32 compiled Aug 22 2012 19:52:04
Hardware version: V7.00
S/N: 20090928
License(s): RDI,FlashDL,FlashBP,JFlash,GDB
VTref=3.300V

Thank you

Hello Alex,

Is there any update for this issue?

Thank you