stlinkv3 and stlinkv2isol

[IVent.1]

I have this 2 programmers, stlinkv2isol and stlinkv3.

With the first, I'm able to program and debug my board. But with the second, no, I received a message like this

ST-LINK SN : 0050002E3331510633323639

ST-LINK FW : V3J13M4B5S1

Board : STLINK-V3SET

Voltage : 1.78V

Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

2nd connect tentative with frequency (8MHz)

ST-LINK SN : 0050002E3331510633323639

ST-LINK FW : V3J13M4B5S1

Board : STLINK-V3SET

Voltage : 1.77V

Error: ST-LINK error (DEV_CONNECT_ERR)

Encountered Error when opening C:\ST\STM32CubeIDE_1.16.0\STM32CubeIDE\plugins\com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.win32_2.1.400.202404281720\tools\bin\STM32_Programmer_CLI.exe

Error in STM32CubeProgrammer

Shutting down...

Exit.

I'm using the JTAG connector of stlinkv3 (CN2).

Thank you.

[Peter BENSCH · Accepted solution]

Your target voltage appears to be around 1.8V, which is OK for ST-LINK/V2-ISOL, but no longer for a pure STLINK-V3SET.

Without the B-STLINK-VOLT extension, STLINK-V3SET is intended for a target VCC of 3-3.6V, while ST-LINK/V2-ISOL operates between 1.65-3.6V.

Regards
/Peter