Regarding isolation of SR5E1E5 microcontroller for JTAG connection

[Sreenidhi]

For JTAG I am using stellar link debugger, and I have to connect this debugger with microcontroller which is powered with other power supply, how to isolate or connect these connections, any digital isolator is suggested for this ?

[RobK1]

USB to USB isolators are commercially available, that would seem to be the obvious solution.

I don't know what's special about the Stellar Link, but ST also has an isolated version of the ST-Link debugger:

ST-LINK/V2-ISOL STMicroelectronics | Development Boards, Kits, Programmers | DigiKey