Hi I got an ST Link ISOL for programming an STM32L4R9 on custom board. I can connect it to ST Link V2 on SWD using 4 pins from another nucleo board, TGT_VDD, SWCLK, SWDIO and GND.

[Makarand]

In the target voltage I can see not detected.

I have removed the ribbon cable and have connected using jumpers now, pins in the following manner:

1 - VDD

7 - SWDIO

9 - SWCLK

3, 6 - GND

I don't know what is going wrong with the ISOL version of the STLINK v2.

Request some assistance on this.

Thanks in advance!

Makarand

[Simon.T]

Hello @Makarand​ !

What tool do you use to connect the STM32?

Try :

1 -> VDD

4 or 6 -> GND

7 -> SWDIO

9 -> SWCLK

To have more information on the ST-Link you can also check the UM1075

Regards,

Simon

[Makarand]

Hello,
I have tried this but still does not work. I use the ST LINK Utility to connect to target. I plan on using IAR workbench for debugging.
Thanks,
Makarand Deshmukh
Lead Engineer – Electronics and Embedded SW Development

[Simon.T]

Hello @Makarand​ ,

Please install stm32 cube programmer. For me it's better to try a connection between STM32 and ST-LINK.

Moreover, STM32 Cube programmer allow to program the option byte.

Link : STM32CubeProg - STM32CubeProgrammer software for all STM32 - STMicroelectronics

Regards,

Simon