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

[Makarand]

Hi Simon,
However, I want to use the same for debugging using IAR.
Please suggest a solution with that in consideration.
Thanks,
Makarand Deshmukh
Lead Engineer – Electronics and Embedded SW Development

[Simon.T]

STM32 Cube Programmer not used to debug the product as IAR (Break point etc) but to have an access to the flash memory and cpu with more advanced function, and give some useful information about the ST-link and the MCU target.

Anyway, we will try without it. Did you already program the MCU? If yes did you use low power mode ?

Regards,

Simon

[Makarand]

I have not been able to program the MCU. It works fine with ST LINK non isolated with any utility.
It just does not work with ST LINK ISOL.
Thanks,
Makarand Deshmukh
Lead Engineer - Electronics and Embedded SW Development