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ST link V3 and reset pin

Pilous Droip
Senior

Hello.

I use ST Link V3 to program STM32H753 in SWD mode.

I used a programmer in OpenOCD mode.

Everything works well. But I control FPGA using ARM.

And ARM shares NRST pin with FPGA.

So when I program FPM from ARM, I have a problem. When programming FPGA from ARM, I can't connect to ARM and program. Any idea what's going on?

For example. I have a J-LINK programmer and it works well. The problem is only with ST-LINK v3.

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