I am having trouble connecting to the STM32N6 with SWD.
I have implemented a design using the STM32N645X0H3Q (though I have placed the STM32N647X0H3Q) using external VDDCORE. R110 is not mounted (to set VLXSMPS to NC).
On startup I have VDDIO (3.3V) and VDDA1V8ON (1.8V) to the MCU, and the MCU activated PWR_ON (I have VDDA1V8ON to the PDR_ON pin, A1 on another page). This activates the reset of the power, including VDDCORE. All voltage measurements are as expected on the board.
When I try to connect to the board using SWD in STMProgrammer (v2.20.0), I see the 3.3V, but the STMProgrammer does not connect. I am using a Minnie V3 (v V3J16M8) on Windows. I have tried lower frequencies and all modes and reset modes without success.
I should mention that on my prototype board, I have not mounted external crystals, flash or ram. Though I believe that is not necessary for STMProgrammer to see the MCU.
Any help is greatly appreciated!
