stm32g030 not flashing

[WBria.1]

i'm trying to read the G030 mcu (from my PCB) with cubeProgrammer and the results are:

"No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication"

Today the debug pins are direct connection (without any pull-up or down), as show:

But I already tried to pull-down (and pull-up) the SWCLK pin (as shared with BOOT0). but no way to recognize te MCU.

Any idea? I just want to flash my first code into this G030

[TDK]

Should work. Check power, check for proper orientation, check the schematic against the hardware design guide. Post the full schematic if you want someone to check it.

Probably not the issue, but counterfeit programmers don't always work.

[Tesla DeLorean · Accepted solution]

Check logic level on NRST

Make sure analogue supplies are hooked up. They are used by oscillator and reset circuits.

Check part orientation. The failure is that the part is non-responsive / non-functional. Debug as such.

[WBria.1]

the NRST voltage is arround 0.7 (i think it's not good because another MCUs that i have checked here is close to 3.3V)

the HW and SCH was OK. i'm checking now the soldering process

[Tesla DeLorean]

Suggestive that the POR is clamping due to absent analogue supply

[TDK]

> the HW and SCH was OK

Doesn't NRST staying low contradict this? Might be worth another look. Issue has to be somewhere.

[WBria.1]

HW and SCH OK, i mean, the design it's OK (image below)

for sure, i have investigating another variant things, such as solder and now, the MCU origin (from suspicious vendor)

[Piranha]

HW and SCH OK, i mean, the design it's OK (image below)

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O, yes, the existence of R24 totally confirms it. Edited by moderators to adhere to community guidelines.

[WBria.1]

sorry i did not understood u.. this is my practice to use pull-up (if need it, i saw that G030 did not require but i design anyway) on NRST... what do u mean?

[Piranha]

i saw that G030 did not require but i design anyway

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WHY exactly did you do it? It's a simple question, what do you not understand there?

Edited by moderators to adhere to community guidelines.