STM32G030C6 Getting Very Hot

Robert Ritchey · ‎2025-08-25

On my current board the STM32G030 is getting very hot. I have even tried a board with no connections to the processor and all pins set to analog. I have checked the power supply and it's 3.3V. The board runs OK but I am worried about the processor temp. I have attached a schematic of the board. Could something internally be configured to cause this heating?

Robert Ritchey · ‎2025-08-26

It was a bit embarrassing. I have a 3 pin connector (unpolarized) for power that goes signal, power, ground. In the board there is no notation which end is which. I was plugging it in backwards so the ground was a signal wire connected to the processor. The processor was grounded through an output. It ran just fine, programmed just fine, it just got hot. I must commend ST in building a processor so resilient to dumb mistakes.

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Robert Ritchey · ‎2025-08-25

Found it.

Peter BENSCH · ‎2025-08-25

Since you asked the public community for help, the community would also be happy to know what caused your problem. Perhaps this will also help another user?

Regards
/Peter

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Robert Ritchey · ‎2025-08-26

It was a bit embarrassing. I have a 3 pin connector (unpolarized) for power that goes signal, power, ground. In the board there is no notation which end is which. I was plugging it in backwards so the ground was a signal wire connected to the processor. The processor was grounded through an output. It ran just fine, programmed just fine, it just got hot. I must commend ST in building a processor so resilient to dumb mistakes.