About incidentallyhandmade

incidentallyhandmade · 2025-03-31

Hello everyone, I'm facing an issue with a custom PCB I made using the STM32H755ZI.I also own the nucleo board for the MCU, so I'm sure the program works well; it's just a blink program.The power schematics are inspired by the nucleo board schematics...

incidentallyhandmade · 2025-04-01

Hello,We tried flashing it and it never worked after flashing.https://community.st.com/t5/stm32-mcus/unable-to-connect-to-stm32h7-devices/ta-p/49296Followed this article to do a full chip erase in boot0 mode and now the MCU is not being detected in S...

incidentallyhandmade · 2025-04-01

Hey,1. We will be exploring other MCU models in the future which dosent have a SMPS.2. DS recommends 2.2uF on all VCAP pins.3. Understood4. Yes just LDO, SMPS is off.Any pointers on getting my current MCU up and running ?

incidentallyhandmade · 2025-04-01

Hello,An update on the situation.I've changed the VCAP capacitor's to 2.2uF 16V capacitors. There are are 3 VCAP pins, all 3 have been changed.The MCU is still not being detected by the ST-LINK. There is is now a weird behavior as follows. - The VCAP...

incidentallyhandmade · 2025-04-01

Hello,- The MCU which we are using is STM32H755ZIT6 to be exact. I'm not sure what do you mean by non-Q version.- There are 3 VCAP pins on this MCU, so I was thinking of using 3 x 2.2uF CAP's on each VCAP pin.- Can you explain the 4.7uF + 0.1uF capac...

incidentallyhandmade · 2025-04-01

Hey,Thanks for the reply. - Yes, this is my first time using this CPU in the PCB design.- I already own the NUCLEO-H755ZI-Q and have used the schematics you attached as a reference for the PCB I made.- The blink program I made for the NUCLEO-H755ZI-Q...

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Custom STM32H755ZI board not working

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