2024-04-12 10:42 AM
Hello,
This is the first time I've designed a PCB with a stm32. I found a PDF on the internet that gives me an example of a Nucleo connection but I'm not sure if my schematic is correct.
I don't need all the headerts or the usb connection (I'll be using Stlink v2).
Here's a screenshot of my MCU schematic and my power supply schematic.
Can anyone tell me if this is correct or if I need to add or remove components and where?
Best regard.
Paulo971
2024-04-12 10:54 AM
Add capacitor at VCAP1 (AFAIK 2u2, but consult with datasheet).
Bring required level to boot pin.
Connect power supply to AVDD.
Do not connect 11.1V to VBAT pin on MCU !
2024-04-12 10:59 AM
Single VCAP pin, typically 4u7 F, two pins 2u2 F on each
Pull Down in BOOT0 to ensure your code in FLASH starts, perhaps option to go HIGH if you need to start the ROM based System Loader
2024-04-12 01:35 PM
Thank you very much, I completely forgot that I already had an input name VBAT
AVDD = 3.3V, I just gave it a different name to match the ST pdf schematic.
As far as the stlink connection is concerned, everything's fine?
2024-04-12 01:37 PM
Thank you very much, i'll fixe that ASAP.
As far as the stlink connection is concerned, everything's fine?
2024-04-12 02:21 PM
May want to connect VAPP, it's the MCU generated VDD to tell the ST-Link what signal level to use for the programming pins.
2024-04-12 02:25 PM
I wouldn't use pin 19 on the JTAG, on Segger J-LINK this is 5V
VTarget (3.3V) should go to Pin 1 to power ST-LINK buffers to match those of the board
2024-04-12 03:20 PM
I made these changes following all your recommendations.
2024-04-13 09:52 AM
kind reminder
2024-04-15 06:14 AM
Kind reminder