Power Bank Power Supply Issue for STM32H743ZI2

[wolf_sripe]

Hello Support Team,

I am trying to use a power bank to supply power to my STM32H743ZI2 board. I have made a modification to the jumper settings: I changed the connection of JP2 from pins 1-2 to pins 7-8 as suggested for power bank usage. However, I am encountering an issue where the LD4 LED is blinking intermittently.

Could you please provide guidance on the following points:

1. Is the jumper setting adjustment from JP2 pins 1-2 to 7-8 correct for power bank usage?
2. What does the intermittent blinking of the LD4 LED signify?
3. Are there any additional configurations or checks required to ensure stable operation with a power bank?

Your assistance in resolving this issue would be greatly appreciated.

Thank you for your support.

Best regards,

Wolf Sripe

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Additional Information:

• Board: STM32H743ZI2
• Power Source: Power Bank
• Jumper Configuration: JP2 changed from pins 1-2 to 7-8
• Issue: LD4 LED blinking intermittently

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Thank you for addressing this matter at your earliest convenience.

[SofLit · Accepted solution]

Hello and welcome to the community.

STM32H743ZI2 is a microcontroller not a board, do you mean NUCLEO-H743ZI?

If yes, the recommendation on how to power the board is provided in the board's user manual (UM2407 or UM2408 following the board you are using MB1363 or MB1364) especially the section "External power supply input 5V_EXT (5 V, 500 mA max)"

[wolf_sripe]

So i cant use with cable usb?