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Associate II
Oct 29, 2025 11:14 AM UTC
Question

Function of U5 (ST890DTR) in B-G431B-ESC1 Development Board

1. In the B-G431B-ESC1 development board, there is a component labeled U5 (ST890DTR) in the circuit. Could you please explain the exact purpose or function of this component in the board’s design?

2. If the U5 (ST890DTR) component is removed from the B-G431B-ESC1 development board, what types of issues or malfunctions could occur? Would the impact be considered minor, major, or critical to the board’s operation?

4 replies

GMA
ST Technical Moderator
Oct 30, 2025 6:57 AM UTC

Hello @Ankitesh,

Refer to ST890 page for feature description and documentation.

If you agree with the answer, please accept it by clicking on 'Best answer'.Best regards.GMA
AnkiteshAuthor
Associate II
Oct 30, 2025 7:44 AM UTC

Dear Sir,
I have already the B-G431B-ESC1 development board, I just want to know about U5 (ST890DTR) in the circuit. So that i can remove it. 

 Can you please answer the questions i had mentioned? That will help me.

Senior III
Oct 31, 2025 6:29 AM UTC

Any reason why you want to remove U5 IC?