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Best answer by Andrew Neil

You mean these:

AndrewNeil_0-1727948310036.png

https://www.st.com/resource/en/user_manual/um2427-how-to-use-the-st-nfc-sensor-tag-evaluation-board-stmicroelectronics.pdf#page=25

Indeed, it is stated in the Bill of Materials that these are not mounted:

AndrewNeil_1-1727948535629.png

 

@isaacseeto wrote:

 what purpose do these components serve if populated?

Presumably to accommodate different variants/revisions of the board;  eg, using a different accelerometer?

1 reply

Andrew Neil
Andrew NeilBest answer
Super User
October 3, 2024

You mean these:

AndrewNeil_0-1727948310036.png

https://www.st.com/resource/en/user_manual/um2427-how-to-use-the-st-nfc-sensor-tag-evaluation-board-stmicroelectronics.pdf#page=25

Indeed, it is stated in the Bill of Materials that these are not mounted:

AndrewNeil_1-1727948535629.png

 

@isaacseeto wrote:

 what purpose do these components serve if populated?

Presumably to accommodate different variants/revisions of the board;  eg, using a different accelerometer?

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
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