Hello there,
You can find some related articles here https://learn.microsoft.com/en-us/windows/iot-core/manufacture/bsphardware
Board Support Packages (BSP) is a collection of drivers/settings required to run IoT Core on a hardware platform. These are provided by the hardware vendors/silicon vendors. The BSP also includes a set of device drivers that are specific to the components/silicon used in the board, mostly in the form of .inf files and their associated .sys/.dll files.
Hope this resolves your Query !!
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