In the zero 3w board schematics (downloaded on this page https://radxa.com/products/zeros/zero3w/#downloads) I see that there is HW_ID and BOM_ID blocks that connected to the SARADC_VIN1 and SARADC_VIN2 inputs. Does anyone knows what is purpose of this two inputs?
SARADC on Zero 3w
Probably to check on HW_ID and BOM_ID, I imagine different analog values are mapped for each board revision
If you modify the schematics you can replace them with anything you want
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Yes, thats sounds logical