Can you please let me know the validity (ACTIVE/DISCONTINUED) of below part numbers.
If part is valid then please provide us the supported datasheet.
Your first item comes back as an Atom E3815 and this processor is still active. Specs are detailed here: https://ark.intel.com/content/www/us/en/ark/products/78476/intel-atom-processor-e3815-512k-cache-1-46-ghz.html. As for datasheet, because this is an embedded product, NDA restrictions apply.
Your second item is not listed as being a valid part number insofar as ARK is concerned; you can ask about this while you set up your NDA. ;^)
Thank you for contacting Intel Customer Support.
In regards to your question, we would like to encourage you to post the technical information you are looking for in the following community site:
They can help you with additional questions about Intel Xeon D Embedded Processors.
Also, if you already know the FAE (Field Application Engineer) that corresponds to you, you can contact hem to gather more details.
Have a great day.
Intel Customer Support