There are several industrial board products available in the market based on Atom processor with extended temperature parts. Therefore a suitable FWH must ba available. I do not think it is an Intel part.
Hopefully someone in the community will have some experience to share with you. In the meantime, have you checked with your parts distributor ?
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Hello again, lim:
I did some more checking on this and my colleagues at Intel tell me that in fact they are not aware of any industrial temp FWH devices being offered on the market.
They suggested two possibilities:
1) Customer can buy commercial temp and have them recertified by a 3rd party.
2) Implement an LPC to SPI bridge in a CPLD and use a SPI Flash. There is a whitepaper on that topic at the link below...
As I previously mentioned, there are many industrial grade boards available using Intel Atom. Perhaps we can get one of those companies that offer those boards to comment.