I have (had) a similar interest when I heard about this chip. I sent
their tech support a request for block level access. They do have a so
called diagnostic block read support but no write.
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My initial inquiry - Oct 16th 2006
Hello, I have been reviewing the commands available with the various
firmware modules. I see you have a sector read command but not write. Is
it possible to get a version of the firmware that supports both so that
custom non FAT file sytems can be accessed?
Their initial response back on - Oct 17th 2006
I have put this to the development team and will let you know.
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My Follow up on - Jan 9th 2007
Hi Gordon, I was just wondering if you had an update for me?
Their second response back on - Jan 9th 2007
I do not have any new firmware as yet.
The team is currently working on adding slave port functionality and
will review feature upgrades after that.
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Perhaps it's time to ask again :-)