What is the FWDN mode? I accidentally pressed a button when turning on my android tablet and it says (typos included):

The Device enter FWDN Mode
Please Connect USB to PC or Reset
The Device Waitting........ 


What's the FWDN Mode?
As per my comment in the above, I would gauge a guess, its some sort of a F irm W are D ow n load

A specialized mode particular to that device to enable updating - think of OTA firmware update but using some proprietary software to download the firmware - possibly radio baseband, or a ROM update...