I got tired of cross-referencing schematics and data sheets to figure out what the pins on the WiFiMCU can actually do, if you're running your own custom firmware. so I sat down and create a diagram with as much information as I could gather from the data sheet of all the alternate functions for each pin.
The result is here: https://bitbucket.org/WAHa_06x36/emw316 ... iFiMCU.png
It looks a bit funny because it was rendered with ditaa, and could certainly use some colour coding, but maybe somebody will find it useful.
(Original ditaa input here: https://bitbucket.org/WAHa_06x36/emw316 ... iFiMCU.txt)