Ref schematic: https://developer.electricimp.com/sites/default/files/2017-07/imp005-node-rev5.0-sch-20170718.pdf
Pins XA to XE are in a block with the title “Supported Not Yet” which appears to be Jul 2017.
These pins work on the imp005 Murata board just fine. Do they work on the imp005-ez module (they are on the bottom of the module, not on the edge)?
What does that title refer to?
Yes, they work on the EZ module too. The reason they are on the underside is that there was limited room around the outside of the EZ - trying to keep it easily hand-solderable - but we still wanted to keep them accessible if possible.
Not Yet Supported was just on the old schematic symbols as early builds didn’t support them.