On the V2533 engine, what protections do the FADECs provide against uncommanded unstow?
Not from an FCOM, but from an A319/A320/A321 IAE V2530-A5 training manual, it's the same thing as the CFM:


  Inadvertent Stowage/Deployment
  
  In either case the LVDT [Linear Variable Differential Transformer] sensors would detect a movement the EEC
  would execute auto−restow or auto−redeploy.
  
  If the reverser travel exceeds 15% of its travel from the fully stowed position
  then the EEC will command idle.
  Following restow, full power is again obtainable.