You could try theselink, Pmod Modules - Page 1 - Digilent or https://www.digilentinc.com/Pmods/Digilent-Pmod_%20Interface_Specification.pdf . Could you share what you trying to do exactly?
Let me know if these help and thanks!
Thanks for your reply. Those docs should help.
At the moment, I am just evaluating how easy it would be to add the functionality of the PMOD range of boards to a 'real' application. I don't have a defined application in mind yet, though.