LatticeECP3 pinout and migration files can be found on the LatticeECP3 Web Page.
You will see a list of the most current versions of the following:
The pinout files provide a complete list of pinout information for all packages per device. The migration files compare two devices by listing the differences between the pins/pads for specific devices and packages. The migration file shows any new, changed, or deleted pins/pads. The pinout and migration files can be easily searched and formatted and data in the files can be easily sorted.