It´s correct. It´s not possible to switch to another pin variant of CPU package using "CPU type" property.
To avoid your problem I suggest one of the following steps:
- create new project and select requested derivative within project wizard (for more detials please find attached screenshot)
- in existing project add requested derivative (MC9S12XEQ512_80) from "Beans Selector" window (for more details please find attached screenshot) and consequently using "CPU type" property switch to MAA package.
best regards
Vojtech Filip
Processor Expert Support Team