You can choose one of the following Atmel AVR microcontrollers to be used in the embedded systems project:

- ATmega32 (datasheet)

Here's a brief summary of all.

The ATICE 50 emulator supports also many other Atmel microcontrollers that the ones listed above. If you are able to retrieve one of them to yourself, you are allowed to use them too.
Or if you wish to use any microcontroller, you may do so, provided that you can arrange the development tools for yourself.