This tutorial shows you how to simulate VHDL code. This code is intended to run on an FPGA and includes a software-only version of the AVR 8-bit microcontroller core. Essentially, you’ll ...

It features 128KBytes of onboard SRAM, where 64KBytes of the SRAM are directly coupled to the 32-bit AVR CPU for increased performance optimization, and two blocks of 32kB SRAM on the high-speed bus.