1.3. How the Flash Programmer Works
The Nios® II Flash Programmer has two parts, the host and the target, as shown in the following figure. The host portion runs on your computer. It sends flash programming files and programming instructions over a download cable to the target. The target portion is a hardware design, running in the FPGA. The target portion accepts the programming data—flash content and required information about the target flash memory device—sent by the host, and follows the instructions to write data to the flash memory device.