It is important to demonstrate the color requirement of the graphical menu examples that were shown on the previous slide. This is because most of these graphical interface applications are less color intensive and do not require life-like color support. Most of the time, 256 simultaneous colors are plenty to create a “cool” looking interface and provide a rich user experience. Because of that, the image buffer requirement is not as high as one would think. For a 256-color in 320x240 (QVGA) resolution, the image buffer only needs 76kB of RAM space. Also, by using the color lookup table or color palette concept, there is a way to use a different palette during screen updates. Therefore, a different set of 256 colors can be displayed without requiring additional RAM space. The reason why this is highlighted is that there is no longer a need to add external RAM to support a users color and resolution requirement. With the PIC24FJDA family, designers can eliminate the external component for their graphical interface designs and save overall system BOM cost. Also, the PIC24FJDA family implements the color lookup table concept. It allows for dynamic switching of different color palettes and each palette can utilize a different set of 256 colors.