After creating a new project, we can create a new BDF by clicking File→New→Block Diagram/Schematic File. This will create a blank canvas for us to design our circuit on.. Figure 3: A bus in Quartus for multiple signals, grouped together; subscripts to differentiate the signals. Figure 4 shows several examples of wires and buses in a Quartus schematic entry (bdf) file. For example the signal X (X[5..0]) appears as X[2..0] and X[3] in various places in the block diagram/schematic (bdf) file.
To create a new schematic file (*.bdf) in the Quartus® Prime Pro Edition software, point to File > New and select the Block Diagram/Schematic File. To insert block symbols into the schematic, double-click the schematic file and choose the appropriate block symbols.. SCHEMATIC DESIGN IN QUARTUS Consider the design of a three-bit prime number detector. The block diagram and truth table are shown in Figure 1. The inputs are signals named A, B, and C and the output is a signal named PRIME. Note that this example calls 1 a prime number for the purposes of illustrating equation simplification. The mathematical definition of a prime number would not consider 1.