Page 94 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

FIGURE 4-11 Two components and a bus.

Now here’s the trick: to allow connections to the bus, a special convention is used in naming the

bus. Change the name of the bus to “LCD_BUS1:DB[4..7], E,RW,RS.” You can change the name of
the bus using the Name or Information commands. This name tells the bus object that any net being
connected to it can be connected to one of eight possible slots: DB4, DB5, DB6, DB7, E, RW, or RS.
The square brackets and “..” specify a range of values. We could also have set the name to be
“LCD_BUS1:DB4,DB5,DB6,DB7,E,RW,RS,” and it would work just as well.

Now, when you drag out a net from, say, PD7 on the microcontroller to the bus, it will present a
list of possible connection slots (Figure 4-12).