Organize and Connect
　　You can build signal chains at the chip level by interconnecting
　　user modules to each other and the I/O pins, or connect system
　　level inputs, outputs, and communication interfaces to each
　　other with valuator functions.
　　In the system-level view, selecting a potentiometer driver to
　　control a variable speed fan driver and setting up the valuators
　　to control the fan speed based on input from the pot selects
　　places, routes, and configures a programmable gain amplifie
　　(PGA) to buffer the input from the potentiometer, an analog to
　　digital converter (ADC) to convert the potentiometer’s output to
　　a digital signal, and a PWM to control the fan.
　　In the chip-level view, perform the selection, configuration, and
　　routing so that you have complete control over the use of al
　　on-chip resources.