With the display initialization complete, the touchscreen and audio registers are next to be configured. The two critical touch controller registers are the mode and threshold. The mode register configures whether to use the touch screen controller and how often touch events are sensed. The threshold register sets a limit for the amount of pressure required on the touchscreen to sense an event. As with the pixel clock, the sound needs to be disabled to prevent any unwanted pops and clicks as the display is enabled. This is done by setting the volume register to zero.